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Paw Paw
Thanks for the help.
The Shop
Quickly put the front wheel against a fence post, ground it up into the highest gear possible, (3rd or 4th) held both brakes, and dumped the clutch. Would have been a good ride had it not stalled. A nice split on the underside of the intake manifold rewarded me with a mild adrenaline rush.
The only other way to kill a run away is to cut the air intake to the engine. Have had several of the older two stroke water craft run away on me as well when I worked at a small shop. Mostly due to crusty carburetors or misadjusted speed screw settings.
You could yank all three plug wires on a triple cylinder, two stroke PWC that was revving to the moon, and it would never miss a beat.
When those shit boxes would roll in for service, it only took one runaway before I learned not to fire one off on the trailer without the airbox cover off and a pile of rags handy to choke the thing off.
On most two stroke motorcycles, a crank seal will leak a bit to maybe create a lean condition, but a lot of times, the seal will be so worn that engine compression is lost, and they are lucky to even run at all.
IF the throttle is not stuck or physically open too far, ignition off, then this works. Active Radical Combustion,
usually called closed throttle runaway is as many have stated here a lean condition. The theory was used
in a controlled sense on Honda's EXP-2 bike, enjoy:
http://www.motorcycle.com/manufacturer/honda/honda-exp2-14293.html
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