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Post by 90GTVert on Aug 26, 2015 6:59:17 GMT -5
Any changes in gasket material used or shimming (there's usually a shim on the intermediate shaft)? If you have it apart again, try a couple of test fits with and without a gasket and with and without a shim. Too tight and it will put a lot of resistance into the gearbox, but maybe your spacing is just a little off now? Gotta torque it down to see if it works so it takes a little time, but could be worth a shot if you dig in there.
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adlyman
Scoot Member
If you ain't pushing it, you may as well be pulling it!
Posts: 63 
Location: New Zealand
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Post by adlyman on Aug 27, 2015 2:53:41 GMT -5
My mates transmission sounded like that after a rebuild. Turned out he had left out a cir clip which allowed the bearing some small movement creating miss alignment with the output shaft. Luckily he found the cir clip and put things right before damage was done.
Straight cut gears are usually always louder and whine more than helical cut gears.
Good luck.
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Post by sobotek on Aug 27, 2015 16:55:57 GMT -5
Omg guys.. Can it be!  Today i was messing with my variator and rollers.. And when i was shimming my drive boss.. I sead to my self what the hell ill put one behind the variator to see what it does to my cvt.. Then i putt every thing back together and went to work.. At first i couldnt beleive it.. Butt no more high speed vibrations and a lot less gear whine.. Do you think that that could be a problem.. Miss aligned belt?.. Ill have to measure the clearence of the belt at the clutch side and on the variator side.. I hope that this is the problem.. |
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Post by sobotek on Aug 27, 2015 17:57:04 GMT -5
Any ideas of how to exactly measure the alignment of the belt.. Maybe from the case to the beginning of the belt?
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Post by iwiketuddlz on Aug 27, 2015 19:03:11 GMT -5
The belt would not effect the transmission when it's not running, and just spinning the tire like in your video... But maybe it will help the noise when riding I bet....
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Post by sobotek on Aug 27, 2015 21:04:57 GMT -5
Butt the thing is when i turned the wheel without the clutch on the shaft.. You almost couldnt hear the gears.. After putting the clutch and the belt on.. It moves the whole thing towards the variator and the the grinding noise begans to hear.. And then when i putt the cvt cover on.. the cvt cover bearing straightens the whole thing a little..and it stops being so loud.. Mind you when the cover isnt on the sound is a lot worse when turning the wheel by hand
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Post by 90GTVert on Aug 28, 2015 7:23:29 GMT -5
I just look straight down on the CVT and can use the case itself to see if the spacing of the belt front to back is about even.
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Post by sobotek on Aug 29, 2015 0:06:53 GMT -5
Salved!!!.. I had to shimm behind the variator with a total of 3milimeters.. And again change the clutch shaft bearing as well as cvt cover bearing..
Any ideas why this scoot is going only 40mph.. The thing is i read that basicaly almost every 2 stroke in a derestricted state goes about 40mph.. I have 3gram roller weights with technigas next r exhaust and when at 40mph im seing 7800rpm.. When i hit the throttle it goes up to 8500rpm butt then settles at 7800rpm.. Mind you with 4g sliders it goes somewhat the same just rpm are at 7400.. I have 1k contra spring aswell.. Thanks for your opinnion..
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Post by sobotek on Aug 29, 2015 0:08:12 GMT -5
I used to have a keeway hurricane with almost identical setup just the exhaust was a leovince zx.. And i saw peaks of 50-51mph
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Post by 90GTVert on Aug 29, 2015 21:40:58 GMT -5
Does it speed up with lighter weights so the revs can increase?
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Post by Fox on Aug 29, 2015 21:57:10 GMT -5
Wait so you put shims behind the variator back plate or behind the outer pulley half? Either way I fail to see how that would affect gear noise?
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Post by sobotek on Aug 30, 2015 0:08:03 GMT -5
To 90gtvert: i think the time to speed up is about the same.. I didnt measure it.. Butt i have a felling that in mid range its just building rpm and not going as it should..
To fox: i dont know either how that would help reduce gear noise.. I thought it would just flex the belt.. I took a 1cm and wide L shaped alumminum strip.. Placed it to the drive boss and it would not sit on the clutches deepest position.. Maybe the belt was pulling the clutch closer to the variator so the clutch shaft would not be straight.. Butt then again the cvt cover straightens it out.. I dont know.. All i know is i am hearing almost no whining.. Its still there butt not as loud as it was..
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Post by niz76 on Aug 30, 2015 3:33:50 GMT -5
3 even 4 gram rollers sound pretty light, and with a 1k contra sounds really light! The best thing to do would be to do the "marker test" on the variator and see if you're getting full belt travel. If you have some heavier roller weights you might want to test them out.
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Post by sobotek on Aug 30, 2015 16:02:07 GMT -5
I did the marker teat and it showed me 6mm to the top of variator.. Do you think a 1.5k spring will do the trick
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Post by katastroff on Aug 30, 2015 18:44:22 GMT -5
I did the marker teat and it showed me 6mm to the top of variator.. Do you think a 1.5k spring will do the trick Its the opposite. A stiffer contra spring will prevent even more your belt from travelling all the way up your variator. What you need are heavier rollers. |
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Today i was messing with my variator and rollers.. And when i was shimming my drive boss.. I sead to my self what the hell ill put one behind the variator to see what it does to my cvt.. Then i putt every thing back together and went to work.. At first i couldnt beleive it.. Butt no more high speed vibrations and a lot less gear whine.. Do you think that that could be a problem.. Miss aligned belt?.. Ill have to measure the clearence of the belt at the clutch side and on the variator side.. I hope that this is the problem..
