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Post by dexameth on Sept 20, 2016 16:55:14 GMT -5
So I just installed a new belt last night and scooted to work this morning. When I got here I noticed a continuous scar all the way around my belt.  You can even see the Gates logo worn down. So I have 5g sliders and a stock contra spring and 1.5k clutch springs. I love this setup and it actually revs really high allowing amazing take offs and a good 48mph top end cruising around 40 unless I push it. I would not expect that light of a weight to push the belt all the way up the variator. Another thing. When I finally get past 42 the rpms drop significantly but I still gain speed. Weird. Has anyone else had this problem of your belt rubbing the solenoid? |
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Post by gsx600racer on Sept 20, 2016 17:23:19 GMT -5
First it's hitting your starter bendix, not the solenoid <----(electrical). Solenoid  Bedix  Yup, its common with "hi speed" variators. Iv had this issue with a couple of my setups This is both a good thing and a bad thing. The good: your sliders are doing a good job getting the belt to the most outer part of your variator.(most speed) The bad: your belt and bendix are paying the price for your new found speed. (the belt could be making enough contact to spin the bendix and in turn be spinning starter, which could be damaged by being spun at a insane amount of speed) Fixs to try, Take out the bendix and keep the sliders and just use the kickstart. Switch back to rollers. Leave the bendix and sliders in and take it easy till the belt wears in. You could try swapping to a different variator. Add a shim to the drive boss and keep variator and sliders & electric start. |
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Post by dexameth on Sept 20, 2016 17:36:20 GMT -5
Fixs to try, Take out the bendix and keep the sliders and just use the kickstart. Switch back to rollers. Leave the bendix and sliders in and take it easy till the belt wears in. You could try swapping to a different variator. Add a shim to the drive boss and keep variator and sliders & electric start. -I don't want to use just a kickstart. I've had problems before, and friends have cracked the CVT cover using the kickstart too much. -I'm going to try 6 gram rollers when I get home, mainly to drop the RPMS a little bit, but my worry was with more weight comes more belt travel... maybe? Looks like more CVT tuning to do. I have a stock variator at home, an assortment of weights (lost a set of 7g sliders damnit!) and three different contra springs. -Take it easy?! NO WAY  -I actually swapped from a short drive boss to the stock longer one. I don't know for sure if I'm rubbing with the stock boss... I'm gonna turn the belt around and see if it marks up again. Thanks for the quick help! |
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Post by gsx600racer on Sept 20, 2016 17:41:22 GMT -5
Fixs to try, Take out the bendix and keep the sliders and just use the kickstart. Switch back to rollers. Leave the bendix and sliders in and take it easy till the belt wears in. You could try swapping to a different variator. Add a shim to the drive boss and keep variator and sliders & electric start. -I don't want to use just a kickstart. I've had problems before, and friends have cracked the CVT cover using the kickstart too much. -I'm going to try 6 gram rollers when I get home, mainly to drop the RPMS a little bit, but my worry was with more weight comes more belt travel... maybe? Looks like more CVT tuning to do. I have a stock variator at home, an assortment of weights (lost a set of 7g sliders damnit!) and three different contra springs. -Take it easy?! NO WAY -I actually swapped from a short drive boss to the stock longer one. I don't know for sure if I'm rubbing with the stock boss... I'm gonna turn the belt around and see if it marks up again. Thanks for the quick help! You will rub/rub more with the shorter drive boss. That's why I suggested shimming to make your boss distance longer. |
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Post by Deleted on Sept 20, 2016 17:49:13 GMT -5
Fixs to try, Take out the bendix and keep the sliders and just use the kickstart. Switch back to rollers. Leave the bendix and sliders in and take it easy till the belt wears in. You could try swapping to a different variator. Add a shim to the drive boss and keep variator and sliders & electric start. -I don't want to use just a kickstart. I've had problems before, and friends have cracked the CVT cover using the kickstart too much. -I'm going to try 6 gram rollers when I get home, mainly to drop the RPMS a little bit, but my worry was with more weight comes more belt travel... maybe? Looks like more CVT tuning to do. I have a stock variator at home, an assortment of weights (lost a set of 7g sliders damnit!) and three different contra springs. -Take it easy?! NO WAY -I actually swapped from a short drive boss to the stock longer one. I don't know for sure if I'm rubbing with the stock boss... I'm gonna turn the belt around and see if it marks up again. Thanks for the quick help! Just for the record, a properly adjusted and maintained kick starter will work just fine. But, I would also check that the bushings for the Bendix are installed and in good shape in the CVT cover and, at the other end of the Bendix. If they are worn, or have fallen out, it will allow a lot of extra slop in the starter Bendix and allow it to hang down closer to the belt than it is suppose to be. Gsx600racer has covered everything else I believe. Bill |
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Post by dexameth on Sept 20, 2016 17:58:00 GMT -5
Thanks guys. I noticed the scars on the belt when I was using the short boss. This morning I installed the longer one but didn't flip the belt around so I really don't know if it has rubbed today or not. When I turn it around I'll find out.
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Post by gsx600racer on Sept 20, 2016 18:50:22 GMT -5
I ran a DDX race variator w/SEF ramp plate & Dr Pulley slider & shorter drive boss and had this same problem.
Iv always wanted to hook up a multimeter to the starter to see if the starter was being turned by the belt.
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Post by Deleted on Sept 20, 2016 18:57:10 GMT -5
I ran a DDX race variator w/SEF ramp plate & Dr Pulley slider & shorter drive boss and had this same problem. Iv always wanted to hook up a multimeter to the starter to see if the starter was being turned by the belt. I think that if your starter were being turned that you would not only hear it, you would feel all of that drag. (Due to Lenz Law) It would in fact act like a brake. Still not a good thing to have the belt rubbing as, it wears out your belts (Obviously) and it also adds some drag. One could drill an access hole to the nut on the cooling fan and attach a rechargeable drill to it and start that way. Bill |
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Post by gsx600racer on Sept 20, 2016 19:03:17 GMT -5
I ran a DDX race variator w/SEF ramp plate & Dr Pulley slider & shorter drive boss and had this same problem. Iv always wanted to hook up a multimeter to the starter to see if the starter was being turned by the belt. I think that if your starter were being turned that you would not only hear it, you would feel all of that drag. (Due to Lenz Law) It would in fact act like a brake. Still not a good thing to have the belt rubbing as, it wears out your belts (Obviously) and it also adds some drag. One could drill an access hole to the nut on the cooling fan and attach a rechargeable drill to it and start that way. Bill On my scooter that sounds like this, I can barley hear myself think. LOL Never mind hearing a starter spin. You would have to drill a hole thru the flywheel side to start with a drill, On the variator side you run the risk of backing off the nut.  |
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Post by dexameth on Sept 20, 2016 19:22:37 GMT -5
I installed a 7 and 5 gram roller mix and went for a test ride. Acceleration was a little slower  and I got a 49mph top speed. RPMs were a little lower, barely too low. Just a tad bit heavy. After the test run there is a tiny little scar along the belt (I turned it around so I could have a clean slate). To turn the tables: I reassembled my stock rear pulley assembly that I had just purchased. I had the torque base from my old scoot, the converter from the new clutch and the actual clutch from the old scoot. Since the new clutch was bad I reassembled the new stock torque pulleys and my old clutch pads and new bell. Here's the difference:  Old stock torque pulley (closest to the gearbox when assembled) on the left, newly purchased stock one on the right. The new one has a lower stack height! I don't really know how this would change things but my take offs felt smoother and I even eliminated some vibrations I had. It's late, I'm hungry so I'm gonna leave it be till tomorrow. |
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Post by Deleted on Sept 20, 2016 19:58:40 GMT -5
I think that if your starter were being turned that you would not only hear it, you would feel all of that drag. (Due to Lenz Law) It would in fact act like a brake. Still not a good thing to have the belt rubbing as, it wears out your belts (Obviously) and it also adds some drag. One could drill an access hole to the nut on the cooling fan and attach a rechargeable drill to it and start that way. Bill On my scooter that sounds like this, I can barley hear myself think. LOL Never mind hearing a starter spin. You would have to drill a hole thru the flywheel side to start with a drill, On the variator side you run the risk of backing off the nut. Exactly, that's what I mean, the cooling fan nut/flywheel. That is how we used to start our racing Karts. Bill PS I could not hear it, someone must have been weed whacking in the background...ha ha. |
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Post by dexameth on Sept 20, 2016 20:02:04 GMT -5
Unscrew the fan cover, wrap a shoelace around the flywheel clockwise then around a handle and you got a pull start! I actually thought about this last night...
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Post by bredfield63 on Sept 28, 2016 6:22:57 GMT -5
I had that problem with one of my other scooters, I went to the Bando 723 belt instead if the 729 and the problem went away, no Change in top end
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Post by Deleted on Sept 28, 2016 8:25:58 GMT -5
Starter bendix can have bad springs and be too loose. To test, take it off and test if it closes fully from max position (little bit oil is good). If bushings are bad, bendix won't be giving good connection or in bad situation (starter won't turn).
When using shorter boss, you should use something to compensate the difference in the back of the variator.
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Post by dexameth on Sept 28, 2016 8:51:17 GMT -5
When using shorter boss, you should use something to compensate the difference in the back of the variator. Wait, so a shim behind the variator? I don't think this is right. If I put a shim behind it, won't it close the variator even more, like making the boss even shorter? How would this compensate? Please do explain. |
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and I got a 49mph top speed. RPMs were a little lower, barely too low. Just a tad bit heavy. After the test run there is a tiny little scar along the belt (I turned it around so I could have a clean slate). 
