Whurling/buzzing noise after adjusting the chain

[pirate694]

I have recently adjusted the chain on my 04 GS500. I have made sure that the wheel was aligned(The little ticks marks are the same for each side). What I did is pull the wheel back towards the engine then slowly pulled it out to where chain had about 1 inch of slack. After I have done that, I have noticed odd behavior from my bike. When I slow down and use back brake within 15mph and 10mph range I feel lots of vibration of on and off kind of like whuuurl........whuuurrl.......whuuuuurl.........whuuuuuuuurl. Sorry It is bit difficult to sound it out in text :/. I have checked tire pressure and it is good. Bike is not pulling and is riding smooth. Chain is lubed. Sprockets look good... I have readjusted it again today to no avail... starting to run out of ideas.... Oh yes, I did search for this problem online I cannot find anything that comes close.

[Soloratov]

Is the slack on the top or bottom of the chain? Sounds like it's too loose. Too tight and you would get a decent amount of resistance when you spin the wheel when the bike is up on the stand.

Also...make sure that wheel axle nut is torqued properly. Too loose, or too tight is very bad.

[The Buddha]

Chains stretch unevenly. It has to have 1" @ the loosest spot.
Cool.
Buddha.

[pirate694]

Is the slack on the top or bottom of the chain? Sounds like it's too loose. Too tight and you would get a decent amount of resistance when you spin the wheel when the bike is up on the stand.

Also...make sure that wheel axle nut is torqued properly. Too loose, or too tight is very bad.

Slack is at the bottom of the chain at the midpoint between 2 sprockets. I have rotated the wheel and checked and it comes to about 1 inch all around. Wheel spins freely and does not have too much drag on it (I hear little noise from brake pads). And how loose is too loose or tight is too tight? I do not have torque wrench so I use a monkey wrench to get the bolt on and off. When I tighten it I dont torque the crap out of it but its not loose either.

[adidasguy]

Chain might be too tight. Sit on the bike and have someone check the slack in the chain. It will be tighter when you're sitting on the bike.

[Soloratov]

+1 for sitting on it.

As is sags it will tighten up.

As for the axle nut...you might be very surprised how loose it actually is doing it that way. I did the same thing, and rode to work (38 highway miles) to use the torque wrench. That things spun around a lot before I ever got to the click.

[pirate694]

I will check it out tomorrow and let you guys know. I have a torque wrench just not the fitting to fit the socket and the bolt.

[radodrill]

Slack is at the bottom of the chain at the midpoint between 2 sprockets. I have rotated the wheel and checked and it comes to about 1 inch all around. Wheel spins freely and does not have too much drag on it (I hear little noise from brake pads).

Are you checking this on the center stand?  Chain should be adjusted with both tires on the ground.

[pliskin]

Do not use the adjuster tic mark to align the wheel. It's best to use a measuring stick to measure. Make sure you have the same distance to the mm by measuring from the center of the swing arm piviot to the center of the rear axle bolt. Those adjusters are not accurate because the bend when the bolt is tightened. Measure again after you tighten every thing up and take it for a ride. Make sure you measure it after a few hard accelerations and rear brake stops.