68mm.
What is the standard bore size of a 1987 suzuki rm250 1987
70mm stock
3.740 x 3.480 / inches. Stock factory bore.
Stock 145
That is a stock bore 93-01 KX250 Piston. The part number 617M06640 is a Wiseco number. I know as I have the same bike and this is the piston kit I used. Very good piston. Do not be suckered into a single ring piston as it will not last as long.
from everything i have seen, the fronts are 4" and the backs are 6.5"
I just got my cylinder back from millennium technologies they bored the cylinder to the stock piston size that was 1.888 and honed the cylinder to 1.890.
what's the size of piston kia rio 1.5 2001
a
42 pilot 150 main for stock Keihin butterfly carb.
They came stock with a 49T or 48T rear sprocket you can choose a replacement with either a 48T, 49T, 50T, or 51T, if you have the old sprocket count the teeth on the sprocket and that tells if it is a 48T, 49T or whatever (48T = 48 teeth)
64mm