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Post by lain on Apr 19, 2015 10:27:07 GMT -5
I found some issues with my CVT, needless to say I'm on my backup belt right now, about to install my backup variator and clutch as well... I feel the cause of the issue was due to using variator parts from 3 different sets. The variator I had in there was very light, and had some of the walls ground out by a plate I had on there that seemed to fit, but when in motion would slightly grind against the wall. After finding that out I put in a plate that was shaped perfectly for the job, but was from my first variator and very heavy, heavier than the actual variator. Since then I have been having belts and variator slides break. However my backup belt made my motosports has been holding up to all the abuse like a champ, and I've put most of my miles since last september on this belt. What I want to know about CVTs is; if you use parts from other sets with other sets that may be drastically lighter or heavier, can these cause imbalances in the way the CVT works and cause damages? Or should I be looking for something else? I read this link but it does not explain about things like this. |
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Post by tvnacman on Apr 19, 2015 10:45:08 GMT -5
as long as the parts you put in that rotate around the crank are balanced and the surface area are nic free it should not be causing any problems. It might be better if you can show us what your talking about.
John
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Post by lain on Apr 19, 2015 10:53:21 GMT -5
as long as the parts you put in that rotate around the crank are balanced and the surface area are nic free it should not be causing any problems. It might be better if you can show us what your talking about. John I'll take some pics |
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Post by ramblinman on Apr 19, 2015 13:10:07 GMT -5
pictures will be great! imo as long as the plates move freely/easily then you shouldn't have any problem mixing parts. i've had problem with a belt hitting the inside of the cover because the glides were worn out. this caused a great deal of friction making it difficult for the variator to open and close.
especially take pictures of the backside of the variator. i suspect mixing parts that were not the correct size may have caused extra friction and that will cause your belt to flop excessively hitting the cvt cover.
at least that has been my experience.
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Post by urbanmadness on Apr 19, 2015 13:24:02 GMT -5
The other thing to look at, is weights. Not all weights are the same width. Make sure they move freely in the ramps. You can mix and match weights, but they must be staggered.
Tuning the variator, of course makes a huge difference with these bikes. By and large the biggest bang for the buck on a 150 as the bbk kits don't make a huge difference unless you are stroking them.
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Post by lain on Apr 19, 2015 21:51:03 GMT -5
I replaced my variator with my stock variator, now my RPMs go all the way up to 9k. My fuses keep blowing too which is annoying. And I can smell the belt rubbing the case on the inside, smells like burning rubber when I start or go fast... Using 8.45 and 8.00g weights, staggered of course.
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Post by ramblinman on Apr 19, 2015 22:12:59 GMT -5
what part of the cover is the belt hitting? near variator, clutch or near the center? if the belt is hitting the cover near center then make certain both the clutch and variator open and close with little friction. if near variator or clutch then the belt is riding too high for some reason. and since you say you smell it at high rpm's then it sounds like it is riding too high in the variator. i've never encountered that problem so we will both have to do research to figure that one out.
9k rpm's is a bit much. you could increase the weights or install a stiffer contra spring. it's a balancing act when trying to tune the cvt.
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Post by lain on Apr 19, 2015 22:18:29 GMT -5
I'll have to look tomorrow. I just cleaned out the cvt too, so it should be easy to see...
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Post by geh3333 on Apr 20, 2015 1:56:52 GMT -5
I agree 9000 rpms is a little high, I'd try to keep her no higher the 8000 rpms , and that's down hill. I do disagree a little on the main clutch spring . a stronger main spring kepps you in a lower gear a little longer , which will slightly raise the rpms through out accel. When the clutch finally opens fully you should still be running at higher rpms. The only way I can every drop rpms is either taller gears or heavier weights.
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Post by lain on Apr 20, 2015 9:33:26 GMT -5
I agree 9000 rpms is a little high, I'd try to keep her no higher the 8000 rpms , and that's down hill. I do disagree a little on the main clutch spring . a stronger main spring kepps you in a lower gear a little longer , which will slightly raise the rpms through out accel. When the clutch finally opens fully you should still be running at higher rpms. The only way I can every drop rpms is either taller gears or heavier weights. That's exactly what is happening for me. The rpms raise by a lot as I accelerate, once I am on the road it will stay around 7k at around 30mph, but when i get up to 40-50mph im running RPMs at like 8-9k |
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Post by geh3333 on Apr 20, 2015 16:58:08 GMT -5
I'm guessing the belt you are using is wore out and causing the rpms to rise. When you say the plate , you mean the back plate that the plastic v slides fit into right.
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