I just went through this a few weeks ago. I was tryin for a set of KYB's on my mountain max from a viper only to find out the hard way it's not that easy. Start with the works performance shocks fit chart. The mountain sleds all use a shock that is 15.38" eye to eye with a forked upper mount. I wished I had looked at this before I bought the first set, now I have a set of long viper shocks to sell.
There are a few sets of viper moutain shocks on eBay right now if you want to go that route. The problem you may (will almost certainly) is that trying to just find a single shock it will certainly be worn and have different performance than the other one. Another thing to consider. While the chances of finding a set are lower, shocks from a phazer mtn lite or early mm 600 twin have different spring rates and may not have enough preload to give you the proper set in even turned up all the way.
