n2eus Posted June 26, 2021 Share Posted June 26, 2021 Does anyone have any insight regarding the source of this sound? The scraping sound occurs each revolution of the wheel. This sound has been gradually getting louder and is worse when pressing a right turn. Sounds like the valve stem scraping the shell. However, there appears to be adequate gap for movement of the valve stem. Quote Link to comment Share on other sites More sharing options...
EMA Posted June 26, 2021 Share Posted June 26, 2021 knock sound, it's a bearing misaligned. you probably have a defective side cover. 1 Quote Link to comment Share on other sites More sharing options...
n2eus Posted June 26, 2021 Author Share Posted June 26, 2021 (edited) 17 hours ago, EMA said: knock sound, it's a bearing misaligned. you probably have a defective side cover. In my case, I don't hear an intermittent knock. If the bearing shifts 0.25 inches (6 mm) the valve stem could conceivably contact the shell each revolution of the wheel. Is this what you are suggesting? Edited June 27, 2021 by n2eus Quote Link to comment Share on other sites More sharing options...
EMA Posted June 27, 2021 Share Posted June 27, 2021 did you remove the cap of the valve ? some inner tube valve are curved in a way they can hit the shell in some case like yours, i'm riding wo cap from the first day 1 Quote Link to comment Share on other sites More sharing options...
n2eus Posted June 27, 2021 Author Share Posted June 27, 2021 (edited) 6 hours ago, EMA said: did you remove the cap of the valve ? some inner tube valve are curved in a way they can hit the shell in some case like yours, i'm riding wo cap from the first day Yes, with cap removed the noise continues. Also, with gorilla tape holding the stem below the face of the motor cover, the noise continues. Yesterday I put toothpaste on the cap and rode in a circle while hearing the noise. Then I verified the untouched toothpaste was still on the cap. It appears something in the motor makes contact each revolution of the wheel. Edited June 27, 2021 by n2eus Quote Link to comment Share on other sites More sharing options...
EMA Posted June 27, 2021 Share Posted June 27, 2021 so if it's not the valve it's the knock issue of the motor Quote Link to comment Share on other sites More sharing options...
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