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Post by lain on Apr 27, 2015 20:22:18 GMT -5
I'm starting to believe it is not wearing down the top of the belt, there is no wear on it, but the side of the belt that faces the engine side seems worn down upon close inspection, and even a little weirdly angled. I need to measure it I suppose but it looks like the belt is slipping on the variator causing it to grind it somehow, not sure how. Maybe the variator is too smooth?
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Post by onewheeldrive on Apr 27, 2015 20:30:17 GMT -5
I'm starting to believe it is not wearing down the top of the belt, there is no wear on it, but the side of the belt that faces the engine side seems worn down upon close inspection, and even a little weirdly angled. I need to measure it I suppose but it looks like the belt is slipping on the variator causing it to grind it somehow, not sure how. Maybe the variator is too smooth? Usually the side of the belt that faces the engine is more worn down at a different angle because the variator moves inward and outward on that side. It just wears differently on that side. |
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Post by lain on May 1, 2015 11:50:11 GMT -5
So it turns out you guys are right, it wasn't the belt rubbing against the case that caused the buildup of what looked like belt dust around the variator. It turns out to be the variator slides, they keep cracking and breaking, however my old stock variator slides (I'm honestly afraid to use them since they have a lot of mileage on them and are worn) hold up like champs. So I am at a loss, am I just buying crapppy variator slides? Are most variator slides for 50cc not meant to hold up to a 100ccBBK? Can anyone recommend solid variator slides that can hold up to the extra torque but still fit in the 50cc variator for the 139qmb?
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Post by onewheeldrive on May 1, 2015 15:40:28 GMT -5
I haven't tried the dr pulley guides yet.
If the posts on your variator are shot, the guides probably won't last as long.
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Post by lain on May 1, 2015 17:22:05 GMT -5
I think the problem may be that the variator is slightly off balance, some of the inside was ground off by using the wrong backplate. I am going to just replace the variator with a performance variator that will include new slides and such.
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Post by steve on May 1, 2015 20:44:43 GMT -5
Just a thought....
Are you using 2 different weight rollers in your variator? Do you have them staggered correctly? That could cause your variator to go off balance. Have you weighed your rollers to make sure the factory didn't send one that is lighter than the rest?
I'm just tossing out ideas. Good luck.
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Post by lain on May 1, 2015 20:47:26 GMT -5
Nope, all my weights cuurently are 6.66g (no joke) all from the same set and everything and still the same issue where the plastic slides keep cracking and breaking. I will post a pic later of the variator and wear I am talking about.
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Post by geh3333 on May 2, 2015 0:50:44 GMT -5
Nope, all my weights cuurently are 6.66g (no joke) all from the same set and everything and still the same issue where the plastic slides keep cracking and breaking. I will post a pic later of the variator and wear I am talking about. Hey lain , your plastic v-slides breaking are caused by either a clutch or bearing issue. That's the main reason those break . I had the same issue . no matter what variator or what size weights , they would keep breaking. You will need to either change out the transmission bearings or try a different clutch. Bad news, but I bet that's what's happening. A set of bearings are about 25-30 bucks . you will keep destroying the v-slides and eventually destroy your variator. I went through about 4 - 5 variators before I finally replaced the clutch and the tranny bearings. I recently used the old clutch with no issues , so it looks as if the tranny bearings were bad. |
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Post by lain on May 2, 2015 1:02:50 GMT -5
Well I am using a brand new clutch, so must be the bearings? Is there any way to test them besides taking it apart and removing it?
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Post by geh3333 on May 2, 2015 1:57:31 GMT -5
Well I am using a brand new clutch, so must be the bearings? Is there any way to test them besides taking it apart and removing it? Not really, problem is you may have a couple that are going bad . I didn't have any that actually seemed real bad , but if you have two or three that are on there way out then that's just as bad as having one that is shot. There are six or so bearings in the transmission case that all work with each other . one on the clutch drive shaft , five in the tranny case that the gears work off of a and then you have the axle bearings. So actually there are more then six. Let's say the clutch drive shaft bearing is going bad and one or two other ones are also going bad . this means the clutch shaft will have some resistance , then add in the resistance from the bearings that help the gears turn . you now have enough resistance to cause the v -slides to brake. They suck pulling out also . I didn't have a puller small enough to pull the bearings , so I had to drill the inner part of the bearing out and after the balls fell out I was able to grab the outer ring and pull it out. Most came out with a homeade puller but one was a pain. |
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Post by geh3333 on May 2, 2015 2:00:49 GMT -5
Well I am using a brand new clutch, so must be the bearings? Is there any way to test them besides taking it apart and removing it? Not really, problem is you may have a couple that are going bad . I didn't have any that actually seemed real bad , but if you have two or three that are on there way out then that's just as bad as having one that is shot. There are six or so bearings in the transmission case that all work with each other . one on the clutch drive shaft , five in the tranny case that the gears work off of a and then you have the axle bearings. So actually there are more then six. Let's say the clutch drive shaft bearing is going bad and one or two other ones are also going bad . this means the clutch shaft will have some resistance , then add in the resistance from the bearings that help the gears turn . you now have enough resistance to cause the v -slides to brake. They suck pulling out also . I didn't have a puller small enough to pull the bearings , so I had to drill the inner part of the bearing out and after the balls fell out I was able to grab the outer ring and pull it out. Most came out with a homeade puller but one was a pain. Also if a bearing is going bad , you may not be able to tell unless its under load . that's the problem . |
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Post by geh3333 on May 2, 2015 2:03:17 GMT -5
I had a few extra bearings that I had left over . I ended up buying a couple then bought a whole set . I sent them to rcq in case he ever needed them . if I had more I would send them to you for free .
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Post by lain on May 2, 2015 2:04:49 GMT -5
I suspect you may be right. I have very slight metal screeching noises when I take off sometimes. There doesn't seem to be anything in the variator side that is showing any metal wear, but the end of the clutch rod where the seal is looks like it is rusting, and I did not see rust a couple weeks ago. Possibly bad final gear seal, maybe water got in? I'll have to check the gear oil, it's been about a year since I changed it actually.
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Post by geh3333 on May 2, 2015 2:15:51 GMT -5
I suspect you may be right. I have very slight metal screeching noises when I take off sometimes. There doesn't seem to be anything in the variator side that is showing any metal wear, but the end of the clutch rod where the seal is looks like it is rusting, and I did not see rust a couple weeks ago. Possibly bad final gear seal, maybe water got in? I'll have to check the gear oil, it's been about a year since I changed it actually. Oh man ! I always check mine . its common for the tranny case to leak around the seals . mostly the inner seal . but I always make sure my gear oil is OK. Ever since I changed the bearings and seals I haven seen any leaks. |
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Post by geh3333 on May 2, 2015 2:17:06 GMT -5
There are bearings in the swing arm also . the axle has inner bearings in the tranny box and the bearings in the swing arm.
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