One cylinder shutting off!

[8buck]

420cc, Dune port, CPI pipes, 38mm Carbs. If you slowly bring the rpm's up to a relativley high rpm, the left cylinder will slowly get quieter then quit all together and will come back on when you hit the gas. Even while putting around the left side always sounds a little "off". At WOT, it will haul ass for the most part, then both sides will spit and sputter. Checked the plugs a WOT and they are brown. At an idle, they are still brown but very wet. Also, at an idle and putting around, the left side smokes more than the other and drips oil out the pipe.

 

That's all the details I can think of so I hope someone has an idea.

[bansheeseat$$]

Sounds like your floats are to high.

[bansheefire]

420cc, Dune port, CPI pipes, 38mm Carbs. If you slowly bring the rpm's up to a relativley high rpm, the left cylinder will slowly get quieter then quit all together and will come back on when you hit the gas. Even while putting around the left side always sounds a little "off". At WOT, it will haul ass for the most part, then both sides will spit and sputter. Checked the plugs a WOT and they are brown. At an idle, they are still brown but very wet. Also, at an idle and putting around, the left side smokes more than the other and drips oil out the pipe.

 

That's all the details I can think of so I hope someone has an idea.

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have a compression test done might be your rings

[BigRed350x]

If you have an o-ring head, check your o-rings. If its a stock head, check your head gasket. I would start at the carbs first. Clean them real good and see how it does. If you clean them and its still doing it then start swapping parts between cylinders and see if the problem jumps to the other cylinder. Start with coil wires, then reeds, carbs, intake junk, etc.

 

Was this problem just comming out of nowhere, did you recently put something new on the bike, have you ever done an actual plug chop to check jetting, give a little more background about how/shen the problem started...