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Old May 28th, 2023, 05:46 PM   #15
Bob KellyIII
Retired motorcycle Mc.
 
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Name: Robert
Location: Weed, California.
Join Date: Jul 2021

Motorcycle(s): 2012 Kawasaki Ninja 250R, 2021 CSC TT250, 1977 Triumph Bonneville 750cc,2001 Honda XR650L.

Posts: A lot.
Same Exact problem I ran into after having Gordon clean my carbs
...however we changed the main jets to 95's and put 2 shims under the needles
and I opened the fuel/air mixture screws to somewhere around 3 to 3.5 turns out and now it runs....
when it is cold it still has a slight bog around 4,500 to 6,000 RPM
but when it warms up that bog goes away....
this is totally bazaar and in my mind should not happen in any way or form
as it is Mechanical and it can't do that... but it does.... what went bad to cause this is so far UNKNOWN to me.... if you put it all back to stock you would expect it to run like a stock bike but it will not take any throttle then ...really strange !
I went as far as isolating all the smogg **** on the bike and had no change at all. what seemed to make the biggest difference is the shims under the needle jets ( remember the left and right needles are different from each other, don't mix them up !)
... if you are lucky enough to find the culprit please POST it as this has been cropping up all over the place.... a problem that should not be occurring, but does.... and I for one want to know what causes it.
Bob......
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