You do not lubricate a clutch - You clean it. If you lubricate it will slip and it will collect dust and dirt from the belt and it will bung it up..
the weights are in your primary clutch
Purchase a clutch rebuild kit, and a clutch puller tool.
It takes some fabrication, you have to use the secondary clutch from the scrambler and shim it to fit the snowmobile belt. You will use the snowmobile primary clutch and some cutting and welding to fit the motor in the frame. You will have to fab custom mounts and reinforce the from where the scrambler chaincase mounts to. A big radiator like one from a 96 honda civic fit well. With the electric fan. It's not too hard if you know how to weld and fabricate.
To set the clutch on a Polaris snowmobile make sure you have cleaned the entire clutch assembly and adjust all the bolts to the proper setting. With both of those things done make sure you have properly lubed and set the belt to the right tension.
You do not "lube" a centrifugal clutch. http://www.snowmobileforum.com/engine-drivetrain/26360-generic-clutch-cleaning-advise.html
you need a special puller $30
it is usually located in front of the engine, right next to the clutch. it looks like a a soda can with a sprocket on it
Look under the exhaust pipes on the clutch side of the engine.
Cracks, peeling, crumbling, chunks missing, dry rot, also when you notice your snowmobile not accelerating as fast, or you hear squealing from the belt. also if there is a vibration in your sled, a common mistake is that people think there clutch is going bad on there snowmobile, but really its just your belt
Yes , you can use a motorcycle helmet for a snowmobile.
you probably need to have your clutch rebuilt in order for it to grab the belt at a reasonable RMP range.
no no no only use 2 cycle oil