im looking for a little more out of my mach z 809 i got a leaky base gasket so im changing that and while its down i thought for 89.00 what the heck to have it ported its big bucks and i know what im doing on a sled pretty good how hard can it be to do it myself right?.but is it worth all the time and money???i hear on the 809 you need to cut a square port in the bottom of you jug if thats a good idea why has skidoo not did it????i need a anwser from some one who has used it good or bad???and what about jetting its a bone stocker with 310 mains in it leave it and port it or what?? i know its factory fat now and advice would be helpful

I used the kit on a '01 mxz 700. I was amazed at how much material was removed. I used a black n decker style Dremel with the small attatchment worked well for getting into all the ports. It's not all that bad but it takes a long, long time. you want to remove very small amounts of material, then when done chamfer the ports so you don't catch a ring. The sled is now running and ready to go. My first ride will probally be tomorrow, I will post results. As far as jetting I was running 520's before the porting, and just to be on the safe side I put in 540's and I will check piston wash and jet down until it's right. Another Mod you should do to make use of the added power is increase the pin weight on the primary. I bought a kit from Goodwin around $24.00. Once i get the jetting down I will start adding weight until I get it down.