This kit fits all AR80's and would you believe it the AR50 as well.
Now the 80cc engine has a 6 speed box, the 50cc has a 5 speed but they are the same in all other respects and will fit in either bike.
The AR50 runs between 85 - 94
The AR80 runs between 85 - 90
Both bikes have the same stroke 41.6mm.
The new bore size is 53mm giving 91.8cc for both engines.
49cc & 78.47cc ............ quite an increase.
You may have to re-jet but that will depend on your exhaust. Check the engine power through the rev range whilst on the road and stop the engine at certain constant speeds using the kill switch and check the plug colour. I can supply carb jets at £3.00 each+ postage where applicable or buy them now and the postage is the free with this package.
This kit will make a big difference to both bikes.
The kit includes the barrel, piston, pin, clips and the piston rings, gaskets and head studs.
The kit is made in Taiwan by a well known piston manufacturer whose products end up in many different branded boxes.
The top ring is a standard keystone type, which is much more robust than the dykes type that is found on some other kits. The overall quality is excellent. Set it up right and you will get good power and great reliability.
I can also supply gaskets, piston kits in oversizes and piston ring sets.
