experts help me please

[IRISH-RACER-14]

so i got a race 250x motor..and i have a 300ex. i got the carb and boot for that motor so what else do i need?250x electrical?

[ZSNOW]

250x electrical.

[IRISH-RACER-14]

so i want the most i can get out of it without race fuel?

[m0t0xk1d]

why dont you race the 300? put more money into that and it will be better that is unless you bore the 250 to be a 300 then you got a 300ex with a kickstarter but why dont you just race the 300?

[shaungray89]

300 and 250 are the same bore you would have to stroke the 250 for the cc increase just to let you know

[IRISH-RACER-14]

Originally posted by shaungray89
300 and 250 are the same bore you would have to stroke the 250 for the cc increase just to let you know my dad wont let me mess with the 300ex engine...its 2 knew he says..so i gotta buy a new motor...i was thinking if i got a 300ex or 25x bottom end and work on from there? which woulde be better

[ZSNOW]

250x tranny isn't as strong and the stock cranks aren't as good, they are faster than a 300 motor built, but take way more cash, and will never be as strong as a good 300 motor without being built on racegas.