yyz Posted May 4, 2006 Report Share Posted May 4, 2006 (edited) ok... long story short... bought a set of inframe small-bore cpi's 6 weeks ago which had chipped chrome, pitted metal, and scratches and tool marks in the silencers. i complained to cpi and was told that these are racing pipes not show quality pipes... (i guess they can't be both, right)... well eventually i did get them exchanged. so i have been having problems with the right cylinder not putting out as much pressure and it has been dropping on and off now and again while riding under the powerband. last night i removed the pipes to inspect the cylinders and i found the input into the right stinger was 1/16" smaller diameter than the left, due to their crappy workmanship... they over crimped the metal or something when it was assembled and welded... so maybe this is no biggie, but you spend all that money on a drag port, crank, etc., and getting everything even from cylinder to cylinder and then your pipes aren't even the same diameter through and through... the left's diameter was 7/8" and the right's was 13/16"... so what do you think?... could this cause some weird backpressure or wave, or loss of vaccuum on the right intake at lower rpm's?... could it be forcing the balance tube to perform extra duty keeping the cylinders evened out? makes ya wonder... guess i will have to "port" and "blueprint" my pipes next (dremel grinder)... either that or send them back to cpi to have the left welded shut a little so it matches the right... i mean, fuck performance right? any advice or comment would be great... thanks.... oh, and thanks to you too cpi for doing such a great job building my "race pipes". yyz Edited May 4, 2006 by yyz Quote Link to comment Share on other sites More sharing options...
Hilarious Posted May 4, 2006 Report Share Posted May 4, 2006 ok... long story short... bought a set of inframe small-bore cpi's 6 weeks ago which had chipped chrome, pitted metal, and scratches and tool marks in the silencers. i complained to cpi and was told that these are racing pipes not show quality pipes... (i guess they can't be both, right)... well eventually i did get them exchanged. so i have been having problems with the right cylinder not putting out as much pressure and it has been dropping on and off now and again while riding under the powerband. last night i removed the pipes to inspect the cylinders and i found the input into the right stinger was 1/16" smaller diameter than the left, due to their crappy workmanship... they over crimped the metal or something when it was assembled and welded... so maybe this is no biggie, but you spend all that money on a drag port, crank, etc., and getting everything even from cylinder to cylinder and then your pipes aren't even the same diameter through and through... the left's diameter was 7/8" and the right's was 13/16"... so what do you think?... could this cause some weird backpressure or wave, or loss of vaccuum on the right intake at lower rpm's?... could it be forcing the balance tube to perform extra duty keeping the cylinders evened out? makes ya wonder... guess i will have to "port" and "blueprint" my pipes next (dremel grinder)... either that or send them back to cpi to have the left welded shut a little so it matches the right... i mean, fuck performance right? any advice or comment would be great... thanks.... oh, and thanks to you too cpi for doing such a great job building my "race pipes". yyz 511880[/snapback] Where did you get your pipes? I got mines from some dude named PowerYamaha off ebay and he told me the same shit. They are built for performance not looks. If that is the case, why the hell do they put chrome on them. I thought the chrome plating was mainly for looks and not just low maintenance protection from rust. As for the problems you're having, i hadnt got a clue. But seems to me, the outlets should be the same size. A smaller opening means more restriction. Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted May 4, 2006 Report Share Posted May 4, 2006 Send that POS set of pipes back to CPI, and raise Hell daily, until you get your new ones back. Tell them that you are going to turn them in to the BBB, and the attorney general, from the state you live in, for making and selling a POS product. I had trouble with a set of silencers, and had to send them back, so I could get them replaced. Seems like all that CPI is interested in anymore, is quantity, and not quality. Here's their phone number (801) 829-5877. Quote Link to comment Share on other sites More sharing options...
yyz Posted May 4, 2006 Author Report Share Posted May 4, 2006 originally got them from power yamaha off of ebay but they wanted me to pay shipping both ways to exchange them to them (48.00 bucks or so)... so then i called cpi, and had to pretty much beg to return them... i paid the shipping to and they at least paid the shipping back... that is when the told me they were race pipes, not show pipes, blah, blah, blah, etc. so this set i got now cosmetically is pretty nice, but like i posted, has dis-similar stinger inlets... i am going to fix these myself just to avoid the hassle, but if this fixes my problem, i am definately calling cpi and will be screaming... either way, i might just keep bumping this post for a few so that people know what's up. yyz Quote Link to comment Share on other sites More sharing options...
FasterThanU90 Posted May 4, 2006 Report Share Posted May 4, 2006 Thats sum bullshit id make them refund ALL my money including shipping and go with a different brand of pipes thats fucking lame Quote Link to comment Share on other sites More sharing options...
ellison445 Posted May 4, 2006 Report Share Posted May 4, 2006 I just picked up a set and Mine are perfect and I got them from the same guys. Quote Link to comment Share on other sites More sharing options...
yyz Posted May 4, 2006 Author Report Share Posted May 4, 2006 I just picked up a set and Mine are perfect and I got them from the same guys. 511973[/snapback] yeah, so are the ones my son just got... they had alot of complaints so power yamaha had their inventory re-chromed... my son's are near perfect and the chrome looks more like toomey's... so the one's you got are more than likely not cpi's chrome... i know there is a good difference between the two pairs we have here... mine and my sons. btw... my son's right stinger tube isn't small like mine is either. yyz Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted May 4, 2006 Report Share Posted May 4, 2006 Seems like the bottom line is, CPI needs to implement some quality control, so they don't have such a large amount of variations, in their pipes and silencers. Quote Link to comment Share on other sites More sharing options...
hellride96 Posted May 4, 2006 Report Share Posted May 4, 2006 got mine from power also, mine are great Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted May 4, 2006 Report Share Posted May 4, 2006 I was just about to buy a set of CPI's cause the chrome on shearers sucks, what can I do to make sure I get a good set? Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted May 4, 2006 Report Share Posted May 4, 2006 I was just about to buy a set of CPI's cause the chrome on shearers sucks, what can I do to make sure I get a good set? 512061[/snapback] Good question, and if I knew the answer, I wouldn't have had trouble with mine. I guess try calling CPI directly, and mention to them, that their quality is shit, and see if they will make any guarantees. If I would have known that I was going to have problems ahead of time, I would have bought Shearer's, Rockets, GRR's, or anything but CPI's. Quote Link to comment Share on other sites More sharing options...
sand rocket Posted May 5, 2006 Report Share Posted May 5, 2006 I agree on the shitty quality. Mine seem to be ok. there is an issue with my silencers not mounting at the same highth. Quote Link to comment Share on other sites More sharing options...
ellison445 Posted May 5, 2006 Report Share Posted May 5, 2006 The same what? I agree on the shitty quality. Mine seem to be ok. there is an issue with my silencers not mounting at the same highth. 512127[/snapback] Quote Link to comment Share on other sites More sharing options...
Hilarious Posted May 5, 2006 Report Share Posted May 5, 2006 I agree on the shitty quality. Mine seem to be ok. there is an issue with my silencers not mounting at the same highth. 512127[/snapback] Are yours this cock-eyed or worse? VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted May 5, 2006 Report Share Posted May 5, 2006 Are yours this cock-eyed or worse?VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV 512149[/snapback] That is what my first set of silencers looked like, but I sent them back, and got a new set. The installation of the second set looks better, but it still involved some adjusting, and a lot of blood, sweat, and cussing. Quote Link to comment Share on other sites More sharing options...
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