252wheelieking Posted October 11, 2010 Report Share Posted October 11, 2010 I need some opinions on which exhaust kit to use with the 409 Complete Big Bore top end kit from LA Sleeve? I brought the motor from one of my family members, & the guys he brought it from use to drag race it on dirt 300ft. The set-up was: LA Sleeve 409 complete top end kit dune/drag ported 38mm pwk's w/ uni filter pods 4mm crank +10 advance timing power pro's out of frame exhaust w/ silencers +8 swingarm I wanna install this motor on my stock frame & install some inframe pipes. Im going to use the motor to ride at high speeds & on the sand dunes The set-up im thinking: LA Sleeve 409 complete top end kit dune/drag ported V Force 2 34mm PJ's w/ K&N filter pods 4mm crank +4 timing Banshee HQ choice of the exhaust kit Im just looking for opinions on this motor set-up & what inframe exhaust should I use. Quote Link to comment Share on other sites More sharing options...
06specialedition Posted October 11, 2010 Report Share Posted October 11, 2010 I would run CPI or Shearer OOF. IMO. Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted October 11, 2010 Report Share Posted October 11, 2010 FMF Fatties will work pretty good for that set up too i think. If your planing to drive it around home and fields and maby the odd trail id go with the FMF Fatties. They have a Good mid and top power range. Quote Link to comment Share on other sites More sharing options...
banshee67 Posted October 12, 2010 Report Share Posted October 12, 2010 FMF Fatties will work pretty good for that set up too i think. If your planing to drive it around home and fields and maby the odd trail id go with the FMF Fatties. They have a Good mid and top power range. would they be restrictive? concidering bore along with all of the porting and other mods? if not that would be pretty cool. being able to blow past another guy with a set of FMFs haha Quote Link to comment Share on other sites More sharing options...
252wheelieking Posted October 12, 2010 Author Report Share Posted October 12, 2010 FMF Fatties will work pretty good for that set up too i think. If your planing to drive it around home and fields and maby the odd trail id go with the FMF Fatties. They have a Good mid and top power range. I called LA Sleeve & spoke with the tech. & he recommended FMF Fatties also or CT Racing full exhaust. I asked about CPI's, Shearer's & other pipes, but he said he never tried them pipes with that set-up, so he don't know how they would perform. @ banshee67, I also thought that FMF Fatties would restrict air flow. @ EvilBanshee isnt the FMF Fatty a midrange pipe? I dont know for sure, but im thinking CPI, Shearer or R2's would be a better selection. Quote Link to comment Share on other sites More sharing options...
banshee67 Posted October 12, 2010 Report Share Posted October 12, 2010 i have a cousin who runs them sometimes, but he switches back and forth between them and some out of frames that idk what they are. but he is pretty much no where near stock so i guess. he only runs his FMFs when there are sound restrictions along with spark arrestors so idk Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 12, 2010 Report Share Posted October 12, 2010 I called LA Sleeve & spoke with the tech. & he recommended FMF Fatties also or CT Racing full exhaust. I asked about CPI's, Shearer's & other pipes, but he said he never tried them pipes with that set-up That should tell you about the R&D that L&A Sleeve put in to developing that cylinder. I would run CPI's. They are a good top end pipe. FMF's will just choak the top end and they wont make for a good midrange because the cylinder is supose to be a top end ported cylinder. You dont want top end power you have to change the cylinders and pipes. You cant force a top end cylinder to have a good midrange by putting midrange pipes on it. Quote Link to comment Share on other sites More sharing options...
06specialedition Posted October 12, 2010 Report Share Posted October 12, 2010 That should tell you about the R&D that L&A Sleeve put in to developing that cylinder. I would run CPI's. They are a good top end pipe. FMF's will just choak the top end and they wont make for a good midrange because the cylinder is supose to be a top end ported cylinder. You dont want top end power you have to change the cylinders and pipes. You cant force a top end cylinder to have a good midrange by putting midrange pipes on it. I think youd like the cpi's Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted October 13, 2010 Report Share Posted October 13, 2010 I called LA Sleeve & spoke with the tech. & he recommended FMF Fatties also or CT Racing full exhaust. I asked about CPI's, Shearer's & other pipes, but he said he never tried them pipes with that set-up, so he don't know how they would perform. @ banshee67, I also thought that FMF Fatties would restrict air flow. @ EvilBanshee isnt the FMF Fatty a midrange pipe? I dont know for sure, but im thinking CPI, Shearer or R2's would be a better selection. Ya their more of a mid range power pipe. The the top end is pretty decent on them. Their are better top end pipes out their no doubt about it. But the fatties work good from mid to top. Which i like. Quote Link to comment Share on other sites More sharing options...
252wheelieking Posted October 14, 2010 Author Report Share Posted October 14, 2010 That should tell you about the R&D that L&A Sleeve put in to developing that cylinder. I would run CPI's. They are a good top end pipe. FMF's will just choak the top end and they wont make for a good midrange because the cylinder is supose to be a top end ported cylinder. You dont want top end power you have to change the cylinders and pipes. You cant force a top end cylinder to have a good midrange by putting midrange pipes on it. @jbooker82-that do make alot of sense. Im just gonna bolt my cpi's on it & see how it does. Quote Link to comment Share on other sites More sharing options...
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