Posted April 8, 201114 yr Hi, can anyone explain why my ybr 125 makes a "grating" noise when shifting down from 5th to 4th (this sequence only). I have changed the oil with yamaha semi-synthetic oil and is maintained regularly. any help appreciated!
April 8, 201114 yr Moderator Try increasing the revs with a little 'blip' of the throttle during ANY downshifting (not up shifting) it helps a lot
June 9, 201410 yr Hi. I have the same problem. i hear a noise when down shifting from 5th to 4th and the noise comes when i release the clutch. it seams that the noise comes louder when the engine is hot? any help pls? Thanks
June 9, 201410 yr Try increasing the revs with a little 'blip' of the throttle during ANY downshifting (not up shifting) it helps a lot why does this helps?
June 9, 201410 yr Because your trying to get a fast spinning shaft to connect to a slow spinning shaft and if you "BLIP" the throttle then the two shafts usually line up better than if you just bang it into gear. Look up a video on YOUTUBE if you really want to know how a gearbox works.
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