I like to contribute to this discussion on the overrunning clutch for a Burgman scooter.
I have driven with a sprague type in the rearwheel of the Burgman.
The results a\where Ok a considerable reduction in the amount of fuel used (about 10 %)
But it did not last very long roughly 3000 km. Than the overrunning clutch broke in pieces.
The type I used is mentioned in one of the replies.
I tried another one home made but that didnot last either .
I think that the overrunning clutch need to be placed in a shaft position where the rev's are higher.
Therefor i digged up the drawings that I once made for a solution in the clutch area. Here I will do my next attempt to make it work.
The last image shows in the top half the possible situation with a overrrunning clutch. The lower half is the as is situation in a Burgman .
http://users.telenet.be/janvos/burgm...clutchburg.jpg
