mountainmaxman
New member
I have a 99 Mtn.Max 700 with a Peak high performance head and Bender pipes along with V-Force reeds. It has a 144 extension and a 2.25 finger track. The sled was purchased from Colorado (about 11,000) feet. The sled also has a P-85 Polaris set up from Hartman. Although I rejetted the carbs for low altitude, the clutch weights are WAY to light for an altitude of 2,000.
The clutch currently has 40.3 gram weights. I called Hartman and was told I should increase that to around 52-53 grams. I weigh 225 pounds and ride 97 percent off-trail (boondockin').
Currently, the sled doesn't engage until about 5,000 rpms, then it drops down to about 3,800 before re-engaging again. With all the aftermarket goodies, the sled still won't raise the front skis off the ground. And with the high takeoff and then lull before re-engaging, I am CONSTANTLY digging 1-2 feet down before the sled takes off Plus, I have no rip to jumps berms, etc.
Can anyone fill me in whether the 52-53 grams is where I should be? I am at wits end with this and am relatively new to snowmobiling so my technical skills aren't the best by any measure of the imagination.
I am considering two options. Changing the weights on the P-85 or just swapping clutches on my second sled which is a 98 SRX Mountain 700. Not sure what the weights are in that, but it has a lot more low end snort than the Mtn.Max.
My second question is what is "standard" weight set up on a 1999 Mtn.Max clutch? I am curious on this one just to see how far off the P-85 is to a stock Yami clutch.
If anyone can help out, could you please PM me? Any help would be GREATLY appreciated. I'm sick of riding a pretty maxed out Mtn.Max and not beig able to jump over a 2-foot gully just because I don't have that low-end rip that a sled with all the above goodies on it should have.
THANX GANG!
MountainMaxMan
The clutch currently has 40.3 gram weights. I called Hartman and was told I should increase that to around 52-53 grams. I weigh 225 pounds and ride 97 percent off-trail (boondockin').
Currently, the sled doesn't engage until about 5,000 rpms, then it drops down to about 3,800 before re-engaging again. With all the aftermarket goodies, the sled still won't raise the front skis off the ground. And with the high takeoff and then lull before re-engaging, I am CONSTANTLY digging 1-2 feet down before the sled takes off Plus, I have no rip to jumps berms, etc.
Can anyone fill me in whether the 52-53 grams is where I should be? I am at wits end with this and am relatively new to snowmobiling so my technical skills aren't the best by any measure of the imagination.
I am considering two options. Changing the weights on the P-85 or just swapping clutches on my second sled which is a 98 SRX Mountain 700. Not sure what the weights are in that, but it has a lot more low end snort than the Mtn.Max.
My second question is what is "standard" weight set up on a 1999 Mtn.Max clutch? I am curious on this one just to see how far off the P-85 is to a stock Yami clutch.
If anyone can help out, could you please PM me? Any help would be GREATLY appreciated. I'm sick of riding a pretty maxed out Mtn.Max and not beig able to jump over a 2-foot gully just because I don't have that low-end rip that a sled with all the above goodies on it should have.
THANX GANG!
MountainMaxMan
Weight is related to your secondary set up.
Sled should engage at 4000 rpm & be at 8600ish rpm at wide open throttle.
as usual not nearly enuff info is given to give proper help
standard weight on that sled is 8cr & you can not load them heavy enuff for bender pipes at your altitude unless you run big *** helix.
gotta know these things
what are your rpm,s at wide open throttle from a dead stop to top speed
what is your secondary set up?
gearing?
Sled should engage at 4000 rpm & be at 8600ish rpm at wide open throttle.
as usual not nearly enuff info is given to give proper help
standard weight on that sled is 8cr & you can not load them heavy enuff for bender pipes at your altitude unless you run big *** helix.
gotta know these things
what are your rpm,s at wide open throttle from a dead stop to top speed
what is your secondary set up?
gearing?
mountainmaxman
New member
Turk...more info
I've got the Hartman set up sheet that came with the sled. Max speed is about 80 and the rpms are about 8,500-8,800 (can't remember exactly as I had it opened up last season...but if this is critical, I can find out with a quick ride and post it here--but might not be till Friday evening as work will keep me from riding in the daytime and I don't feel comfortable opening'er up at night).
Secondary specs are stuff that is over my head...but here's what the sheet says...spring color is stock green, spring setting is "start 3-3" 60 degrees". The helix is a Hartman multi-angle. Like I said, this stuff is over my head, but this is what the Hartman spec sheet sez.
BTW--The primary spring is a YSY 40.8 grams. Weights are 40.8 grams and at 8,000-11,000 feet, the clutch engaged at 3,700-4,100.
Hope this helps!
Thanx much!
I've got the Hartman set up sheet that came with the sled. Max speed is about 80 and the rpms are about 8,500-8,800 (can't remember exactly as I had it opened up last season...but if this is critical, I can find out with a quick ride and post it here--but might not be till Friday evening as work will keep me from riding in the daytime and I don't feel comfortable opening'er up at night).
Secondary specs are stuff that is over my head...but here's what the sheet says...spring color is stock green, spring setting is "start 3-3" 60 degrees". The helix is a Hartman multi-angle. Like I said, this stuff is over my head, but this is what the Hartman spec sheet sez.
BTW--The primary spring is a YSY 40.8 grams. Weights are 40.8 grams and at 8,000-11,000 feet, the clutch engaged at 3,700-4,100.
Hope this helps!
Thanx much!
Your engagement & running rpm,s are spot on. Can,t do any better then that. Your as good as it gets.
mountainmaxman
New member
Problem solved...I HOPE!
Just thought I'd put up a quick post and let those who have read this thread that I have solved the over-revving and drop down before the clutch engages.
So unless ya WANNA add something else to the post, I'm happy with the solution--which was bumping the weights up to 56 grams. Will check the gearing to see if any additional "tweaking" will help give a little more snort since I'm not worried about speed.
Up here in the Western UP of Michigan, there's no need to have speed if U R out boondockin'. WAY too many maple and hemlock trees to get going much more than 40-50 mph--unless of course U R "bobble-heading" on the trail system. But then again, what fun is that?
Just thought I'd put up a quick post and let those who have read this thread that I have solved the over-revving and drop down before the clutch engages.
So unless ya WANNA add something else to the post, I'm happy with the solution--which was bumping the weights up to 56 grams. Will check the gearing to see if any additional "tweaking" will help give a little more snort since I'm not worried about speed.
Up here in the Western UP of Michigan, there's no need to have speed if U R out boondockin'. WAY too many maple and hemlock trees to get going much more than 40-50 mph--unless of course U R "bobble-heading" on the trail system. But then again, what fun is that?