Jetting For Thunder Pipes

[coolhuh]

I have a 2003 banshee with thunder pipes, clamp on K&N, lightened flywheel, degree key, trinity head with 21cc domes, 50:1 premix and ride in Glamis area. I have 30 pilots and 320 mains but at wot it boggs, should I try 340-350 mains next?? What about needle position, it is stock needles in stock position right now??

Thanks

[BenBB]

If it bogs at WOT the mains may be too rich, if you're certain it's rich try dropping to 310 mains. It's not unlikely since you're running 50:1, but I would make sure it's rich before going leaner; you can try warming it up and popping the choke out to the first notch; if it bogs even worse you know the mains are rich, if it improves then it's lean and you would be correct in trying larger 340 mains. Good luck.

[BenBB]

Forgot to add, I'd leave the needle where it's at for now until you dial in the mains. Then if there's any bog or hesitation between about 1/4 and 3/4 throttle you can adjust the needle clip position as necessary...

[Banchetta]

I agree w/ Ben. Leave the needles for now and I'd run it wot in 6th gear for 5 seconds, shut it down, coast to a stop and pull the plugs... If they are black then go leaner, If they are tan or white then go richer....Another way is to put some duct tape on the filters and cover them about half way....If it runs better than your too lean on the mains, if it runs worse, then your too rich on the mains..