Another Stutterer

[darrsi]

Just to clarify, when the bike is cold, if you go full throttle it will go up the rev range fine with no stuttering? But once the bike is warm it will stutter as soon as you give it full throttle? Are you using choke when it's cold? If not put some choke on when its cold and then give it full throttle. If it stutters, then this may point towards over fuelling or not enough air  as the problem when the engine is up to temperature. Also you can test this again by seeing if putting choke on when the bike is hot makes the stutter worse. Let us know what happens when you try this. Cheers.

Stuttering, or bogging down can be caused by too much air!
Happened to my bike when one of the carb rubbers folded in on itself when my mechanic refitted them, and number 3 inlet rubber was letting air in.
Everytime i went to overtake or generally give the throttle a bit of welly it would splutter all over the place and bog down.
I had to have the bike in elsewhere to get them to look at my carbs and they showed me what they found.