hispd, the heads are around 260 bucks for your mxz 800. you should expect good hp gains, what ive heard from people that have them on 800's, the sled is noticeably faster they said. i would expect you might have to re-jet a little, but it should come instructions if you need to, and re-clutching is most likely too. but the heads do come with instructions.
hispd - I see that you have a Mach. RK Tech now offers a
head for the Rotax triples. Check out an earlier post by
me and you can see the difference in the combustion chambers
between the stock, U.B. and RK Tech. There are also some
pictures of the finished product which look very impressive.
Kelsey is also talking about offering custom covers for
these heads as well.
you would start at 450's then work your way down,depends on elevation and temps,but many are running 420's ,i only went to 440's because i do ride at -35c.i know its sounds unreal but its true,if you order a head kelsey will aim you in the right direction,its a very good mod worth the money
I called some place to see if i could order one, but i havent ordered it yet. they said you dont have to jet for it, but i think im going to, i thought that you always should when you get an engine mod. thnx for the help on jet sizes panteraone.
panteraone, i do have a mxz600, but the jets are the same that are in 800, but you are right, maybe jetting down will be a little diff. i called tri-sports in pennsylvania bcuz ive got a friend that works there that can get me a discount on the rk tek head.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, accessories, and more!