Clutch weight question

[mountainmaxman]

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

 

[Turk]

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?

 

[mountainmaxman]

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!

 

[Turk]

Your engagement & running rpm,s are spot on. Can,t do any better then that. Your as good as it gets.

 

[mountainmaxman]

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?