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After more investigation it turns out that the cat engine and mountain max engine are both 794cc. That's enough evidence for me

Are we sure that the 800 is IN FACT the cat motor? Please post facts to support your reply

I put a 20t gear in my 2010 xtx 1.75 and it worked great in the mountains. You will want to change the weights to make it rev properly at elevation. Without the weight change my sled only revved to about 7000rpm at 6000'

I bought my super this january from a dealer in maine. I got an awesome deal which is why i went with the super. If i had to do it again i would go turbo. The reason i say this is because you can ride a turbo anywhere without changing any settings. To change altitude with a super you need to...

Yes that would be inversely proportionate to dropping a tooth. Wow that was a mouthful. I wouldn't say nytros are finnicky to gear changes.

I went to a 20t. I love it. If top end isn't a big deal, do it for sure

After 2000 miles with my Skinz Ultra Q muffler it has cracked. Bad. I emailed Skinz but because it's over a year old they won't warranty it. I bought it for $230 and now they are $350. I love the sound but not really interested in buying from them again. What should I buy now?

Oil is oil. Its fresh. Give er man

No idea. Matt said should be 7-8 lbs at 10000 feet

He quoted me $100. The taper locks are $13.

I really need to stop posting and just call Matt@MPI. He answered all my questions. He recommended 28t bottom and 26t top pulleys for my supercharger. This should compensate for clutching also. I went ahead and purchased the pulleys from Matt and anticipate their arrival. Thanks Matt!!

I have an mpi 180 supercharged nytro xtx and I'm going to Cooke City in March. My sled has a 1.75 backcountry track and the 8hg weights from mpi What clutching should I do for altitudes of 8000 to 10000 feet?

I put a tee in the line feeding the gems controller. The pic is hard to tell because of how I mounted it.

Just a heads up. I had them on my attak and hated them. They force all of the snow up into your face.

I finally finished my sea level s/c install and took it for a ride. I now have clutch engagement at 2000 rpm. (2010 xtx) I have a blue silver blue (stock) spring in the primary with the yamaha/mpi weights and rivets that came with the yamaha kit. 8hg weights and steel 17.2 rivets in all holes...

I ran my wiring beside the tank with the factory taillight wiring.

I have problems with mine. I can max everything out and it runs 14.7 at idle and midrange. Drops to 13.3 at Wot

Big thanks to Matt at MPI. He led me to the proper clutching chart on his website.

I have a Yamaha/MPI sea level supercharger kit. Does anyone know the rivet placement in the new weights?

Post what you find out. I have a 2010 xtx with the mpi s/c and was wondering the same thing