Yamaha Banshee ATV Jetting?

  • Thread starter Thread starter rockisland
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rockisland

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I have a 04 Yamaha Banshee 350 twin 2 stroke ATV. Starts 2-3 kicks and runs good slow and meduim speeds but when the powerband hits it seems like the throttle sticks or the power won't stop unless you turn the kill switch on. It only does it when it is cold-meduim warmed up and once it gets hot it stops and runs fine. Is it jetted wrong? Is the jetting too lean? I bought it this way and it has Toomey T-6s pipes and clamp-on K&Ns. Any advice would be appreciated. Thank you!
 
So is it good from 1st thru 3rd shift but then bogs in 4th-6th??

If that the case then its one of three things

1. If it bogs and your spark plug is black and/or wet, use a leaner (smaller) main jet.

2.If performance is very crisp but the motor is popping and the plug is white, go richer (bigger)

BTW: Your plug should be a very light, dry tan color.

3. make sure the choke tube is connected (stock carbs only)

good luck!!
 
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