Maintenance Questions, MXZ 2005 800CC & MXZ 2003 600CC

The chaincase bolt with a cotter pin in it is the chain tensioning bolt. you should take the cotter pin out and check the tension ever few hundred miles. If I remember right, the tensioner screws down (turn the bolt as if you were taking it out). If you don't feel it get tight after about two turns, go the other way. Turn it until the chain is finger tight, then back it up to the closest hole the cotter pin fits in. At least that his what I do.

The clutch. I believe both of these snowmobiles should be running just over 8000 RPM. There are three small bolts on the primary (engine) clutch. There should be a pointer on big end of the bolt and the aluminum clutch should be numbered one to six. If the pointer is on 1 your engine run the slowest, 6 the fastest, with approximately 200 RPM for each notch. Be sure to keep all three bolts adjusted the same. When changing the bolt to a different number, do not take the bolt all the way out, just barely far enough out to turn the head to a different number.

To change your belt, there should be a small 2" long bolt with a folding "T" handle in your tool pouch. I'd suggest lubing the bolt with a light oil or WD-40 to make sure the threads do not give out while you are using it. There should be a hole a little off center in the secondary clutch (the larger diameter clutch) and the bolt from the tool pouch will thread into this hole. Gently thread it in, after a few turns will you feel a little tension and see the clutch sheaves start to separate, making it possible to slip the belt off of the clutch. Use the bolt to open the clutch enough to easily slip the old belt off and put the new one on. Once the new belt is on, take the little bolt out and put it in your tool pouch. Then wiggle the belt until the clutch sheaves come back together, otherwise your snowmobile will be in high gear when you try to go and you'll smoke your new belt.

One more thing I think you should do is check your "Y" pipe bolts are tight. These have a tendency to work loose. They are the allen head bolts that hold the exhaust to the engine.

Check out the Ski-Doo website, can download your owners manual, assembly drawings with part numbers, and advertised specifications for your year and model of snowmobile.


http://www.ski-doo.com/en-US

On the top, hold your mouse over the "Owner Center" header. There will be several screens you have to navigate through, just keep clicking whatever they ask you for.