Hi, I have been lurking on these forums for awhile, and decided to join. I have been building and tuning snowmobiles for years, and decide to do some work to the quad. I have a '99 Polaris sport 400. I bought a used Aaen top end pipe. I haven't put it on yet, because I know it will have to be clutched for the pipe. I am looking for some clutching recommendations to get me close. The Sport has a Wiseco piston and some minor port cleanup work. (by me) I cut the head .020" and set the squish to .080", otherwise the machine is stock. Are there any other low budget mods I can do myself? (airbox,timing etc.) I know I will have to jet up w the pipe. I will start a couple of sizes higher, and go from there. I will install a digital EGT from my sled to monitor exhaust temps. Thanks in advance, Brad

 

im a polaris man go hot seats or dont buy one

 

I would like to know if anyone has the Aaen pipe and clutch kit, and what weights/spring do you have? I think the pipe is tuned for 6500RPM. I could just buy the Aaen clutch kit, but I have tons of primary springs and weights from sleds, and am trying to get in the ballpark and save some money. anyone??

 

With that pipe try a brown primary ,stock S55 weights,and either Aaen blue or HPD violet secondary.But really you need to tach it to get the rpms into the range of the pipe.I cant remember what that pipe is want to say 6600-6800.Jetting should be in the 260-280 range

 

<div class="FTQUOTE"><begin quote>Originally posted by: ftwflh

With that pipe try a brown primary ,stock S55 weights,and either Aaen blue or HPD violet secondary.But really you need to tach it to get the rpms into the range of the pipe.I cant remember what that pipe is want to say 6600-6800.Jetting should be in the 260-280 range</end quote></div>

Thank you very much, that is the kind of info I was looking for.