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DL650 In-gear whistling noise at 4-6 gear and higher rpm

2K views 4 replies 3 participants last post by  terryliu0301 
#1 ·
This morning when I rode to work I heard some high pitch intermittent whistling noise at higher gear (4-6) and higher rpm (above 3500). The sound became higher pitch and more frequent as rpm went up. It sounded exactly like when I release throttle and it jerks forward when engine breaking but this time it was consistent as long as it's in higher gear. This may have been happened for a few days as I did not notice as much due to wind noise.
I got this 08 650 last year as my first bike with 52k miles on it, didn't really have any issue until now. Any help would be appreciated!
 
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