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OK, somebody 'splain to me how a 650 clutch in a 500 will reduce the RPM's.

I can't get my head around it and so it's time to ask!
 

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The gear on the clutch basket meshes with the gear on the crankshaft to form the primary reduction ratio. the 650 has a higher primary (36/74 is 2.056:1)compared to the 500(33/74 is 2.242:1) so revs lower per given engine RPM. If you want to see what gearing does what, supply me with a email address and I will send you a simple excel program I wrote that shows the effect of changing any gear, or tyre size to engine rpm, per 1000rpm in all gears.
 

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I did it and believe me it is different. It's like having a 5 1/2 gear. Infact now if I need I can sit in 4th gear even longer and when I shift into 5th the rpms are way down.



I hate mechanical gauges but I can tell you what i'm seeing. Instead of being 500rpms behind the speed.

ex.. 6500rpm's = 70mph.

Now imagine this.

at 6500rpm's i'm doing 80mph.



The only precise way for me to know would be to borrow a gps and maybe pick up a electronic tach but i'm not that concerned.
 
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