Im wondering what kind of performance gain's i can expect by installing an aftermarket pipe,Reeds and powerbreather in my 03 ZR9.Are these Mods worth the money,and what kind of luck have rider's had after they installed them.

Have a look at this website [www.livingstonsarcticcat.com] click on serviceshop and go down to the bottom of the page, they did some testing on the zr-900. They tested pipes [singles-twins] reeds, and a number of other combo's.

I've got a black power breather for sale........mint condition.

Rick.

Fastcat, I'm running powerbreather [gutted airbox], boysen reeds, D&D clutching. I did'nt jet up to 440's like they said because of my elevation [0-2000ft]. I was happy with the sled's performance, the first thing I noticed was that you have to pull the block's out to really get a good holeshot, but the trade off is you lose some ride quality in the trails without the coupling. D&D,SLP,SPEEDWERX all have good rep's. I picked D&D, but I don't think you can go wrong with any of these shop's.

Thanks For the Info Guys,I pulled the blocks out of mine at the end of the season and was wishing i had of taken them out earlyer in the winter...awsome holeshot with them removed.Everything I've heard so far about Aftermarket gooddies has been positive so i think I'll go ahead and order them.Sled Head how much do you want for the Powerbreather??

I have added the following to my zr900 speedwerx monoblock head and pipe and clutching. v-force reeds (2's) powerbreather. I am pretty sure i went with 450 jets. Never fouled a plug. I also added a digitron e.g.t just to make sure I knew what temp it burned down at if it was going to happen. never did ran awesome all year, puts the hurt on my brothers zr800 really bad. I left the blocks in though. Oh I also added a hot dogger (LOL) but haven't really tried it out yet. The sppedwerx pipe looks awesome as it is ceramic coated so you don't have to worry about rust, I haul mine inside anyways. Kevin

Sledinfool, how did the pipe sound loud/close to stock?