Quote:
Originally Posted by Ptero
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 ::
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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. |
You need to multiply road speed RPM by 6.168 to get RPM's for anything installed at the clutch drum, which seems to me the easiest place to put it. That gives us greater than 6K RPM for 60 mph.
Also, what kind of sloppy speed matching are we talking about? Jamming the throttle from idle? And I think you might be using a different year or model Burgman than either janvos or I as the 130/70-13 tire I have calculates out to 60 mph at just slightly OVER 1K RPM.
And the 44ft/lbs is flattering, but probably the crank output of the newer (2007 and up) model.
