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24 vs 28

Posted: Tue Apr 14, 2009 3:28 am
by gsxrg
Just wanted to ask the experts. how much differance is there in a 24mm carb and a 28mm carb? This would be on a 72cc honda motor. Looking at top end speed. how much faster would it be?

Thanks in advance

Too Much Carb

Posted: Tue Apr 14, 2009 8:48 am
by Wheelman-111
Greetings:

The Collective requires more information about your setup to answer precisely.

See Arreche 17.5 thread. Unless you port and open/tune exhaust, adding more carb does not always add speed. Sometimes it works against you, and makes part-throttle riding unpleasant.

In my case, the 17.5 is not the limiting factor to Flash's top of 60+. There's only so much 65 or 72cc can do...

YMMV

Posted: Tue Apr 14, 2009 9:32 am
by burnt_toast
like wheelman said, depends on overall setup

Posted: Wed Apr 15, 2009 10:32 pm
by maddog
on smaller carbs you can mill the rear of the throttle slide 1ml. at a time ,thats old school.