700 rmk clutch problems!

Belts and shouldn't get that hot. Warm would be ok, but should stay cool if clutched correctly. Maybe Try more weight if it will pull it, or adjustable weights like Thunder Weighs. That way you can load the heel to get the belt squeeze, but keep the tips a little lighter without having to grind stock weights to get RPM. If you do it right, I bet you could run 8-10 grams heavier and the belt will last a hell of a lot longer.

In that sled the only belt that will live is the 3211115. There spendy but worth it.

How did you check the engine mounts???
Did you remove the engine from the sled... remove the mount and flex it while holding it in a vise??? this is the only way to check them, a visual will not do it

What are your helix, secondary spring, primary spring, weights?
What is the side clearance on the belt?
What gearing is in the sled?

With the back of the sled lifted off the ground and the belt off... does it feel like the brake is dragging?

More to check... but this is the starting place.

I second what Super Dave has to say... run only the 3211115 belt.

I also suggest you get the primary balanced and have the clutch properly shimmed for the 115 belt.

Sometimes the primary's are just "off" and will not work well. I've personally run into this a few times.

Pull off the primary, pull the spring, re-install the cover and check that the sheave slides freely on the spider.

Has the sled ever been crashed or rolled?

i would replace the primary spring while your at it. Even though the sled has low miles on it, it is 5 years old.

What he said... Replace BOTH springs!!

MH pretty much nailed all the vital info..

you must pull the motor to check the motor mounts..

--replace both clutching springs
--replace motor mounts
--115 belt
--setup clutching to spec, and replace the helix with a better one

come to the polaris 900 section...this is a baby 900 so all rules and info apply to this one as well.

good luck, hope all works out for you