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Post by xyshannen on Oct 17, 2014 11:46:06 GMT -5
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Post by rockynv on Oct 17, 2014 12:06:00 GMT -5
If it did not adjust then you would need the engine to move on a hinge to adjust for the changes in belt position and you would need a bigger driven pulley to give a similar variation in drive ratio (nowhere as good but a compromise).
My 1976 Mobyette had the clutch and variator combined with a fixed rear pulley so the engine hung under the bike on a hinge with a big spring to keep the belt tight as the variator went through its rang of motion. The muffler was very short and wrapped part way around the engine so it would not hit the ground or the frame of the bike as the engine pivoted on its hinge.
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Post by scooter on Oct 17, 2014 16:20:52 GMT -5
Maybe you can put the pin through one of several pairs of slots for different "action". A standard pulley only has two slots. A shift in angles would mean the tension of the pulley would change at that angled point. The slot to the left in your picture looks like it would give you even tension all the way from bottom to top, and the one to the right of it looks like maybe it would kind of semi-lock the pin in place, allowing the variator to keep it open (in high gear) with less effort, allowing you to back off the throttle in high gear will keeping the clutch open. I am sure I am confused and probably have it all backwards, as I have not taken the time to study the clutch mechanism, but one thing is for sure, the different angles are going to change the RPM curve of the scooter in conjunction with the variator. |
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Post by alleyoop on Oct 17, 2014 16:36:21 GMT -5
Take a closer look Bud, there are different pin slots on the sheave, one set of slot does not have a hump in the slots and the other set of slots for the pins are just a smooth slot no hump.. So you can switch the sheave to use either set of slots, smooth slots or ones with the hump. So the Purpose is that the hump acts like a temporary momentary lock when the cvt ratio is switching from high to low or low to high and helps keep things in time and helps your motor a little by not having to work so hard.
My .02 to be honest I do not think the EFFECT is worth the money since you probably may not even notice the difference.
Alleyoop
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Post by xyshannen on Oct 18, 2014 7:24:19 GMT -5
Thanks for clearing that up Alley..and I have to agree, I don't think you would notice much especially if you are running anything more than a stock motor. Even then I think the effects wouldn't be much.
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Post by rockynv on Oct 18, 2014 8:13:28 GMT -5
Didn't even notice it was some new fangled clutch sheave you were talking about. They are all self adjusting and the similar effect could be had by getting a set of different rate contra springs. The hump could delay the transition to cruising speed operation but that is a lot of bother to adjust that compared to just sufficing with roller/slider weight changes. Really just three positions with very limited documentation on Hoca's web site.
You could end up setting up one of these events when you tinker too much:
Can only imaging how much shrapnel would be imbedded in a rider or passenger if a clutch blew out at speed while riding.
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Post by surfpick on Oct 18, 2014 8:52:31 GMT -5
Eek!
What was their goal?
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Post by rockynv on Oct 20, 2014 4:22:13 GMT -5
Not sure aside from demonstrating what happens when you push things to far past the design limitations or can happen just from horsing around.
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Post by xyshannen on Oct 20, 2014 8:54:42 GMT -5
Yeah I dunno what they did to cause that and I have no intention of messing with my clutch like that. The stock setup works just fine on my setup. At most I'll install a clutch with better (larger) contacts.
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..BAD TO THE BONE..
