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Post by manisobsolete on Oct 23, 2011 18:02:19 GMT -5
I just got a 1999 Yamaha Jog with 3000 miles. It's in great shape, runs perfectly.
There is a sort of grinding noise when I start the scooter. Happens with and without rollers installed. I'm new to 2 strokes, so I'm not sure if it's normal.
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Post by 90GTVert on Oct 23, 2011 20:09:13 GMT -5
:welcome: to the fourm.
It does sound like metal on metal. If it still does that with the belt installed, I'd suggest inspecting the start clutch and gears (behind the variator). Check it all over and look for signs of abnormal contact.
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Post by speedy1125 on Oct 23, 2011 20:51:33 GMT -5
you mean they are not supposed to sound like that? my 4t QMB has sounded like that from day one. 4000 miles now and still starts everytime and still sounds the same lol
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Post by 90GTVert on Oct 23, 2011 20:57:36 GMT -5
It sounds loud and high pitched to me, but maybe it's just the video. It's normal for them to make some noise.
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tango
Scoot Enthusiast
Ad agendum semper parati
Posts: 389
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Post by tango on Oct 24, 2011 0:46:17 GMT -5
I'm with Vert on this. That sound is coming from either the variator or the starter clutch. It can't hurt to check. While you're in there, if you have to remove the starter clutch, be sure to check and clean the three crevaces that the roller bearings sit in as well. My roller bearings kept falling out until I cleaned those crevaces and got the actuators to work. Their function is to hold the roller bearings in place. If you're afraid of things falling all over the place and are not as mechanically inclined to remember what goes where, take pitcures at every stage. Come back here for help if you need it.
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Post by manisobsolete on Oct 25, 2011 23:17:55 GMT -5
I took it apart and carefully put it back together, and the noise is mostly gone. Thanks for your help.
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