39mm carb too much??? Help!

[83-250r]

:wonderingHello I was wondering if a 39mm carb on a 83 250r is too much carb? The bike is stock except DG head pipe and silencer. Need help thanks!

[RubberSalt]

Yup, Before you can effectively flow all that., you need to have it ported.

[Daddio]

A 34 would be good on a stock engine. My son has a 285cc 83 250r that has a mild port job, boysen reeds and a pipe. It has a 35mm pwk on it and it is stupid fast and has very good bottom end also.
He runs a 39mm on his drag ported 84 300r. It's just insane!:naughty:

[250rmanfmf]

Yea, it a little big for what you got. Get your cylinder ported and that will make a huge difference.