throttle roll-off?

The deal is that 2-strokes' engine lubrication comes from the oil you mix into your fuel. So, no fuel = no lube. If you are ripping down a hill at high rpm's and just let off the throttle your piston will still be going extremely fast, but your lubrication will be almost nil.

You can get around this by pulling in the clutch so the piston slows down, or maintaining throttle. I'd bet there are other ways.

The point is, you don't compression brake as much on a 2 stroke.

Also bear in mind that it's not speed related, it's RPM related.

-Dawg

Its probably best to let off completely on the throttle than rolling off. That way you cut off the gas almost completely and no excess heat is generated. But if you let off to half throttle then you've limited the oil to the piston/rings but still theres enough gas to create more heat which could possible melt some of the piston. (ie: siesure)

jag don't forget the incoming charge of fuel plays a major roll in cooling the piston crown and thus keeping the engine cool.

David

Dave, I know, but at high revs when you let off on the throttle then the mixture is lean.