any one using quiet pipes
Posted September 18, 2001 - 05:32 PM
Posted September 19, 2001 - 02:03 AM
I have a difficult time believing you can get any appreciable power increase with an exhaust rated at the same decible output. I do assume it is lighter than OEM though.
'99 WZ/YR (you choose!) with ALL YZ mods, de-octopused, DSP Doug Henry airbox w/ velocity stack, FMF PowerBomb header, Stroker SX-1 silencer, SS front brake line, OEM YZ tank, IMS YZ seat.
Posted September 19, 2001 - 03:50 AM
Posted September 19, 2001 - 03:59 AM
Use a stock (used) YZ pipe (performance, cheap, well-made, and light) for most of my riding. Then I used a utility sink removal drain cover to restrict the pipe when I wanted to be quiet. The restrictor was about $2, far less than any sort of vortip/thumper insert.
I use the WB bros tapered pipe-and it's higher than stock. Good for keeping it out of harms way, bad for tank clearance. I haven't tried any other tank with this pipe. I understand the acerbis is a tight fit, not sure about IMS.
Posted September 19, 2001 - 09:04 PM
I have an FMF Q on my ’01 YZ, I wouldn’t have bothered at all with the stock YZ can being so good but I needed a USFS S/A and the PC header will NOT clear an Acerbis tank petcock, besides that thing is incredibly loud. During a highly unscientific noise comparison between my bike (w/ the FMF Q) and my friends ’01 520 EXC (bone stock) we decided that mine was louder, but not by a whole lot. So the Q thing is definitely noticeably quieter than stock.
As for power with that huge Q thing on there (easily as large as the stock KTM silencer), it revs just as well, maybe even slightly better, than with the stock can but I think it stole a little lower mid.
Hope this helps.
Posted September 19, 2001 - 09:08 PM
I also run the IMS 3.4 gallon tank, and heating up the petcock is an issue (as is burning your pants leg). I solved both of these problems by wrapping some header tape around the pipe under the petcock, then covering it up with a Go Products aluminum heat shield so it still looks nice.
Posted September 20, 2001 - 06:53 AM
I would like to know if anyone has compared the Canadian pipe to the quiet FMF or Big Gun pipes in terms of power and weight. Is it worth replacing?