Could be literally anything. I know the timing chain tensioner is very common to wear out on those motors and cause a winding/ ticking noise but thats on the right side. Ive replaced several on those myself over the years. You can try to tighten it manually the slightest bit. If the noise goes away replace the tensioner don’t continue to drive it like that.
SOURCE: Noisy 5th gear
but no there was definitely a loud whirring noise in 5th gear sort of like a very noisy bearing. The bike still ran in 5th but it was definately becomming increasingly noisy. When I changed down to 4th the noise went away even if I slowed to the rev range I had been cruising in 5th. Same story with the other gears, but the noise returned with a vengence in 5th. Needless to say I rode the rest of the way home in avoiding 5th. Any ideas? I suppose I'm looking at a gearbox strip? Could the noise be anything else? ,Had a similar issue with my 1000S, only 5th gear was noisy - a sound like a dry bearing -other gears were silent. Bike had done 70,000kms and serviced correctly. Had Barry from IME check it out. Turned out to be both 5th gears needed replacing - looked like the case hardening on the gear faces was eroding and pitting. New gears went in and the box properly shimmed and happy to say 6000 kms later all still silent in the gearbox department. Plus the added benefit of slicker gear changes.,,,
SOURCE: 1997 yamaha yzf 600r electrical problems
a jump box is nothing more then a battery with leads on it so where are you connecting it verses the new battery you put in the bike. that doesn't make since unless you are connecting the box right to the starter motor then it be constently running the motor untill you unhooked it. check all your fuses and examine all wire harnesses for damage, burns, or any mellting.
SOURCE: 2001 yamaha r6 keeps going dead! Stator,regulator or something?
you need to check for a short if its not that then it could be your altinator or a regulator box
SOURCE: when driving the wheels or car make a winding noise and when slowing down to stop
click these links for more info and just go through the sites....
link 1
Link 2
Thanks
Good Luck
Appreciate to rate as "Fixya"
SOURCE: 2001 yamaha yzf-r6 with a running problem
Pull the slides from the throat of the carbs, Move the clip on the jet needles one notch lower, two notches at the most. Simple and didn't cost $400.
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