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Post by RyanWiltshire on Nov 20, 2022 11:52:58 GMT -5
Tried 3 different variators, 2 different contra springs, changed clutch springs and still the same issue Springs used for the Contra/Pulley - Polini Torque Springs/ Evo Slider +40% (28kg) and +87% (37kg) - Clutch Springs are the Blue Polini ones, strongest ones you need for the Polini 3G Evo Clutch Variators Used - Malossi Multi Var - Polini Evo Hi-Speed Var - Stage6 Sport Pro Var now, it seems all variators seem to have this distinctive black Circle around where it finishes climbing, I do notice around 55MPH when I let off the throttle I get insane amount of vibrations like the belt is vibrating like crazy coming back down the variator face. it's a yamaha aerox yq 50, with an Airsal 50cc Sport kit just for clarification if you look at the images, these are two different variators, with shocking amount of room left on the face for the belt to climb and use. any ideas?
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Post by Zino on Nov 20, 2022 14:02:44 GMT -5
thse variators with matching drive faces will get under 3mm left the dark residue ground in and the vibration after you left off suggests belt slip In this picture i am pointing out shimming This has more shimming than i like ,It is closer to perfect without a shim Look at your belt with the pulley off I set the belt at rock bottom so the inner edge of the belt is close to even with the end of the drive boss Sometimes with shimming to get proper spacing for the kickstarter castle nut I put the shims behind all the variator parts next to the starter clutch
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Post by TuneGoon on Nov 20, 2022 14:03:08 GMT -5
How does the rear final drive look in regards to wear and belt travel? Just shooting from the hip, my first instinct is to suggest checking the shims on the boss of the Variator. Too much of a spacer can cause this kind of short travel on the Variator, but it should be appearant on both variator and final drive faces. Also, if your final drive doesnt open freely at rpm (even with different rated contras) there may be a friction issue with the pins on the final drive. Could be worn or just need some grease.
Also, in your last pic....might just be the angle of the pic but that boss looks like its not perfectly rounded/centered in the Variator? Are you using the same boss for each variator? This could possibly explain the vibrations youre feeling if it isnt perfectly round and being shared between all of the variators?
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Post by TuneGoon on Nov 20, 2022 14:04:16 GMT -5
Zino beat me by mere seconds lol
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Post by RyanWiltshire on Nov 20, 2022 15:40:45 GMT -5
I did just put a new variator from stage6, it come with two shims. I also noticed my kickstart gear doesn't correctly attach to the castle/cog to kick it over, I know my multi var from malossi come with a thick spacer to put behind the variator and next to the electric starter gear/clutch. this is the first time ever putting in shims, but without the two shims, the front variator plate, is lose and won't be tight without them and its got a lot play...with the two shims there is none so I am guessing they're needed due to spacing issues anyways.
so do you suggest more shims? I always assumed adding shims would make the issue worse and the belt to not travel all the way?
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Post by TuneGoon on Nov 20, 2022 18:36:05 GMT -5
If you put shims on the face of the boss you are essentially making the boss longer (as pictured in Zino's post). You affect the travel of the belt -both variator + final drive AND how well the kick start ratchet gear(?) engages. If you put the shim behind the variator, you affect variator belt alignment to the final drive and how well the kick start ratchet gear engages. Does your kick starter skip or not engage at all when used? If so, you definitely need some shim work. If you remove a shim from the face of the boss (like in Zinos pic) you will allow the belt to travel further up in the variator, but less in the final drive. This should make your top end slightly better but also take away slightly from your low end acceleration as a result. It truly is a balancing act. First things first though is make sure that the variator is aligned corectly with the final drive. Once that is good, then adjust any changes in shims on the face of the boss. **Careful not to go too shallow with the boss/shims as you can start to get into the splines of the crank with the variator nut....no bueno. Not my picture, but a good reference to what I mean:
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Post by Zino on Nov 20, 2022 19:15:03 GMT -5
take a picture of your belt with no shims and then with 1 and 2 shims So i can see how close to the end of the boss it is . What belt are using ? stock yamaha belt works perfectly with the after market variators you have tried
Have you ever done a sharpie test for the rear pulley ? To see how far the belt is getting to the middle Your rear pulley may not be opening far enough for the variators to get full travel.
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Post by RyanWiltshire on Nov 21, 2022 3:36:39 GMT -5
take a picture of your belt with no shims and then with 1 and 2 shims So i can see how close to the end of the boss it is . What belt are using ? stock yamaha belt works perfectly with the after market variators you have tried Have you ever done a sharpie test for the rear pulley ? To see how far the belt is getting to the middle Your rear pulley may not be opening far enough for the variators to get full travel. once I am back from work I will post many pictures to give you guys a more understanding of what my belt and variator etc looks like. but I can't use the stage 6 variator without the 2 shims due to the front plate not fitting snug, i.e when I put the crank knut on, kick start cog, front plate, it's all lose and wobbly, which is not good. when I put the two shims on the front of the boss, it fits all snug like it should. I don't have this issue with the malossi multi var as it comes with a ring which they say to put behind the variator. polini hi speed evo fits with out a spacer and shims. I haven't done the sharpie trick on the pulley, but I have variator and you can see from the pictures with sharpie how far the belt travels. I will try the pulley though. but first send the pictures you guys ask for...also, is there ways I can send/post videos?
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Post by aeroxbud on Nov 21, 2022 5:16:34 GMT -5
take a picture of your belt with no shims and then with 1 and 2 shims So i can see how close to the end of the boss it is . What belt are using ? stock yamaha belt works perfectly with the after market variators you have tried Have you ever done a sharpie test for the rear pulley ? To see how far the belt is getting to the middle Your rear pulley may not be opening far enough for the variators to get full travel. once I am back from work I will post many pictures to give you guys a more understanding of what my belt and variator etc looks like. but I can't use the stage 6 variator without the 2 shims due to the front plate not fitting snug, i.e when I put the crank knut on, kick start cog, front plate, it's all lose and wobbly, which is not good. when I put the two shims on the front of the boss, it fits all snug like it should. I don't have this issue with the malossi multi var as it comes with a ring which they say to put behind the variator. polini hi speed evo fits with out a spacer and shims. I haven't done the sharpie trick on the pulley, but I have variator and you can see from the pictures with sharpie how far the belt travels. I will try the pulley though. but first send the pictures you guys ask for...also, is there ways I can send/post videos? If you put the video on YouTube. You can insert the link using the clap board symbol, seventh from the right at the top of the reply box.
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Post by TuneGoon on Nov 21, 2022 5:31:25 GMT -5
You can shim more from behind the variator to get that kick start spacing correct without shimming the front of the boss and changing the belt travel in the variator (causing it to stay low in the variator like it currently is). Kinda sounds like the way you have it now, you are compensating on the front of the boss with shims when you should be shimming more behind the variator to fill that slack between the kickstart. Pics/video will def help though. As for videos, I think you may need to have them hosted somewhere (youtube/etc.) to post them here?
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Post by RyanWiltshire on Nov 21, 2022 11:40:05 GMT -5
You can shim more from behind the variator to get that kick start spacing correct without shimming the front of the boss and changing the belt travel in the variator (causing it to stay low in the variator like it currently is). Kinda sounds like the way you have it now, you are compensating on the front of the boss with shims when you should be shimming more behind the variator to fill that slack between the kickstart. Pics/video will def help though. As for videos, I think you may need to have them hosted somewhere (youtube/etc.) to post them here? uploading the video now guys
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Post by RyanWiltshire on Nov 21, 2022 11:51:46 GMT -5
sorry for the rambling, I was talking to myself and also trying to get some information across to you guys.
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Post by FrankenMech on Nov 21, 2022 13:36:47 GMT -5
-Private Video-
Have you tried a new belt? A worn belt will cause problems like you have.
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Post by RyanWiltshire on Nov 21, 2022 14:06:13 GMT -5
-Private Video-
Have you tried a new belt? A worn belt will cause problems like you have. well ive been through a few variators trial and erroring and had 3 new belts with the variators, the issue still persists even with a new belt etc
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Post by aeroxbud on Nov 21, 2022 15:39:44 GMT -5
You have to change the setting for the video to public
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