BSHEE400 Posted June 6, 2008 Report Share Posted June 6, 2008 basically i have a cheetah cub kit 68mm bore, 4mil wiseco crank and a f.a.s.t head on the way from jeff at f.a.s.t. i'm currently running a trinity 2 into 1 35mm keihin and fmf gnarlys. it's for trail and mx type riding (midrange) what should i go for? cost is not an issue Quote Link to comment Share on other sites More sharing options...
2001Stroker Posted June 6, 2008 Report Share Posted June 6, 2008 I also have a 421cc motor. I have 2, 35mm Keihin's, with a Boss Racing intake with built in crossover, and it runs and burns great. Unless you ride strictly trail, ditch the 2 into 1. It's mainly for more bottom end. And, I doubt you bought a Cheetah monoblock for trails. As far as exhaust, what are your intentions with the bike? MX, GNCC, Drag? Quote Link to comment Share on other sites More sharing options...
pabansheematt Posted June 7, 2008 Report Share Posted June 7, 2008 basically i have a cheetah cub kit 68mm bore, 4mil wiseco crank and a f.a.s.t head on the way from jeff at f.a.s.t. i'm currently running a trinity 2 into 1 35mm keihin and fmf gnarlys. it's for trail and mx type riding (midrange) what should i go for? cost is not an issue As far as pipes go, CPI's your best bet. Quote Link to comment Share on other sites More sharing options...
kawiking Posted June 7, 2008 Report Share Posted June 7, 2008 jeff told me 39 pwk's for his 421 4 mills ...... for the riding u do.. id go cpi inframes!!! just call jeff..lol Quote Link to comment Share on other sites More sharing options...
BSHEE400 Posted June 7, 2008 Author Report Share Posted June 7, 2008 I also have a 421cc motor. I have 2, 35mm Keihin's, with a Boss Racing intake with built in crossover, and it runs and burns great. Unless you ride strictly trail, ditch the 2 into 1. It's mainly for more bottom end. And, I doubt you bought a Cheetah monoblock for trails. As far as exhaust, what are your intentions with the bike? MX, GNCC, Drag? i ride a bit of everything so a good all-round exhaust for this setup would be better for me than an absolute peak hp drag exhaust. but i ride mainly with 450 dirtbikes so i am a little bit tired of eating roost hence the bump up in cc. i think i will go with the dual 35s. i'm also runnin a shorter swinger but i'm only 160lbs, will i have wheelie issues Quote Link to comment Share on other sites More sharing options...
BSHEE400 Posted June 7, 2008 Author Report Share Posted June 7, 2008 jeff told me 39 pwk's for his 421 4 mills ...... for the riding u do.. id go cpi inframes!!! just call jeff..lol i didn't call jeff because of the massive time difference, i am in ireland Quote Link to comment Share on other sites More sharing options...
BSHEE400 Posted June 7, 2008 Author Report Share Posted June 7, 2008 As far as pipes go, CPI's your best bet. who sells the cpi exhaust, because whatever i buy it will have to be from someone who ships to europe Quote Link to comment Share on other sites More sharing options...
2001Stroker Posted June 7, 2008 Report Share Posted June 7, 2008 Jeff sells them. I don't know if he ships internationally, though. CPI's and Shearer pipes are mostly for top end power. If you want something for all around, I would go with either Toomey T-5's or some FMF's. I have FMF SST expansion chambers with FMF PowerCore II silencers. Good power throughout the entire range. CPI's would give me lots more top end, but I would lose bottom end. I'm debating on switching to CPI's, because of that. They are excellent for racing, though. Quote Link to comment Share on other sites More sharing options...
BSHEE400 Posted June 8, 2008 Author Report Share Posted June 8, 2008 thanks for the info Quote Link to comment Share on other sites More sharing options...
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