01 Mtn Cat 600 New Track & Extension Help - NOOB :/

it all depends on what the snow conditions you will ride mostly in, how much you want to spend and how often you will be riding it.

a 136 is plenty for basic trailing to your spot, however if you need to get places that are tougher to get to like breaking trail, trees, and deep snow than yes I would extend it. You might want to think about some bolt on mods just to get you where you need to go.

I have a 153 powerclaw that is 15 inches wide with a 3.0 pitch.

If you have anymore questions shoot me a PM

Where will you be doing most of your riding and at what elevation

I currently have a 01 600 MC that had a 136 2 inch track when I bought it. I extended it to a 144 2 inch using a WPS 4 inch rail extension(approx. $75). I also removed the 2 outer bogie wheels in the front and added a 8 inch inside wheel kit on the back($100 for the offset axle and $30 for the 8 inch AC M-series wheels). If you go longer than a 144 you will probably need a tunnel extension. The track you need to fit your sled without changing the drivers will be a 2.52 pitch noched track (to clear the heat exchangers). An anti ratchet driver would be a good investment, the stock MC drivers only engages the inside rows of lugs where the anti-ratchet driver engages the outside row of lugs as well as the track windows allowing you to run a looser track freeing up hp and track speed. A 600 144" will not be as capable as a 800 153 or 169 but does pretty good if you are a good rider. I have not had the chaincase off so I cannot tell you what I am running for gears. I ride at 5-7 thousand feet and if you need clutching info let me know and I will get you the cluch info on my sled (I am sure there are better setups out there being used).

You can go up to a 151 and drop down one tooth on your bottom gear! I have done this on a 2000 powder special! Rail extensions are easy fix or some times good used rails will work!

The clutching is a matter or opinion. I don't recall the primary setup but I think the secondary was a 54/46° helix with a red/white spring.