18-06-13, 05:05 PM
(18-06-13, 04:13 PM)darrsi link Wrote: [quote author=Dcock link=topic=8360.msg82346#msg82346 date=1371563303]Stuttering, or bogging down can be caused by too much air!
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.
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.
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yeah true too lean mixture will do that as well. If that is case here, when he puts the choke on during the warm ride it should make the stuttering less noticeable as he would be increasing the fuel to air mixture. Either way wacking the choke on will hopefully show us something.. or nothing maybe.. Although if it was too lean that would cause idle hunting and make it difficult to start as well? Which I don't think he has mentioned. It will be interesting to see what's causing this!