Right side running lean

[ahoppes89]

Im sure I could find the answer to this question in the forums but I have dial up that runs at an amazing 36k and don't feel like taking about 4 hours to find it. Anyway my right cylinder is lean as hell on top end, sure it isnt jetting, even swapped carbs completely but using the same slides and needles. Was told it was a left side crank seal but found out it wasnt when I noticed my brand new fmf gold blued to hell on the right side pipe. The right needle has a tiny little "nick" on the end of it thats barely noticeable, wondered if that could effect the top end so badly. Didnt mention that it runs pretty good til it gets warm if that helps any lol. If I left out any needed details let me know, really just wanted to know about the needle question, or if Im retarded and am going down the way wrong path. Throw some knowledge at me guys.

 

Thanks, TJ

[ahoppes89]

Its an '01 .020 over with fmf golds, stock everything other than bore. running 310 mains carbs are in sync. Any possible suggestions, new to banshees but not new to messin with bikes, just used to 2 stroke singles lol

[R. Rollins]

 

 

Sounds like one carb could be slightly clogged.

Or you need to check to ensure that both carb air fuel screws are set exactly the same.

 

 

I doubt that one carb has a larger jet than the other so Ill eliminate that now.

 

If a piece of grit fron somewhere got into the jet and limits an orifice it could cause that condition.

I would 1st check the sliders and see if they are lifting at exactly the same time when you start to push the thumb throttle down a bit. When the aitbox is removed and out of the way, then it is easier to do this.

Those carb tops should be just snug enough to begin lifting the sliders exactly at the same time.

(This is your mechanical sync...visually without a sync tool)

 

Both carbs should be adjusted the same with the set screws.

 

 

Do this then get back with us all and see if one side is still hotter than the other.

 

If so then you may have to pull the carbs and check things out, along with checking your reeds while they are out just for the piece of mind while you are at all this.

 

 

Ill just bet the carb jets are clogged on one side.

 

Dirt plays hell on these machines if the filters are not sealed properly.

Ray....