Ok I have asked you guys before, but Im still
not sure!
Ok Im running 340s mains, 035 pilots, and the clip in the stock position and Im still to lean!
I have a 99 Banshee, with a K&N filter with outerwears with a proflow, and a prodesign coolhead, with 22cc domes 160 LBS on both cylinders, White brothers boost bottle,
FMF topend pipes, with turban core 2 silencers, I use belray syntentic oil 32:1
with 94 octane premuim pump gas.

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-duneman-

1999 Banshee, 2000 Trailblazer(wife's)

 

I don't get it. I've basically got a similar setup and can run 310's at Glamis. Either you've got an air leak, or it's detonating from too low of an octane.

You've probably already posted this before, but what are the EXACT symptoms of it running lean?

 

I find it had to believe that your lean with that big of a jet. Make sure no air leaks, also be sure your are putting pleanty of running time on the plugs if this is how you feel it is lean it takes a good ride before the plugs start to get color

 

With the motor warmed up, I do a wide open plug check, 6th gear all shes got, and shut it off a pull the plugs, and there a white as a piece of paper! they should be a nice brown color! If it helps I live in lower Michigan, I dont know the altidute here.

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-duneman-

1999 Banshee, 2000 Trailblazer(wife's)

 

make sure the boot holding the boost bottle(if u still got that cheap azz stock one)doesnt have a leak in it...they have been known to crack

 

Ok went to Silver Lake sand Dunes 10-30-99
it was 60 degrees 340s was still to lean, And no power in 6th gear, I then put in 380s and still to lean, I tryed 100% race gas and the same thing, put was getting better, is my quad posessed?

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-duneman-

1999 Banshee, 2000 Trailblazer(wife's)

 

Not possessed. I haven't seen any divine intervention in the last thousand years of so. I sincerely believe that you have an intake leak. You gotta check the carb boots, reed blocks, base gasket, carb caps etc. There's no way that you are running lean with 380's!! That's ridiculous. Other areas might include the crank seals (are you losing tranny oil?), if they leak, usually you'd have plug fouling probs, then once the oil is gone, you'd get really lean. If all this checks out, it's professional mechanic time.

 

I agree with SANDMANBLUE 100% ,380 main jet no way, there has to be some kind of problem causing this

 

I have a similar set up with FMF Fatty's and Boyesen power reeds along with a Pro Flow filter/kit with the air box cover off. I am running 310 mains with the needle raised one notch. Runs perfect and the jetting looks good.

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Skene '00 Banshee

 

Ok guys thanks for the info, I'll have to look deeper into it.

Thank again

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-duneman-

1999 Banshee, 2000 Trailblazer(wife's)