M8 Skid Fox Float Air Pressure?

[Mongol]

Hello everyone, new member here, first want to say thanks to everyone for all the usefull information on the site. I found a lot of answers to the many questions I had after I decided to switch sleds. Having said that, now that I've made the decision and switched over to the M8, I now have more questions as I'm pretty much a rookie mountain rider.
What air pressure are you guys using in the fox float in the rear skid on M8 sleds? I recently picked up a 2010 m8 SP 153 and I am extremely impressed with the sled, my only complaint is I find the rear suspension brutal on the moguls found on the ungroomed switchbacks I have to ride to get to the powder up top, not to mention the ride back down after riding all day. I'm 230lbs plus gear, and just looking for a more comfortable ride on rough trails, not into big jumps, dropping cornices, or anything else that will really ask a lot of the suspension. The little riding I have done was with the fox float air shock pressure @ 155-160psi, which I believe is near or at the upper limit. I know I have go with less pressure but was just wondering about a starting point from where I can fine tune it for myself. Without enough snow around here to ride, I'd like to keep the fine tuning to a minimum when I get to the mountains, which is why I'm only seeking a starting point.
I thought I seen a thread about this a while back, but have been unable to find it. Any advice or help would be appreciated, cheers.

 

[ripsass]

I'm 230 and run mine about 125-130 with some drops and big hits. Pretty good balance there.

 

[Coxy]

I am back to 130psi. I tried a bit lower like 115-120 thinking it might transfer better and trench less, but it turned into a circus to ride, and seemed to wheelie too much causing it to trench worse? Mine is a 153" which seems to make a fair amount of difference. Geared im in the same weight ballpark.

 

[Nickname]

Do the GEO mod. (Do a search on Geo mod) Night and day diferent.

 

[dmkhnr]

I'm using the fett bros air canister on the rear float shock and it seems to work pretty good. I can run 140# and it rides down the trail like it has 120#, yet keeps the shock from sagging.
I've got an extra brand new canister that I'm not using, if you want to try it pm me.

 

[Mongol]

Thanks for the advice guys. I'm heading back to BC in about a week so I'll try running it at 130psi. I want to see for myself what adjusting the pressure wil do before I start playing with anything else, but I will definately keep the geo mod as well as the Fett bros canister in mind in case I'm still not happy with just a pressure adjustment.

 

[Frostbite]

Ok, I must be the odd man out but, I run 52-53 in the right front and 55 in the left front shocks. I weight 170 without gear.

In the rear I run 100 even and it seems to work awesome.

Am I missing something here? Why are my pressures so low and everyone else's so high?

I wanted to use more of the shock stroke and allow the sled to transfer in the powder and while climbing. It does now that I have lowered the pressures.

Yes, I did set my pressures in my shop with heat. So they will be lower in the field. Also, I weight 170 without gear.

 

[silvester]

I'm a 240ish geared up rider and on my 09 m8SP I'm running 60-65 in front 150ish in the rear and the front skid bolt in the lower hole. With the Full SLP exhaust this thing jumps on top of the snow and planes out awesome when you peg the throttle. I still have some playing with pressures to do but I'm close enough not to care too much cause I'm having too much fun. I might drop the front shocks to lower 60 psi's on my next ride to help her roll a little easier. In the rear you should definitely be at least 145psi so the suspension isn't at half sag all the time, which really drags the sled down in powder. I'm convinced Track speed has more to do with Trenching and getting up on the snow given your pressures are in the ball park. Given my suspension is stock it's not the best trail ride, but that's not really what I want it set up for. I am looking into a re-valve for the rear float to get a little more rebound response for the bumps, other than that I'm pretty happy. Remember to set your pressures when you are out riding at temperature, not in the garage.

 

[M8 Rider]

M8 Rear Float PSI

I weigh 240 and I ride a 2008 M8 SnoPro 153. I run 145psi in the rear float and 65psi in the fronts. I have done the Burandt conversion in the rear shock and upgraded the fronts to Float 2. The conversion has made a great improvement on both the trail and backcounty riding.