here`s the situation, ive got a gp with a jb tuned muggy 186, 28mm del orto breathing through a foam filter and out through a jl3 curly. It was dynoed at 17.4bhp at 6569rpm and 14.2 ft/lb @ 6280rpm, but i melted a piston almost imediately, so i retarded the ignition, up jetted and didnt ride it much. Now although its not as sharp it still flies but it now seems over geared (tv175, 15x46), and especially the gap between third and forth is hard to span.
my options are different (lower) gearbox, sadly a 5 speed is out, or somehow widen the power band, any ideas without loosing too much more umph or spending too much, would an augusto type device help for instance?
want it all!
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dave wheeler
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Doom Patrol
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The exhaust is something you could look at too. It could be it's pushed the power too high up the range and is struggling to find it..... Or something like that. 
Last edited by Doom Patrol on Sat Sep 15, 2012 6:01 pm, edited 1 time in total.
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Muttley McLadd
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Easy. Take top end off.. Sell it.. replace it with a GT top end.
CakeAndArseParty
