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....?