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View Full Version : 39mm carb too much??? Help!



83-250r
05-14-2011, 02:56 AM
: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
05-14-2011, 04:27 AM
Yup, Before you can effectively flow all that., you need to have it ported.

Daddio
05-14-2011, 08:55 AM
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
05-14-2011, 11:35 AM
Yea, it a little big for what you got. Get your cylinder ported and that will make a huge difference.