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Post by micka80 on Oct 11, 2014 0:56:29 GMT -5
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Post by niz76 on Oct 11, 2014 1:16:16 GMT -5
I have that same exact motor in my garage. It came out of an SMC vino?? still don't know what it is... Could just be me- or the camera, but does that fixed variator face look like it has "waves" in it? -not the moving side that you marked, the other side. I've been wondering about this motor- I read somewhere that it's as close to a "true" Minarelli as you can get. I have no idea if that's true, but it seems that the Chinese put the support bearing in the CVT cover for the clutch for a reason- wondering if the shaft isn't moving side-to-side. can you grab the clutch bell and see if there's any side to side movement in the shaft?
I keep finding SMC info from the UK. Are you in the UK?
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Post by micka80 on Oct 11, 2014 1:31:16 GMT -5
Wow, cheers for the quick reply, I have not worked out how to display my location but i am in australia. It must be the lighting in the photo because i can not see anything on the plates face and i can not feel any movement from the shaft. Can you see how the markings are not even toward the edges?
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Post by niz76 on Oct 11, 2014 2:51:07 GMT -5
That's pretty normal for stock vari. It's very difficult to get the belt all the way to the outer edge and usually takes some modifying to achieve. I've had a few belts "form their own shape" but they weren't sitting around without use much. Does the belt still have that shape after riding now? It should've gone back to circular/oval by now. How do your roller weights look? Flat spotted? I had a vibration in my scoot develop at a certain speed and it dissapeared when I did a gear swap...
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Post by micka80 on Oct 11, 2014 3:15:13 GMT -5
Yeah, you are right. The belt is a nice and round, the rollers are sweet, one weighs 6.9g instead of 7g. I am starting to suspect something in the gearbox oris it possible to have clutch shoes out of balance? Going to get a 41mm socket so i can take apart the rear assembly.
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Post by 90GTVert on Oct 11, 2014 8:29:43 GMT -5
Can you feel high or low spots in the drive faces? You can take a straight edge and hold it against the drive face in different spots to make any major imperfections obvious from the center to outside edge.
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Post by micka80 on Oct 11, 2014 17:18:27 GMT -5
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Post by x7rocks on Oct 12, 2014 2:06:21 GMT -5
Vibrations can at idle can be from a worn spring. Loose nut bolt on the clutch. Or loose cvt bolts.
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Post by micka80 on Oct 12, 2014 2:27:51 GMT -5
Update - did a bit more today, balanced the rear wheel as best i can and it has definately made it a lot smoother on the stand when revved up, it used to dance around the shed a bit. Removed a little washer between the sleeve and the outer half of the vari.
Vibration is still very prominent but now closer to 60kmh is its worse, still there above that speed though. I have noticed there is a bit of slop where the rear rim mounts the axle spline, again not sure if it matters. I have tried the best i could to feel for any play in the gearbox and i can not feel anything, same with the crankshaft.
I have noticed that this vibration does not seem to happen if i hit an incline at the same speed.
So i can rev it on its centre stand and not feel anything but on the road i can, hope this helps.
Edit - If i were to say change the roller weights would that make a difference, currently i have good acceleration and minimal bogging when approaching hills, it seems like it is dialed in but if i were to change to say a slider weight what would you recommend?
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Post by Sitticuss on Oct 12, 2014 4:37:47 GMT -5
I had a similar problem. It disappeared when I replaced the rear wheel and tire
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Post by micka80 on Oct 12, 2014 5:01:21 GMT -5
That does not suprise me, the rims look cheap and chinesey. How did you find out that was the problem?
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Post by Sitticuss on Oct 12, 2014 5:52:35 GMT -5
That does not suprise me, the rims look cheap and chinesey. How did you find out that was the problem? Like you I tried everything else... I ended up about the same time buying a scooter to restore and swapped the wheels on mine.
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Post by micka80 on Oct 14, 2014 0:57:37 GMT -5
Ok i will apologise in advance for giving mixed observations, it has been tricky for me to describe my problems accurately so it must be almost impossible for you guys to help over the net.
I have really been listening and feeling to the bike the last couple of days, trying different ways to ride the bike to see if it changes and i can now say i have a better idea of what and when it is happening.
WOT runs - twist throttle fully till i hit top speed and i get a pulsing like vibration bang on 50kmh everytime, uphill, flat or downhill, smoothes out a bit from 55 but by now it is vibrating not so much a pulsing/vibration. Hit 60+ and roll down a hill and all noises/vibrations stay until under 50.
3/4 throttle - ride the scoot at 3/4 or less throttle and i get no pulsing at 50+ and the vibration at 60 is very minimal. Again roll down a hill at 60+ and stays smooth.
So i have created a thread about cvt issues and yet now i am starting wonder if i am even looking in the right place. Please keep in mind the scoot has had very minimal use over the last 10 years.
Thanks again for any suggestions
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Post by micka80 on Oct 21, 2014 2:59:26 GMT -5
Update - Bike seems sweet now, it has been getting better slowly, it seems things are wearing into place or so i think. The vibration still kicks in but it is way less noticeable now after a couple of hundred kms of riding. The vari still has uneven travel marks on it but right now i am happy with it.
So in short i guess after sitting for so long this thing just needed a good run.
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Post by micka80 on Nov 2, 2014 2:26:08 GMT -5
Ok, so i can not seem to get rid of this vibration at and above 60kph. I can get rid of the 50kph resonating type vibration by using 6g instead of 7g rollers but i feel 7g pulls better, have yet to try heavier weights. Regardless of roller weight i get a very annoying vibration at 60kmh and above, almost feels like the bike is going to fall apart.
So i am thinking its a speed related issue, so i looking at getting a proper balance done on the rear wheel but looking over things i noticed a lot of sloppy fitting parts.
The inner part of the variators teeth look very worn compared to the key on the outer half, i am not so sure that this is an issue but worth a mention.
The axle that the rim goes on (not sure what you call it-drive/driven) i can pull in and out 1.6mm.
The rear wheel fits very loosely on the shaft, i can twist the rim on the axle up/down and side/side, the axle spline measures 16.35mm and the matching grooves on the rim are 17.12mm, again not sure if an issue as i can put an extra washer on there.
Also the pins in the torque driver are a lot smaller than the groove in the pully, there is fair bit of play in it, again not sure if this would cause any problems.
Sorry for all the different things i mentioned, just trying to get my head around whats going on without spending $$$$ on the wrong thing.
Lastly, at what speed does the average variator reach top gear and then speed is made up with engine rpm?
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