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Knocking Rear Sprocket?? with video

sunnbmx

sunnbmx

2012-10-28 10:07:00 UTC

Good evening folks.

I'm in need of some advive.
I was cleaning and lubing my chain this afternoon and noticed a knocking noise.

I have a 2009 SD with 3000km on the clock. I checked that the carrier bolts were tight and that the rear axle bolt was torqued up correctly but still have the noise. It seems as though the sprocket carrier is moving slightly and causing the noise? I recorded the noise with my phone to see what people think. Does it seem normal?

If you turn up the sound and look at the clip you can hear what I'm talking about.

Thanks in advance for looking.

jmann

jmann

2012-10-28 10:21:00 UTC

I think you already know what you need to do next ...

sunnbmx

sunnbmx

2012-10-28 10:31:00 UTC

Nope. Can you tighten the sprocket carrier?

Colonel_Klinck

Colonel_Klinck

2012-10-28 10:57:00 UTC

Check
sprocket bolts are all tight
bearings in sprocket carrier
rubbers in wheel that sprocket carrier slots into

sunnbmx

sunnbmx

2012-10-28 11:18:00 UTC

Thanks Klinck.

Definitely a "back wheel out" job. Bugger.

KTM666

KTM666

2012-10-28 12:51:00 UTC

If the bolts are lose.......Lock tight the bolts.......look at archives to see what happens......if you dont

sunnbmx

sunnbmx

2012-10-28 21:51:00 UTC

Yeah, I'd seen some old posts and saw the damage a loose bolt can do. I checked those first but they were all tight.
Thanks

Hotbrakes

Hotbrakes

2012-10-28 23:17:00 UTC

That's a normal click from the cush drive.

omky756

omky756

2012-10-30 01:48:00 UTC

Make sure all your bolts are to spec...then....remove the rear wheel...pull the sproket carrier from the wheel...apply wheel bearing greese to both the studs that fit into the cush drive and the mating holes of the cush drive....reinstall..noise will be gone or changed big time. Repete every 3K miles. Been there, done that.

sunnbmx

sunnbmx

2012-10-30 01:53:00 UTC

Post missing.

Hotbrakes

Hotbrakes

2012-10-30 07:32:00 UTC

Thanks for the advice folks. I pulled the wheel off to inspect last night. It looks like the whole sprocket carrier rattles towards and away from the wheel by about 2-3mm. Does this sound normal to anyone who has removed their rear wheel?

sunnbmx

sunnbmx

2012-10-30 13:56:00 UTC

Post missing.

Linga

Linga

2012-11-04 08:40:00 UTC

Thanks for all the advice! Yep turns out everything is normal so the brains trust is correct again