Originally Posted by
CarCrazy
Picked up a .21 GRP tonight, looks good. I want to pop a Ceramic rear bearing in it but cant find the bearing size anywhere.. Anyone know what the size is?
Also the porting isn't so hot, so I'll probably port, smooth, and taper the sleeve. The back of the crank could use a knife edge job too, its a bit blocky and heavy. Once thats done this baby should sing for about 11 minutes!
Rear Bearing Size....?
smoothing the sleeve will not help the motor...exterior sleeve work adds zero power to these motors........... I would not touch the crank either........ my bet is you would lose HP not gain HP with the mods your propose.........Do not cut the sleeve, its a urban myth that sleeve mods add power !!!!