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Ptero · 05-31-2009, 06:44 AM

I don't have the specs for the one rated for 250cc. You wouldn't want to use that one anyway. It's too small.

I suggest one from this series. These look very tough, easy to disassemble and simple to machine to fit.
:: Dayton Superior Products ::

Choose Products/Clutches/Overrunning clutch

For the Burgman, the OR 100 Overrunning Clutch is rated at 100 ft/lb torque at 1000 rpm. The Burgman is rated at 44 ft/lb torque at 3400 rpm, so you'll be running with a factor of safety of about 3 which should be ideal to survive some sloppy speed matching without damage. My calculations show 960 rpm for the Burgman's 21-inch diameter rear tire at 60 mph, so it's right on the sweet spot.

The O.D. is 3 3/8-inch. The I.D. comes in 3 sizes that can be machined to the correct shaft size. Let me know what you think, looking at the teardown. I don't have any drawings for the Burgman but I bet there's a way to do this that's bulletproof.

05-31-2009, 06:44 AM	#32 (permalink)
Ptero Hydrogen Nut Join Date: Oct 2008 Location: California Posts: 152 Smart Car ForTwo Pure - '08 Smart Fortwo Pure stripped 90 day: 51.35 mpg (US) BMW 750iL V12 - '90 BMW V12 90 day: 26.4 mpg (US) Wildfire 250C - '08 Shandong Pioneer 250C Thanks: 2 Thanked 33 Times in 22 Posts	I don't have the specs for the one rated for 250cc. You wouldn't want to use that one anyway. It's too small. I suggest one from this series. These look very tough, easy to disassemble and simple to machine to fit. :: Dayton Superior Products :: Choose Products/Clutches/Overrunning clutch For the Burgman, the OR 100 Overrunning Clutch is rated at 100 ft/lb torque at 1000 rpm. The Burgman is rated at 44 ft/lb torque at 3400 rpm, so you'll be running with a factor of safety of about 3 which should be ideal to survive some sloppy speed matching without damage. My calculations show 960 rpm for the Burgman's 21-inch diameter rear tire at 60 mph, so it's right on the sweet spot. The O.D. is 3 3/8-inch. The I.D. comes in 3 sizes that can be machined to the correct shaft size. Let me know what you think, looking at the teardown. I don't have any drawings for the Burgman but I bet there's a way to do this that's bulletproof. Last edited by Ptero; 05-31-2009 at 07:57 AM..