310 kit

[my250r87]

i have a 250r with a stock motor. ers 5 pipe, i was thinking about putting a esr 310 kit with a 38mm carb on it. about how much of a diffrenec will it make. thank you.

[Jester]

I'll tell you when I get mine put on and broken in... should be next weekend.

[jcas]

Huge. I have an ESR drag-ported 310. I use the 38mm a/s, 13/38 gearing, and low compression dome for screwing around. For the dunes, the setup is high compression dome, 40.5 keihn, and 13/39 gearing. I use 110 octane all the time. You will give the 450's fits with either setup.