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-18.5/20.5mm Larger Valves)
£34.89
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Description
About this item
- Use Large Valve Heads to Get More Power for Your GY6 139QMB 139QMA 147QMD Scooter ATV Go Kart Engine!!
- This Big Bore Rebuild Kit Comes with 18.5/20.5mm Large Valve Cylinder Head Assy (Stock is 16/18.5mm).
- Compatible with 69mm Long Valve Style Heads. If your Original Head Has 64mm Valves, Please Must Change Your Rocker Arms with The Ones in Our Kit.
- Glixal Piston Rings: DLC Wear Resistant Coating. This Coating will Also Reduce the Friction Coefficient to Protect the Cylinder Sleeve.
- Please Note: The Engine Side Cover Gasket is for a Short Case Version (8 Bolt).
- Attention: AT marking face to the piston, the 6mm small hole goes up or away from the Motor !!!
Reviews (1)
1 review for 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-18.5/20.5mm Larger Valves)
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Ella Walsh –
I’m editing my review, since I just had to teardown my engine today. The exhaust valve spring broke. So I am gonna replace the springs this weekend. Luckily nothing else was damaged. Other than that the kit has been good. The cdi box was junk (good luck finding a decent cdi box for a 50cc) and the exhaust studs are junk. So if I was doing this again, I would get better studs for the exhaust and try to get higher quality valve springs.This kit is such a great deal. Before this kit my scooter had a top speed of 38mph and going up hills it would drop down to 10mph sometimes. I put this kit on and the acceleration is awesome. I have no problem keeping up with with traffic now and even steep hills I can cruise over 30mph. I’m waiting to break in the motor before I really find my top speed, but I’ve had it up to 45mph, GPS verified so far. The new ignition system, variator weights, and clutch springs are a great bonus. Installation is easy enough.I left the engine on the bike. You’ll need a socket set with 8-10mm shallow and deep sockets, feeler gauges, torque wrench something to clean any old gasket material and screwdrivers and wrenches. A hobby mechanic should be able to complete this install in under 5 hours. Other upgrades I have done so far are a new carb with 85 main jet, free flowing air filter new variator and weights and black performance exhaust. I got a new 2000rpm clutch but I haven’t installed it yet. All ordered off Amazon!A final note. This kit will make your 49-50cc sooter 82cc not 100cc. But those 32cc will feel like 100 for sure.