Clutching and belt slip issues!

[CO 2.0]

So since the end of last year every time I take a hard turn in the powder and am under full load my belt slips really bad then finally catches. Clutches are hot to the touch. This is stock 09 Dragon clutching with 10-58 weights. Clutch alignment is very close to spot on, clutch just balanced by indydan. Riding at 10K ft.

Do I need to add more weight or less spring in the primary? My clutching holds perfect 8100 rpms on the flats but bogs down and holds to 7500-7800rpms when turning or climbing in deep snow.

Is my belt slipping a case of wrong clutching or is it snow ingestion from my side panel vents? I am starting to think snow is getting on the clutch since it only slips when or after I get the sled on its side under heavy load. My side panel vents don't have prefilter material on them so I'm guessing the snow is getting forced into them at speed. I purchased a bunch of prefilter material from SLP to see if that solves the problem, if not, I'll start messing with my clutching.

Anyone else experienced any of this?

 

[thefullmonte]

You could very well be getting snow in there from your description. That would be the first likely place to look.
What altitude are you at? Those weights sound extremely light for the 800. Is this on the updated motor?
I'm starting to suspect some of these motors aren't getting the exhaust valves to open completely preventing them from achieving proper rpm.
You could add more weight in the primary along with a higher finishing rate spring.
Less helix and/or stiffer spring in the secondary would also hold rpm better.
Let us know your alt so we can get a better idea what is happening.

 

[CO 2.0]

I ride 10-12K ft all the time. Clutching works as I described anywhere at that elevation. This is an 09 motor still. Rebuilt in June but still the 09 stuff. Was doing this before and after the motor was rebuilt from a mag side piston seize. I've tried less helix already and it didn't change anything. I should probably just wait until my update gets done before I change the clutching though, but with the new update and slp pipe/can I should be able to pull 10-60's anyway over the 10-58's I run now. I also have a bright green spring lying around that I could try too...

It's hard to tell if I'm getting snow in from the side panels or not cause there is always snow in that compartment from my footwells. It just seems logical that snow if getting in from there if the belt is slipping only when hammering it on its side in the deep.

 

[aebsledder]

SLP Clutching

Do you have the pipe and can on now? SLP recommends 68 gram weights with a 1 gram rivet in the outer hole, as well as the blue pink spring. My 09 dragon came with 62 gram weights stock and it pulled 8100 to 8200 all the time, until the end of the season. Then it was only pulling about 7800. When I installed my pipe and can this weekend and changed the clutching I discovered my spring was broken. This probably wouldn't cause your belt to slip though. I would say if it always slips when you lay the sled over on the drivers side you are probably getting snow in there. I see you ride at 10-12k, maybe those weights are fine. Good luck.

 

[skibreeze]

I'd say that you are definitely getting snow in your clutches.

The stock clutching seems to pull down rpms on the long climbs at our altitude. I'm no help with a fix on that though.

 

[Flit-e]

when i ran 10-58 my sled seems gutless..I would seal up where the snow is coming from, and talk to ron about some weights.

 

[rmk727]

ya your getting snow in but really sounds like you need the up date as I think your exhaust valve springs are probably nothing but rust , seen a lot of that when doing motors, plug that hole and move it, also gear down clutches shouldn't be so hot, u know the drive is good if dan did it so it's in your set up but check those valve springs

 

[CO 2.0]

Sounds good guys, gonna be sealing the hell out of my clutch area with prefilter material. Seems there is a thing as too much venting, or not fine enough material the guy used on my side panels.

I have some Ron weights and the same thing was happening. Will probably try them out again once I figure this belt slip out.

Thanks for the heads up on the exhaust valve springs!