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Post by tycomike on May 29, 2015 10:26:59 GMT -6
On my 150cc it's been running nice and fast so far this year. The other day I noticed a knocking sound. Not loud. But it was there when I was idling. Then today I noticed it again. It sounds like it's coming from the valve area. Then the scooter would stall at a red light. Are the valves loose? Thanks.
Mike |
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Post by Alleyoop on May 29, 2015 11:16:58 GMT -6
Normally the valves get tight and make no sound, if they are loose they will clatter pretty loud. But if it keeps on dieing coming to stops or low rpms it is usually the valves need to be adjusted. Set them both to .004 inchs.
Alleyoop
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Post by tycomike on May 30, 2015 17:40:33 GMT -6
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Post by Alleyoop on May 30, 2015 17:56:32 GMT -6
Video cannot be played, put it on youtube lot of us are not FB members.
aLLEYOOP
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Post by tycomike on May 30, 2015 18:14:26 GMT -6
Ok. I just uploaded it. Let's know if it doesn't work. Thanks.
Mike
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Post by Alleyoop on May 30, 2015 18:45:03 GMT -6
Rev it up some to see how the belt climbs and if the noise goes away. Hard to tell where it is coming from, the variator or the motor. This is a 150cc right? what size rollers did you put in.
Alleyoop
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Post by tycomike on May 30, 2015 20:04:44 GMT -6
The noise isn't heard when I rev it. It is a 150cc. I just put new 13gram rollers in. The chain by the rockers seems loose. I read on another site it could be a bearing. Any thoughts on that? Thanks.
Mike
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Post by Alleyoop on May 31, 2015 11:57:37 GMT -6
Ok to pinpoint where the noise is coming from get a screwdriver and hold the metal part(point) of the screwdriver on the valve cover and by the cover by the variator the noise will be amplified through the screwdriver and you may even feel it.
Alleyoop
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Scooter Doc
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Post by mike6736 on May 31, 2015 12:11:06 GMT -6
Old Indian Trick... Works great for motor noise locating
Magoo
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Post by Alleyoop on May 31, 2015 12:26:18 GMT -6
You betchy kemo sabi   |
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Post by czmdiver on May 31, 2015 15:32:23 GMT -6
Works every time. almost
Back in the days I was working on a IH 1428. Farm tractor.
428 CI Diesel Knocking.
Knock came from up top, Hmmm, was using Stethoscope.
It had spun a rod bearing and the Piston was hitting the head, the sound of the piston hitting the head seemed to cancel out the rod knock.
Just sayin.
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Post by tycomike on May 31, 2015 17:25:13 GMT -6
Ok. I just used a long screw driver and listened to different parts of the motor. I can't pin point exactly where it's coming from. Could it be the new weights? Would a compression test rule anything out? Or diagnose anything further? I plan on tearing into it more tomorrow after work. Thanks.
Mike
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Post by Alleyoop on May 31, 2015 17:45:21 GMT -6
Come on Bro, put the screwdriver wherever and then put your ear to the end on the handle wherever it's the loudest is it. But I would say it is your Variator because the rattling goes away when you rev it.
So I would take the Variator off and make sure the plastic guides are all in place and not broke.
Also when I asked what size rollers I meant the actual size not the gram weight 13. Size 16x13 18x20 19x14 etc;;
Alleyoop
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Post by tycomike on Jun 1, 2015 6:50:39 GMT -6
So the new weights are 18x14. The old ones are are 17.8x14. The sound is still there when I rev it. The plastic guides are good still. Going to tear into it more tonight. Thanks.
Mike
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Post by Alleyoop on Jun 1, 2015 10:50:20 GMT -6
The noise isn't heard when I rev it. It is a 150cc. I just put new 13gram rollers in. The chain by the rockers seems loose. I read on another site it could be a bearing. Any thoughts on that? Thanks. Mike Here you say the noise is NOT HEARD when you rev it which tells me its your weights. |
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..BAD TO THE BONE..
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