Mike,
This may not be relevant to your situation, but I pass it on for what it may be worth:
Last year after having to trim off and resecure the cockpit end of the throttle cable (get rid of the end that was fraying) it seemed that no matter how we tried to adjust the tension on the spring at the throttle handle we experienced throttle creep.
Unexpectedly, when we synched the carbs (turned out they were pretty badly out of sync on the low end, the creep situation resolved completely.
