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Psi pipes, good or bad | Snowmobile World
https://www.snowmobileworld.com/threads/psi-pipes-good-or-bad.3820/
If you are a serious racer, then purchase the appropriate accessories for what you want to acheive and remove the comprimise. If you want a drag sled, forget all about midrange and low end power and buy pipes that spin at 8500+ rpm with an increase in hp in a small area. But remember, you will have a terible day on the trail with this set-up.
FS: PSI Racing twin pipes for 500 Polaris Indy | SnoWest Forums
https://www.snowest.com/forum/threads/fs-psi-racing-twin-pipes-for-500-polaris-indy.163752/
FS: PSI Racing twin pipes for 500 Polaris Indy. I have a set of PSI pipes that will fit the Polaris 500 Indy snowmobile from 1989-on. This exhaust is for the older Indy sleds with the 488 Fuji engine, NOT the new liberty 500. They're located in …
PSI Racing exhaust. | The Dirt Bike | Motocross | Supercross …
https://dirtrider.net/forums3/threads/psi-racing-exhaust.179538/
PSI makes a good pipe. There is an adjustment bolt on each side of the powervalve. It is a bolt with an eccentric buil into it to adjust the power valve . Pick up a shop manual for more details .. MX-Tech Suspension Agent www.HeavyDutyRacing. net Post Reply Post reply Similar Topics C KTM 50 sx sr will only idle at high rpm coupleofyzs Sep 10, 2008
Home - ThumperTalk
https://thumpertalk.com/forums/topic/1255213-psi-racing-pipe/
PSI Engines
http://psipowerinc.com/34696.htm
3 - Stage V Porting By PSI's Master Porters $600.00 3 - VEP's (Variable Exhaust Ports) Patented $900.00 1 - "Dial-A-Dome" Head -Patented $750.00 3 - 100mm PSI Piston & Ring Kits (Coated) $585.00 1 - Production Exhaust System & Silencers $1200.00 1 - Complete Ignition System - Modified to Fit $1500.00
jetting for psi pipes and clutching | Snowmobile Fanatics
https://www.snowmobilefanatics.com/threads/jetting-for-psi-pipes-and-clutching.109664/
it is a 88 indy 650 that it ported and polished and its bored out .020 on center and pto cylendar and .040 on mag side. im running three individual psi racing pipes and i currently am using my stock clutching and my stock 94 xlt secondary with the 1-5 adjustment on setting 1. and i am running a camoplast preditor 121 fully picked track with ...
Where are they now...PSI - Moto-Related - Vital MX
https://www.vitalmx.com/forums/Moto-Related,20/Where-are-they-now-PSI,1222628
Those SOB's still owe me a pipe. I bought a brand new 2001 CR250 and let them take it to build a pipe for it so they could start getting back into the mx pipe business. They told me they would put on a street tire so they could get accurate HP numbers and not trash my tire.
Flashback: The Snowmobile Performance Shops Of The 1990s
https://snowgoer.com/latest-news/flashback-the-snowmobile-performance-shops-of-the-1990s/16962/
PSI Performance, Bruce Kahlhammer, Wild Rose, Wisconsin. Race Logic, John Caldwell, Leroy, Michigan ... and porting.once a set of pipes were designed the profit margin per set was high.porting was and is a talent and knowledge art which was high margin as well.the first thing we did as polaris liquid triple owners was remove the stock exhaust ...
PSI MX and ATV
http://www.psipowerinc.com/265cc.htm
The Genesis Honda 4-Trax 265 is a bolt-on top end kit for a serious MX, Flattrack or TT racer. It has gobs of power from bottom to top due to our unique Genesis cylinder designs that offer a truly awesome 9 port layout. This kit is at 265cc because the class allows an .080 oversize piston in it which is 68mm on a nikasil cylinder bore.
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