engine info

[j450rking]

i am new to 250r engines and 2 strokes so bear with me here. i need to know the stock bore, stroke and comp of all the engines. and if somone could tell me what the first bore kit after stock bore is and what is the highest comp i can run with 93 octan pump gas. thanks

[j450rking]

oh and dose anybody know the stock hp on the 250r engines?

[EXtreme-]

http://www.pistons-online.com/motorcycle2.asp?br=Honda&st=54&end=55

[C-LEIGH RACING]

That parts site right handy, gives some info as you can see for piston sizes, bore & stroke & even cc size.

Compression, you can use prem pump gas long as you keep the psi under 180lbs. Might could cheat just a little up to 190lbs using prem pump, but you better be using a big main jet & make sure the ignition timmings not addvanced any.
Neil

[j450rking]

ok great thanks guys