TORQUEDFORD Posted January 25, 2012 Report Share Posted January 25, 2012 It is all built, Serval 4 mil.....now I need to buy pipes. Which ones. I have 35mm carbs. Sand dune riding only. I thnk the CPI pipes look kind of cobbled and the Shearers dont fit good from what I have read. Or are they close enough it won't matter anyway? I am a heavier rider i.e. 250#s Quote Link to comment Share on other sites More sharing options...
Infamous039 Posted January 26, 2012 Report Share Posted January 26, 2012 I have shearers on my bike and I have no fitment issue. My vote is for shearers. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted January 26, 2012 Report Share Posted January 26, 2012 Someone had some decent rockets for sale the other day. I'd look into that option too Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted January 26, 2012 Report Share Posted January 26, 2012 I've owned both brands and the fitment was not the best on either. But neither one was worse than the other in that regard. Now as for power......... My motor was/now is a 472/492 Cheetah. My motor liked the Shearers to the tune of 14 more HP over the CPI's and it's torque curve was as good in the lower RPM's as the CPI's. So needless to say, I'm a big fan of the Shearers. For your motor ....I would pick the Shearer Small Bores. They were designd for the 421 cub. I know the port timings are lower with the serval, But I think that pipe will best fit your needs. My two cents........Shearer Small Bores. Quote Link to comment Share on other sites More sharing options...
andrew3160 Posted January 26, 2012 Report Share Posted January 26, 2012 I run shearers with no issues. Coupelx is selling some original rockets. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted January 26, 2012 Report Share Posted January 26, 2012 My rockets fit perfectly and they run more hp than CPI according to reputable sources Quote Link to comment Share on other sites More sharing options...
Coupelx Posted January 26, 2012 Report Share Posted January 26, 2012 I run shearers with no issues. Coupelx is selling some original rockets. they are actually GRR inframes. NYUK said they are pretty much like an original rocket. I went for a spin with them last fall on my stock stroke dune port and they come on earlier than my r2's and pretty smooth. as far as fitment. they fit like old rockets and most other banshee pipes- not for shit. Quote Link to comment Share on other sites More sharing options...
lms1977 Posted January 26, 2012 Report Share Posted January 26, 2012 I run the shearers and love them Quote Link to comment Share on other sites More sharing options...
Nutwood 472 Posted January 26, 2012 Report Share Posted January 26, 2012 I run shearers on my 421 serval and have 35s and they work great together Quote Link to comment Share on other sites More sharing options...
camatv Posted January 27, 2012 Report Share Posted January 27, 2012 shears. no other pipe works for crap on the serval Quote Link to comment Share on other sites More sharing options...
TORQUEDFORD Posted January 30, 2012 Author Report Share Posted January 30, 2012 Thanks for the replies. I bought the Shearers. They are a tight fit on there with my carbs/filters and intake I got. Look pretty sweet and seems to run good but only had it in the neighborhood so far. Quote Link to comment Share on other sites More sharing options...
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