jmiller Posted May 20, 2009 Report Posted May 20, 2009 I have a banshee with a fast dune port, wiesco pistons .10 over +4 timing cool head 20cc domes 135 psi. Stock carbs reeds ect. Running PowerMist 36:1 ratio with 93 octane fuel. Heres the deal... I had a set of Toomey T5 pipes with a full airbox with 16 uni circle filters and a pro-design 2 stage filter with a plate. Ran 310 mains and stock pilots 1.5 turns out in January Toomey Needle. Ran perfect... Got a set of shearer small bores because i was told they would perform better on the setup i have and also got some k&n pod filters for stock carbs. Its about 80 degrees here in Jersey. It has no power in 5th and 6th gear and breaks up very badly and has random burps across the powerband. Will not wind out clearly. Ive tryed different cdi boxes different plugs every main jet from a 360 to a 310 stock pilots and 27.5 pilots all different settings and the toomey needle and the stock needle in all different settings. Ive tryed the k and n with and without the prefilters Still no better. Please help.. Im outta ideas. :PPPPP Quote
VegasJeff Posted May 22, 2009 Report Posted May 22, 2009 I have a banshee with a fast dune port, wiesco pistons .10 over +4 timing cool head 20cc domes 135 psi. Stock carbs reeds ect. Running PowerMist 36:1 ratio with 93 octane fuel. Heres the deal... I had a set of Toomey T5 pipes with a full airbox with 16 uni circle filters and a pro-design 2 stage filter with a plate. Ran 310 mains and stock pilots 1.5 turns out in January Toomey Needle. Ran perfect... Got a set of shearer small bores because i was told they would perform better on the setup i have and also got some k&n pod filters for stock carbs. Its about 80 degrees here in Jersey. It has no power in 5th and 6th gear and breaks up very badly and has random burps across the powerband. Will not wind out clearly. Ive tryed different cdi boxes different plugs every main jet from a 360 to a 310 stock pilots and 27.5 pilots all different settings and the toomey needle and the stock needle in all different settings. Ive tryed the k and n with and without the prefilters Still no better. Please help.. Im outta ideas. :PPPPP Maybe its your pick up gap,sparkplug caps, spark plug gap or loose little caps on top of your spark plugs? Quote
philip Posted June 2, 2009 Report Posted June 2, 2009 Maybe its your pick up gap,sparkplug caps, spark plug gap or loose little caps on top of your spark plugs? Quote
dajogejr Posted June 2, 2009 Report Posted June 2, 2009 If you went from 310 to 360 main and it didn't change anything, start looking at the ignition components. Also, did you ever leak down test the motor? I'm sure it ran fine before...but, test it anywho... Quote
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