63mm big bore kit and crank/cam ????? By mmm1966 (Read 996 times)

[mmm1966]

hi everyone,
more newbe questions here.
going to install big bore kit later this winter. what size do u generally bore case to for tolerance on 63mm cylinder ?
also what brand or kit is best to use?
next question is what mm stroke crank is best to use? a 2mm or 4mm or ? i don't want to overkill too much. is their a a manual or web site that has good stuff on this like compresion ratios and excetra ?
while i am into the million questions what type cams are out there and whats best to use ?
sorry for all the questions but i am still in learning mode

[sprocket]

I wouldn't put a stroker kit in.. go 4 valve head and piston.. far more power for the buck...

www.provoscooter.com/scooters/gy6/ruima-4-valve-racing-cylinder-head-gy6.html

Not sure on the tolerances on a 63mm, but NCY makes a case bore head specifically for this purpose.