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M8 Suspension Tuning Questions

Rob.G

Well-known member
Lifetime Membership
Premium Member
I have a new (to me) M8 153 Sno Pro Limited that I got recently... got it out for a ride yesterday, and it needs some suspension tuning.

I ride in the Sierra Nevadas so most of our snow is hardpack with a little bit of soft on top.

Years ago, I had a 2005 M7 that I bought new and it was absolutely amazing. Soooo nimble. I could get it up on one ski by simply applying pressure to one of the running boards and a slight countersteer. This is while riding neutral. I could get it up on one ski and ride it like that for as long as I wanted.

Fast forward to now... I love this new sled but it takes a lot of work to get it up on a ski, and even more to hold it there.

This thing, being a sno pro, has FOX floats all around. Ski shock pressures were at 75 psi... dropped them to 65, then to 55. No change. The FTS is a coil spring setup. I remember the RTS is at 140. I think that might be too high... today I reduced it to 110. I noticed it was hard to steer. I put SLP Powder Pros on it and it was just very very hard to steer on flat ground. The stock skis on my friend's regular M8 were much better if less precise.

FWIW, I couldn't get his sled up on one ski very easily either; and his sled has coil spring front shocks with no adjustments.

Today, I checked the limiter strap. It's as loose as it can get.

On my M7 (which also had Powder Pros), the skis were in the "center" position, as they are on this M8. The skis on both have the exact same bogey wheel setup too. The only difference I can see is the M8 has the rear wheels inside the rails, whereas the M7 (and my friend's M8) they're outside the rails.

So.. I'm trying to figure out how to make this thing more nimble and like my old M7... how do I do that?
 
What do you weigh?

The M7 had a lot of rear end "slip" with the attack 20 track so it would kind of slide out a bit when you rolled on edge.

The torsion spring suspension transferred weight more than the later Float and coil over skid too. Try looking up the Geo mod to get more weight transfer. https://www.snowest.com/forum/threads/does-the-geomod-work-on-2010-m8.198971/

The rear idler wheels being on the inside of the rails vs on the outside actually helps it lay over easier.
 
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