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Post by jhobe6678 on Nov 2, 2014 8:20:43 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? By the sounds of it, all of that can cause major problems. If you could, take some pictures and post them? Especially of the Variator teeth and the splines on the shaft. As for the tire, you don't want it wobbling around I'd think. This isn't just performance issues, these are safety issues I feel. Please, be safe and if you see things aren't fitting together right or there's play in a wheel/axle/drive shaft, don't ride it if you don't have to until you talk to someone who knows what is going on and how to fix it.
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Post by micka80 on Nov 3, 2014 3:53:02 GMT -5
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Post by oldgeek on Nov 3, 2014 6:07:14 GMT -5
I would definitely try to get the rear wheel tighter using washers or something.
I had a vibration that moved around a bit with RPM. Finally got rid of it with a gear swap. Figured out mine was a problem with a primary shaft. (clutch input)
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Post by 54cc on Nov 3, 2014 16:20:55 GMT -5
i think maybe your back driven pulley bearing might be going out with that clutch wobble. take the clutch off and grab the shaft and look for play. move it around in directions its, not supposed to go. the bearing behind the clutch and behind that black seal there. in the transmission final drive cover. or maybe a bearing inside the final drive is out. something like that.
i dont think the pins and the thing you where showing is any problem.
with enough miles to take out yoru bearing, i would freshen up the variator too, with a set of slide guides, a new set. if you havent changed them out recently. i wouldnt use a set of those over for 5000 miles. about as much time as you would use roller weights, but noone replaces them..
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Post by micka80 on Nov 5, 2014 2:13:52 GMT -5
Scoot has only done 1500 km's. There is no slop on the input shaft although i feel a bit of slop/lash between the gears and apparently the output does have a bit of give in it which is normal.
Installed a tach today and did some tests, still need to do more until i see steady figures, at this point it seems by removing the thin washer between the vari plates changes the speed at which the issue starts - 55kph washer in, 60kph washer out? Or at 10 000 rpm it kicks in. I'll keep testing as i would hate to think how much new gears and bearings would be.
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Post by 54cc on Nov 6, 2014 4:01:57 GMT -5
think you figured where your sounds are coming from. if it wobbles, its bent or bearings are out. i think bearings. if the driven pulley shaft is solid then check that driven pulley the thing the clutch you cram it onto there.
somethings not turning straight and i think thats your sound. they dont wobble like that they spin very fast and will throw itself off if you dont fix it.
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Post by micka80 on Nov 15, 2014 4:24:29 GMT -5
Update - solved. Problem was the rear pulley/torque driver, apparently it was serviced but i gave a good dose of carby cleaner until it was completely rid of grease (hard chunks were coming out), got the bearings spinning nice, then regreased and there it is, bike runs so smooth and revs are way lower at top speed. Thank god it was not the gears as this is still a near new scoot mileage wise.
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Post by Sitticuss on Nov 15, 2014 8:05:08 GMT -5
Glad you got it figured out. Happy scooting....
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