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Post by joon537 on Oct 10, 2011 15:58:57 GMT -5
And...... of course it depends on the take-up pulley spring, the stronger spring you have installed (to combat belt slippage), the heavier the roller/slider you will have to install. Is this the Contra spring u speak of?? |
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Post by Fox on Oct 10, 2011 17:24:06 GMT -5
Yeah the contra spring fights against the weights. It's the big coil spring inside the clutch that squeezes the rear pulley halves together. It tries to keep the CVT in "low gear" and the weights overcome the spring tension at high revs forcing it to compress so the belt slides up and down the pulleys changing the gear ratio not unlike a multi-geared bicycle. The difference being that it "shifts" automatically from low to high. The lighter the weights the more it wants to stay in the low end of the ratio so you get higher revs and more torque at slower speeds. If you go too light then the spring overpowers the weights and you will actually lose top speed. The clutch also has three other springs that pull the clutch pads away from the clutch drum at idle. Then when you gas it they stretch out allowing the pads to grab the drum and away you go.  |
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Post by joon537 on Oct 11, 2011 15:34:36 GMT -5
I'm thinking that maybe I should have gone w 5g's...  yeah. i have found that 5.5g work best for me. Seems that 2t's like lighter rollers than 4t's. i think this is because 2t's operate at higher rpms. i wouldnt go any higher that 5g in a 2t. You running a 70cc bbk?? |
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Post by joon537 on Oct 11, 2011 15:42:42 GMT -5
Yeah the contra spring fights against the weights. It's the big coil spring inside the clutch that squeezes the rear pulley halves together. It tries to keep the CVT in "low gear" and the weights overcome the spring tension at high revs forcing it to compress so the belt slides up and down the pulleys changing the gear ratio not unlike a multi-geared bicycle. The difference being that it "shifts" automatically from low to high. The lighter the weights the more it wants to stay in the low end of the ratio so you get higher revs and more torque at slower speeds. If you go too light then the spring overpowers the weights and you will actually lose top speed. The clutch also has three other springs that pull the clutch pads away from the clutch drum at idle. Then when you gas it they stretch out allowing the pads to grab the drum and away you go. Yesir well aware of the operation, gr8 vid. I noticed the 1 in my bike is blue, has to be NOT stock lol.... I don't have the factory 1, but I think I have a white one laying around somewhere... Not sure if replacing them would make much of a diff, think my issue is roller weight |
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Post by aeroxbud on Nov 10, 2011 9:41:52 GMT -5
i dont know anyone in the uk that uses sliders i did question it at srt tuning a few years ago as they had tried them and shiny said they did not work as well on a 50 and the only advantage was on a 125 they lasted longer. i have never seen them for sale in the uk or any of the german tuning sites
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2tfvr
Scoot Member
Posts: 30
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Post by 2tfvr on Dec 21, 2011 2:42:53 GMT -5
sliders seem to last longer due to the large contact area acting on the surfaces of the variator. the large contact area creates a better leverage for more positive variator actuation. plus the spinning action of the rollers creates friction that eats away on the material of the variator - which i noticed a metallic sheen on the buildup of the rollers.
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