80cc big bore kit. - All SunL 49cc/50cc scooters.

80cc big bore kit. We have plenty of step by step videos to show repairs and parts installs via our YouTube videos. I have a 2014 Vespa LX50 4-stroke and am considering getting the Malossi big bore kit bumping it up to 79cc. Apr 11, 2010 · I have made a big bore kit for a suzuki fa50 just finished it puting it on tomorrow was going about 35-40 with everything i had done so far and now im uping the piston and got a better exaust porting the jug more shaving the head and jeting the carb and drilling the piston should crank right out now. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jul 11, 2024 · What is a good starting point for a main jet for an 80cc big bore kit? Scooter owners discussing main jet sizes for 80cc big bore kits and scooter modifications Oct 10, 2014 · Upgrade your 50cc scooter to achieve more acceleration and top speed with a 47mm/80cc Big Bore Kit. Honda 70cc big bore kit to convert to 88cc big bore 4 speed motor. Unlock the ultimate power boost for your Kawasaki KX65 with this premium Athena 80cc Big Bore Cylinder Top End Kit! This is the best and most reliable rebuild kit on the market! 5 days ago · Wide Compatibility: Designed for a wide range of Chinese scooters, mopeds, ATVs, and go-karts, the RedCap Big Bore Kit fits most 4-stroke GY6 or 139QMB engine models from 50cc to 80cc. 69mm valve length version Simple Installation With cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug Upgrades Feb 28, 2017 · BRAND NEW Big Bore Kit GY6 Atv Scooter Engine Motor 50cc to 80cc. - All Peace 49cc/50cc scooters. How to install a big bore kit on 4 stroke GY6 scooter engines including 50cc 139QMB and 150cc 157QMJ scooter engines. NCY GY6 50/QMB139 50mm bore Cast Iron Cylinder Kit w/o head. The new, kit piston measures To purchased a big bore kit click the link below: 80cc click here 90cc click here This video will cover these models: - Any machine with a QMB139 / 139QMB / GY6 50 (4-stoke) engines. A. If it doesn’t run well, it doesn’t go anywhere at all. Enhance your 2-stroke and 4-stroke engine with Millennium's big bore kits. Sep 14, 2025 · 80cc-Big-Bore-Kit-Cylinder-Piston-Rings-Set-Chinese-Scooter-50cc-GY6 80cc-. WHEN USED IN CONJUNCTION WITH A STOCK STROKE OF 41. KIT INCLUDES ADDING MORE POWER FOR BETTER PERFORMANCE. Sep 7, 2025 · Upgrade your ride today and experience the difference with this high-performance kit, meticulously crafted to redefine your scooter or moped's capabilities. This kit includes everything you need, including the A9 Cam and Rocker Arms assembly. One of the best ways to make a Chinese scoot run a lot better is to install a big bore kit in the engine. And to answer the question: Yes, it's adjustable and doesn't have the cutoff screws like so many others. com FREE DELIVERY possible on eligible purchases Aug 3, 2019 · 1. I out it all back together and I am having the weirdest problem. KIT INCLUDES CYLINDER, PISTON, RINGS, PISTON PIN, CIR CLIPS, CYLINDER HEAD, HEAD GASKET, AND BASE GASKET. 1x Piston Pin. 64mm valve length version Easy Installation Upgrade engine parts included cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, clutch spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3 If you are looking for performance upgrades for your GY6, Ruckus, Navi, Zuma, Metro or even Maddog scooter this is the spot. Not only do you get a really good speed boost, but these kits are very reliable. THIS KIT HAS A 47mm CYLINDER BORE AND 64MM VALVES. This kit is too cool and the large fins help keep it that way. - 47mm Piston Set With Rings & Wrist Pin. 7cc! VESPA Sprint 4V 50 4T euro 2 For ORIGINAL HEAD Malossi 80cc Big Bore Cylinder Kit for Vespa LX 50, S 50 and Aprilia Scarabeo 50cc 4 Stroke US models. I tested the Pw80 Big Bore Kit and was blown away by its performance! Upgrade your ride with this top-rated kit for an unbeatable riding experience. 2008 Kawasaki KFX50 80cc big bore kit w/upgraded A9 cam Pilot and main jets tuned for upgraded parts Stock air box and exhaust Runs great and starts easy w/ electric start. It will also need exte Please help!! So I got a 80cc big bore kit for my 50cc moped put it on and tried to start it I’ll send a vid but it’s getting spark, fuel, compression,smokes out the exhaust I’m really confused Upgrade your 50cc scooter to achieve more acceleration and top speed with a 47mm/80cc Big Bore Kit. 1x Piston. Mar 21, 2022 · Glixal GY6 80cc 47mm Scooter Rebuild Kit Big Bore Cylinder Kit with Cylinder Head Assy 139QMB 1P39QMB Moped ATV Go-Kart UTV Engine (64mm Valve Length) 80cc big bore kit for People 50 4t. Our kits are high quality, complete and ready to build right out of the box. This is the big port style- GIANT transfers. Then review the list below. Jan 24, 2025 · PEOPLE REFER TO THIS KIT AS 80cc. 80cc BIG BORE KIT FOR CHINESE SCOOTERS. Q. . com Scooter Forums 4 Stroke Scooters And Mopeds gy6 80cc big bore jetting Scoot F. 2x Cirq clips. THIS KIT HAS A 47mm CYLINDER BORE. this " how to install a big bore kit" video will walk you through the entire thing. When you use this Polini 49mm Big Bore Kit in conjunction with your stock crankshaft you will increase your total displacement to 78. Upgrade your 50cc scooter to reach higher speeds and improved acceleration with Pitmoto's Big Bore Kit - 47mm/80cc. Kit Includes: - Assembled Cylinder Head 70mm Valve Length. Upgrade 47mm 80cc Cylinder Kit for GY6 50cc Engine 3. All maddogs use 69mm valves 80cc (72cc) kit A big bore kit typically consists of a new larger bore cylinder, piston kit, and top end gaskets. This kit will require boring your cases. Shop now for fast shipping and easy returns! 80cc (47mm BORE) UPGRADE KIT FOR QMB139 MOTORS TRUE DISPLACEMENT *72cc WITH STOCK CRANK* PEOPLE REFER TO THIS KIT AS 80cc THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139 MOTOR AND TURN IT INTO A 72cc / 80cc MOTOR ADDING MORE POWER Apr 16, 2016 · Inner diameter of cylinder: 47mm,outer diameter of piston pin: 13mm. RedCap EGR Big Bore Head & Cylinder Kit for GY6 Scooter 69mm Valves - BBK 80cc Cylinder, Piston, Rings, Wrist Pin, Circlips, Head & Base Gaskets - Fits with 50cc, 60cc, 4-Stroke GY6/QMB139 Engines Once installed your scooter will literally feel like your scooter has twice the power! This 80cc big bore kit (cylinder kit) is built in Italy by Malossi. What other parts or supplies will I need along with a big bore kit? ( 139QMB / GY6 50 / QMB139 / 1P39QMB ) First read the F. Unleash greater power & performance for an exhilarating ride. That’s if it runs well. - All Puma 49cc/50cc scooters. THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139. 005 If you are a newby and have no idea how to install a big bore kit on your GY6. This engine rebuild how to video will work on all qmb139 engines. This Parts Fit Most of Chinese Made Scooters and ATVs. I've received conflicting information on what should be done besides changing the head and piston. I have been working hard and haven't had much time. Looking to use my stock carb (as long as i can get it tuned running good) And also remove air box and install a open air filter. Jan 29, 2021 · Buy Green-L GY6 50CC To 80CC Big Bore Cylinder Kit Fit for Roketa Taotao Baja 4 Stroke Scooter: Cylinder Heads - Amazon. Cylinder Gasket GY6 50cc. TAIDA 50cc QMB139 4-STROKE 50mm, RACING BIG BORE CYLINDER & HEAD KIT. This is the most detailed Big Bore instructional video out there! We take you step by step on how to install an 80cc or 100cc big bore kit on your 50cc at home, without missing a step. 80cc Big Bore Kit with 64mm Valve Head Assembly. Shop with confidence. 4 Stroke. Anyone else need some addvice on how to make your Fa50 go faster ive found just about all the Aug 26, 2025 · 50cc, 60cc, and 80cc, QMB139 MOTORS WITH 64mm VALVES. Cimatti, Testi, Fantic Motor, Yankee Peddler, Concord, and many more. Replacement for gy6 49cc 50cc 60cc 80cc engine. Ships free from MotoSport. I bought the 50mm big bore kit from scrappy dog scooters and a larger carb (20mm). For stock bikes from 1970-1981. - All Roketa 49cc/50cc scooters. It was great! Oct 6, 2014 · Malossi 80cc big bore cylinder kit - ⬆️ About 6 years elapsed ⬇️ Post Reply Forum -> General Discussion ATHENA CYLINDER Big Bore 50mm (80cc) KTM 65 SX P400270100002. This comprehensive kit includes everything you need for a seamless installation, including the A9 Cam and Rocker Arms assembly. - All Taotao 49cc/50cc scooters. No more guessing games with valve measurements, as we have thoughtfully included the rocker arms assembly to ensure compatibility. Dial it in, and don't worry about a thing. This bumps your displacement from 49cc to 80cc. I have the engine block back together with an 80cc BBK, and will be cleaning the stock carb tonight. The kit includes the high-quality aluminum cylinder with increased bore, the cylinder head, the complete piston with the piston pin and rings, and all the necessary gaskets. Buy Complete Big Bore Kit MMG 80cc for 50cc 4 Stroke Chinese Scooters. - All Znen 49cc/50cc scooters. The time now is 01:16 AM. 50cc ATVs. GY6 80cc Cylinder Head with 69mm valve. 80cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE Sep 24, 2019 · This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed. This Malossi 80cc Big Bore Kit fits all 2 and 4 Valve Piaggio 50cc 4 Stroke air cooled engines in Vespa, Piaggio and Aprilia Models. Complete GY6 80cc Big Bore Upgrade Kit. COMES WITH ADJUSTABLE NEEDLE, NEEDLE CLIP, NARAKU REPLACEMENT PISTON KIT FOR QMB139 4-STROKE 47mm BIG BORE CYLINDER KIT KIT INCLUDES PISTON, RINGS, PISTON PIN AND CIR CLIPS. Fits many models suchas YERFDOG, SUNL, SYM Sep 19, 2022 · I go talk about the 80cc Big Bore kit for gy6 scooters and if it is actually worth it and what it is like after installing it. I have spark and compression now but it wont start now. 4mm THE TOTAL Explore a wide range of our Gy6 80cc Big Bore Kit selection. Which one out there is best?Your scooter was designed and built with a 50cc motor to be used by one person . Aug 27, 2025 · 50cc, 60cc, and 80cc, QMB139 MOTORS. This is a complete 80cc 2 stroke Bicycle Engine Kit. Non-EGR Engine. Designed to be compatible with 50cc and 60cc GY6 engines commonly found in Chinese scooters, this kit ensures a seamless fit and easy installation process. GY6 50cc 47mm QMB139 Big Bore cylinder Engine kit. Only one thing to note is some people have experienced overheating with the 100cc kit because the cylinder walls are thinner. The perfect upgrade for most QMB139/GY6 50 scooters, this bolt-on 81cc kit will really give your scooter some go. 2x Head Gasket Set. The stock bore is 39mm, coupled with a 41. Includes 1x Cylinder Block. QMB139 47mm Piston Kit. Thanks. Polini 49mm (78. Upgrade Kit 47mm cylinder, up to 80cc (Cylinder Kit + Cylinder Head 70mm valves + Camshaft + rocker arm kit ) Free Blocking Plates. - All Tank Metrakit 47mm "80cc" kit for Puch mopeds. There are scooters with motors , frames , brakes and suspensions that are designed to be able to safely carry more than one person . Both kits are direct bolt ons and work with supporting mods. Unlock new levels of power, speed, and agility with the GY6 Scooter Moped 80cc Big Bore Kit with A9 Cam, your ticket to unmatched riding excitement. Which big bore kit should I get? ( 139QMB / GY6 50 / QMB139 / 1P39QMB ) First you need to decide on the cylinder bore size. Discover more about the small businesses partnering with Amazon and Amazon’s commitment to empowering them. Although I am mechanically inclined, I was just 17 at the time and didn't have any help, so I took it to a mechanic to get it done. Check local laws before installing. FITS MOST CHINESE SCOOTERS WITH. At Rolling Wrench we use nothing but the best. stock air box and stock jets in stock carb. Jul 30, 2015 · Buy Glixal ATMT1-008 Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart: Rebuild Kits - Amazon. I have a set of main jets coming in the mail, and wondered what people would Hi, Could anyone tell me if a 70cc or 80cc big bore kit would be best? I do not want the bike as a racer, I want it as a faster more powerful road bike. The stock piston in your engine measures 39mm wide. This kit is high quality. Cylinder rebuild kits is an ideal replacement for your old or broken ones. MOTOR AND TURN IT INTO A 72cc / 80cc MOTOR. - All wolf / Gorilla 49cc/50cc scooters. GY6 80cc Big Bore Cylinder Kit. NEED TO ALSO UPGRADE WITH 20mm CARBURETOR. Upgrade today! Aug 4, 2017 · In stock form, the average 4-stroke 49cc Chinese scooter is painfully slow. This 72cc kit is the ticket. com FREE DELIVERY possible on eligible purchases Jun 20, 2011 · Looking at ordering a 100cc big bore kit (yes the stroke is only around 85ccc). to/2hlBHvK TaoTao Thunder Scooter Pricing / Specs. 5mm Larger Valves) NCY aftermarket big bore kit upgrade for Honda Dio or Sym DD50 Not legal for use in California on pollution controlled vehicles. to/2yqLgQT Scooter Tuning Tachometer Dec 25, 2017 · After purchasing your big bore kit for us, use this video to help with the install of your qmb139 90cc big bore kit. - All Bali 49cc Feb 2, 2014 · 49ccScoot. Just installed a new engine head onto my 80cc big bore kit cause the last one had a super stripped spark plug socket and a snapped exhaust stud that I couldn't extract, and after installing it I couldn't get the engine to start for the life of me. performance Cylinder Kit, 50mm Big Bore 80cc for 50cc 4-Stroke 139QMB Scooters Description Details Reviews 50mm Performance 80cc Big Bore Cylinder Kit for 50cc 4-Stroke 139QMB Scooters SPECIFICATIONS: Upgrades to 81. question regarding big bore kits HERE if you haven't already. ***MADE IN ITALY*** **NOTE: Electrical, High Performance, Aftermarket items are non-returnable so please check photos and specifications before ordering. This meticulously crafted kit includes an EGR Head Cylinder, Piston, and Rings, meticulously designed to fit seamlessly into your scooter's engine. 3cc! Bore: 50mm Overall Height: 70mm Cylinder Sleeve Outer Diameter: 54. blue cdi box. AND TURN IT INTO A 80cc MOTOR. com FREE DELIVERY possible on eligible purchases Feb 7, 2008 · Athena's Big Bore kit brings the raw power you have been missing in an easy to install, reliable package that bolts on with no machining needed in most cases, and includes easy-to-follow step-by-step installation instructions Built from race proven designs to Kawasaki factory specifications Podium-finisher with world-class teams across all forms of high-performance racing including super cross The kit includes the high-quality aluminum cylinder with increased bore, the cylinder head, the complete piston with the piston pin and rings, and all the necessary gaskets. I was able to get it to start twice and ran great when it did but all the other times it will just barely start and will stay under 1,000 rpms and won't get going. valves are set to . GY6 BBK 80cc Have been trying to get my scooter to run a little faster/ more grunt, installed a 50mm big bore bit and a 24mm carburettor. Battery is dead now from trying. Some big bore kits will also include other items like bigger carburetors, performance camshafts, and big valve cylinder heads to deliver additional Get the best deals for Yamaha Raptor 80 Big Bore Kit at eBay. I noticed that there are some major differences from the stock head that I pulled off to the Big Bore Kits 50cc Big Bore Kits come in 80cc (which is actually 72cc) and 100cc (which is 81. Kit includes cylinder, piston, rings, piston pin, cir clips, dowel pins, and gaskets. Shop now for fast shipping and easy returns! Nov 9, 2009 · Athena's Big Bore kit brings the raw power you have been missing in an easy to install, reliable package that bolts on with no machining needed in most cases, and includes easy-to-follow step-by-step installation instructions. minarelli v1 80cc BIG BORE performance pack TIER TWO! comes with the 80cc polini kit, custom cut matching cylinder head, MLM exhaust, gaskets, piston, rings, clips, motion left mopeds intake, mikuni vm20 carburetor and mounting hardware!! WOAH!!! Find great deals on eBay for Big Bore Kit 80cc Gy6. The photographs in this booklet are installing an 80cc bore kit in a 50cc GY6. 4mm THE TOTAL Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18. Available for 2-stroke and 4-stroke engines. We did a lot of testing with the eBay/amazon kits, they failed over time almost every time. 004-. - All Tank 49cc/50cc scooters. When you need more power turn Athena great power gains with OEM reliability all at a great price. 96mm matched piston with molybdenum coating and matching cylinder head Special gasket kit Easy-to-follow step-by-step installation instructions Bolt-on kit; no machining required Fits KTM 65 2001-2008 only! Aug 2, 2025 · Transform your scooter or ATV experience with our GY6 80cc Big Bore Cylinder Kit, designed for performance enthusiasts who crave speed and efficiency. Specs: Diameter: 47mm (53. at TXPowerSports. to/2ysvcOh Glixal Big Bore Kit 50mmhttp://amzn. Athena Big Bore Kit KTM 65 (01-08) -> 80cc (50mm) Kits include aluminum cylinder with galvanic coating designed with wider water jackets Forged 49. The kit also features The BBR Tuning V2 100cc Motorized Bicycle Engine Kit is an upgraded version of the BBR Tuning 100cc Motorized Bicycle Engine Kit and is now one of the most powerful 2-Stroke motorized bicycle engines out there, outperforming even the most supped-up 66/80cc motors in torque and top-end speed. Jul 8, 2021 · Here's a quick video showing the difference that installing a 47mm big bore kit (72cc) and A9 camshaft made on a 49cc Chinese four-stroke scooter. 1x Complete Ring Set. ADDING MORE POWER FOR BETTER PERFORMANCE. 50cc Buggies. kymco agility 50cc -80cc kit « on: April 26, 2014, 10:32:37 PM » Hi all I am thinking about doing a 80cc big bore kit to my agility 50cc Is there anything that would cause a issue when upgrading 47mm 80cc Racing Cylinder Kit for Kymco Four Stroke Scooters. WORKS ON ALL YAMAHA GRIZZLY BADGER AND RAPTOR 80 MODELS AND YEARS BPR stock bore cylinder Wiseco or Wossner high-quality piston Nitrite-coated piston rings Chrome wrist pin Circlips Vertex top-end gasket kit Valve stem seals Cam timing chain NGK spark plug Maxlok TITANIUM cylinder stud kit - LIFETIME WARRANTY*! Jun 12, 2013 · hey everyone i just finished putting in my 80cc kit with "57" mm piston. So if you are buying for your daily driver…go for the 80cc. Big bore kits on these engines give torque not speed, top speed is controlled by the gearing, but more restrictively on the 4 strokes, the rev limiter, which they hit in standard trim let alone big bored unless you change the ratio of rpm vs speed you wont gain much topend, just increase useable torque. Get the best deals for Gy6 80cc Big Bore Kit at eBay. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Hi guys, I bought a blown 50cc GY6 retro scooter a couple of years ago, and have been very slowly rebuilding it. This kit not only bumps the cc's, but the compression as well! This kit will fit both 4 valve and 2 valve cylinder heads. http://amzn. 5mm Larger Valves) At about 3000 I had the 80cc kit installed, previously it was 49cc. Engine Upgrade: Boost your scooter or moped's power and efficiency with the RedCap 47mm Big Bore Kit. 5cc. Metrakit went out of business a few years ago, and this kit was thought lost forever. 50cc GY6 Go Kart engine. We found a small stockpile of them, and are very please to share them with you. http://amzn. We install these kits on a regular basis, it took a lot of different kits for us to find a big bore kit with a decent price that actually holds up and is reliable. Get the most recent model of the highly sought after JL Zeda 2 stroke bicycle engine kit with the new updated NT carburetor. What would I need to do to optimise the bikes performance? Such as race cranks, new 13 tooth front sprocket etc. I'm back now tho and we are back to my favorite bikes. I recently lost compression and i installed an 80cc big bore kit. SCO This QMB139 (GY6 50cc engine with big bore) carburetor kit comes with a round slide carburetor, Uni pod air filter, large ported intake manifold, throttle cable and jets! Has anyone used a big bore kit to go from 50 to 80cc? Some questions. - All SunL 49cc/50cc scooters. NARAKU 24mm CARBURETOR REPAIR KIT FOR 80cc - 150cc QMB139 & GY6 ENGINES MAIN JET: 102 (5mm) IDLE JET: 35 REPAIR KIT FOR 24mm NARAKU CARBURETORS. Complete top end rebuild kit for your Yamaha YFM 80 Badger, Raptor and Grizzly youth ATV. I've read some people recommend (or not) to include the following Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18. 0-30MPH acceleration is timed and wide open Jun 27, 2015 · And since this is a secondary scooter for me, I decided to install a big bore kit and if it never started again, I could still get to work on my primary scooter (Zuma 2012). 6mm HONDA DIO-SR BIG BORE CYLINDER AND HEAD KIT. com FREE DELIVERY possible on eligible purchases Amazon. CYLINDER HEAD (VALVES INSTALLED): NON-EGR 69mm VALVES . Learn more May 23, 2013 · Buy PCC MOTOR Big Bore Kit GY6 50cc to 80cc Scooter Moped 139 QMB 139QMB Cylinder Piston CK14: Rebuild Kits - Amazon. The Zeda 80 Pro Firestorm Edition engine with twin spark plugs can provide an increase in low end torque, improve acceleration, and ensure more consistent idling! It’s one of the least expensive 2 stroke engine upgrades you can get. Like any performance 72cc / 80cc (47mm BORE) UPGRADE KIT (#2) FOR QMB139 MOTORS THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139 MOTOR AND TURN IT INTO A 72cc / 80cc MOTOR ADDING MORE POWER FOR BETTER PERFORMANCE KIT FITS ALL SUZUKI LT-80 MODELS AND YEARS!Aftermarket 52mm big bore cylinderWiseco or Wossner forged piston*Hi temp piston ringsChrome wristpinCirclipsWrist Pin BearingBig Bore Cylinder headCylinder Head stud kitVertex or Namura Top End Gasket KitNGK Spark plugRuns on pump or race gas1 year warranty for piece of mind*BPRA Aftermarket Big Bore Kit with 20mm Carburetor Kit 88cc Big Bore Performance Kit (52mm) Lightweight aluminum cylinder with steel sleeve Cast in mounts on cylinder for aftermarket skid plates Oversized cooling fins on cylinder for efficient heat dissipation High compression 52mm piston with rings, pin, & clips Head g Sep 8, 2024 · Boost your Honda Ruckus with a Big Bore Kit! Discover top kits, installation tips, and performance upgrades for a faster, more powerful ride. Please see our Warranty and Returns Policy Aug 29, 2017 · Buy XMT-MOTO Scooter GY6 50CC To 80CC Big Bore Cylinder For VIP Roketa Taotao Baja Silver: Cylinder Heads - Amazon. You will not be disappointed!!!! This kit will fit all: minarelli v1 BIG BORE performance pack TIER ONE! comes with the 80cc polini kit, custom cut matching cylinder head, gaskets, piston, rings, clips, motion left mopeds intake, mikuni vm20 carburetor and mounting hardware!! ATHENA 47. 4mm COMPATIBILITY: Amigo - 50cc 4-Stroke Scooters Apollo - 50cc 4 Today we do a 50cc gy6 scooter Big bore kit install and test. Seamless installation process, allowing you to upgrade your engine from 50cc to 80cc with ease. Sometimes referred to as the 80cc Minarelli Polini Kit. Get the best deals for Big Bore Kit for Taotao 50cc at eBay. Iron bore cylinder. 3cc). Super classic kit- these have been around forever and for so long was THE kit to run. KIT INCLUDES CYLINDER, CYLINDER HEAD, PISTON, RING, PISTON PIN, CIR CLIPS, HEAD GASKET, BASE GASKET AND EXHAUST GASKET. com: big bore kit for 50cc scooterShop products from small business brands sold in Amazon’s store. Get more raw power out of your dirt bike or ATV with an Athena Big Bore Kit. GY6 BIG BORE KIT AND TOP END REBUILD GUIDE 1 The following is a general guide for installing a big bore kit OR rebuilding the GY6 type engine. 50cc Dune Buggies. Made of high-strength aluminum alloy and wear-resistant coating, it has excellent high-temperature and wear-resistant performance, and its robust structural design is able to maintain stability under high loads and long-time running conditions, prolonging the life of the engine May 25, 2019 · This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed. so as you all know, i had a roketa, and a kymco, The kit includes the high-quality aluminum cylinder with increased bore, the cylinder head, the complete piston with the piston pin and rings, and all the necessary gaskets. We specialize in making small bore GY6 engines faster and GY6 swapping Honda Ruckus scooters. 5/20. Italy's leading scooter parts distributor, RMS, is known throughout the world for high quality, reliable Scooter parts and accessories. Improve acceleration or top-end performance. New RK chain, battery, coil, spark plug and rear brake pads replaced last year. 4mm stroke to make 49. Many times sellers Jul 22, 2022 · 47mm Big Bore Cylinder Rebuild Kits Replacement Kits for 80cc 4 stroke 139QMB 139QMA GY6 ATV Go Kart Quad Scooter. Just a review of what it is like after you install an 80cc big bore kit on a Gy6 scooterLink here for the video I watched installing the BBK myself https://y Apr 21, 2012 · ill start off by saying that im sorry for my recent inactivity, my dad's salamander heater blew up and he has been in the hospital for a week now. 004 i have 8 gram roller weights. Explore a wide range of our Big Bore Kit 80cc selection. KIT INCLUDES: Only thing have issue with is the gasket that is for the Clutch Case it's too short. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Aug 17, 2015 · I have a 2014 taotao g5. Engine would turn If you are looking for the Big Bore Kit For Honda Ruckus? NCY STORE provides the Big bore kit and complete accessories of the Gas scooter at the unbeatable range. Hey guys sorry for the long wait for a video. Comes with all necessary gaskets. 72cc / 80cc BIG BORE KIT FOR CHINESE SCOOTERS (#3) 47mm BORE (NO BORING REQUIRED) Upgrade your 50cc scooter to achieve more acceleration and top speed with a 47mm/80cc Big Bore Kit. Jan 26, 2019 · Valve lash . We got this kit from amazon and we are 95% happy with it so far! Time will tell what this kit can handle. Find great deals on eBay for Big Bore Kit 80cc. Readers should take not that there can be minor variations in this as there are numerous companies in China who manufacture the GY6. #Pw80 #BigBoreKit I have a new taotao racer 50 that I just put an 80cc big bore kit on. Aug 14, 2025 · 80cc 47mm BIG BORE UPGRADE KIT (#2) FOR QMB139 MOTORS. Needing some pointers to what to try next, not a mechanic by any means but handy with some tools (electrician) Scoot F. Find top brands, exclusive offers, and unbeatable prices on eBay. Q. This kit is the classic big bore kit of yore. Big bore kits are commonly sold in 44mm (63cc), 47mm (72cc), 50mm (81cc), and 52mm (88cc). Has anyone installed this kit and got it running good? What Size Jets (Main And Pilot, Needle Setting)? Jul 30, 2025 · Introducing the 80cc Big Bore Kit Cylinder with a 69mm Head and Piston Rings, specifically designed for Chinese Scooters equipped with 50cc or 60cc GY6 engines. 7cc) Cast Iron Sport Cylinder Kit for Piaggio 4-Stroke 2-Valve Engine Powered Scooters. 47mm and 50mm kits are most popular and easiest to find at low prices. ATV Carburetor 150cc Kazuma SUNL Go-Kart FREE Filter GY6 GY-6 Carb 150 Scooter. Tried two different carbs (both with the same aftermarket pod filter, and one with a #97 main and the other with an #88) and tried setting the cam tuning advice. The kit fits best on bikes with 25 to 30mm diameter front down tube and 70 degree Vee type frame like a mountain bike but can be installed on larger diameter tube frames with modifications. They replace your stock Original Equipment Manufacturer (OEM) parts and increase horsepower and torque by increasing the engine size (displacement). Sep 3, 2019 · GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 69mm Valve scooter moped parts, GY6 Engine parts (69mm Valve Length) Mar 21, 2022 · Glixal GY6 80cc 47mm Scooter Rebuild Kit Big Bore Cylinder Kit with Cylinder Head Assy 139QMB 1P39QMB Moped ATV Go-Kart UTV Engine (69mm Valve Length) Replacement 50cc Big Bore Cylinder Kit and Head assembly boosts your 49cc scooter up to a 80cc scooter. Sep 3, 2025 · Introducing the ultimate upgrade for your Chinese scooter: the 80cc Big Bore Kit Cylinder with a 69mm Head and Piston Rings, specifically designed for 50cc GY6 QMB engines. Such as JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO etc 80cc big bore kit questions 50cc - 124ccAll times are GMT -4. Thread: Running 80cc big bore kit with stock crankshaft Thread Tools 02-06-2018, 02:07 PM #1 Istiniar Minarelli V1 Polini, both Italian, and both fast. Jul 13, 2024 · LX50 -> LX80 RMS Big Bore Kit ⬆️ About 2 months elapsed ⬇️ Post Reply This new and improved Zeda Pro engine is a complete 80cc 2-stroke Bicycle Engine Kit. Unless you have a master mechanic and vast financial resources you would be better served to get a scooter that was Aug 29, 2025 · This comprehensive kit is compatible with a range of GY6 4-stroke engines, making it the ultimate choice for enhancing performance. Oil was changed, chassis greased, and rear brakes flushed last weekend. We cover a few things to consi This 80cc big bore kit will fit the models below: - Any machine with a QMB139 / 139QMB / GY6 50 (4-stoke) engines. Before the Gila kit came to dominate, the Metrakit was king. com. With fast shipping and hassle-free returns, Pitmoto is the brand you can trust Jul 31, 2025 · Introducing the 80cc Big Bore Kit for GY6 139QMB Scooter Moped, engineered to elevate your ride to a whole new level of power and performance. Dec 27, 2024 · Tupo 47mm 80cc Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with GY6 4-Stroke 139QMB TAOTAO JONWAY ZNEN Roketa ATV Moped Go-Kart The kit includes the high-quality aluminum cylinder with increased bore, the cylinder head, the complete piston with the piston pin and rings, and all the necessary gaskets. 49cc to 80cc up Grad, Driving Test around the city. 2mm) Big Bore mostly fits: GY6 or GY6 engine clone (139qmb) Scooters. No problem. Transform your ride into a powerhouse with this high-performance kit. May 19, 2014 · I just installed an 80cc big bore kit with 64mm valves on my 2013 taotao vip with the 139qmb gy6 engine. New Products with High Quality from chinese brand factory 2. These work with all Minarelli V1 based Mopeds. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jan 24, 2025 · Product Description 80cc (47mm BORE) UPGRADE KIT FOR QMB139 MOTORS TRUE DISPLACEMENT *72cc WITH STOCK CRANK* PEOPLE REFER TO THIS KIT AS 80cc THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139 TAIDA 50cc QMB139 4-STROKE 50mm, RACING BIG BORE CYLINDER & HEAD KIT. Sep 3, 2019 · GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 64mm Valve scooter moped parts, GY6 Engine parts for Chinese Scooter (64mm Valve Length) Get the best deals for 80cc 2 Stroke Big Bore Kit at eBay. I took careful notes on a video offered by Matt (?) at rolling wrench Denver. Replacement GY6 50cc Big Bore Cylinder Kit upgrades your scooter to 80cc. nuzlemz ttzmfy pio pubcvf wprk ymucn nsqph kdjgu cmatdq mlrdig