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Technically Speaking => Chains & Sprockets => Topic started by: Speedy1959 on Sunday, 07 May 2023, 10:20 PM

Title: Rear sprocket was loose
Post by: Speedy1959 on Sunday, 07 May 2023, 10:20 PM
Blimey...
Was lubricationg my chain after a ride out and noticed a sprocket nut and stud was unwound be about half an inch!!
I checked all of them and ALL were barely tweaked up..
Never had a sprocket loosen itself before..
To be honest if I hadnt seen the stud / Nut unwound I may never have checked them!

S
Title: Re: Rear sprocket was loose
Post by: Tally on Monday, 08 May 2023, 12:06 AM
Lucky escape there speedy, that could have been a catastrophic failure to proceed. That could have been the ER or the morgue. It proves regular checks and maintenance can save your life.
Title: Re: Rear sprocket was loose
Post by: KiwiCol on Monday, 08 May 2023, 04:45 AM
Those sprocket nuts are (or should be) lock nuts, so they can't come undone.  Are the right ones fitted Si?
Title: Re: Rear sprocket was loose
Post by: Hooli on Monday, 08 May 2023, 06:40 AM
Ive seen a stud unwind on a VFR, it'd eaten halfway through the single sided swingarm before getting noticed.

The loon rode it around Europe for another week at high speed before heading home.
Title: Re: Rear sprocket was loose
Post by: Speedy1959 on Monday, 08 May 2023, 09:48 AM
Quote from: KiwiCol on Monday, 08 May  2023, 04:45 AMThose sprocket nuts are (or should be) lock nuts, so they can't come undone.  Are the right ones fitted Si?

Hi Col,
They seem to be the correct ones.. Bikes only done aroumd 11k miles so is still on the original chain / sprockets.
I sprayed the threads of the studs and the nuts with brake cleaner then a leberal dose of Locktite removable.

Thankfully the unwound stud hadnt reached the swing arm..
I dont know how long the nuts have been literally finger tight..

Thanks for your comments..

S.
Title: Re: Rear sprocket was loose
Post by: gsxbarmy on Monday, 08 May 2023, 04:42 PM
Given they are the original nuts that's very worrying Simon. For safety, I'd consider purchasing a new set of OEM lock nuts and replace those in place

Good job finding that though 👍
Title: Re: Rear sprocket was loose
Post by: Tony Nitrous on Monday, 08 May 2023, 04:46 PM
Well saved !

Never seen it with stock parts.
I know a couple have done it with aftermarket anodised bling that wasn't suitable.
Title: Re: Rear sprocket was loose
Post by: grog on Monday, 08 May 2023, 05:35 PM
Maybe the factory Suzuki bloke was the same one that did front caliper up on my bike. Finger tight also.
Title: Re: Rear sprocket was loose
Post by: Tony Nitrous on Monday, 08 May 2023, 08:28 PM
Quote from: grog on Monday, 08 May  2023, 05:35 PMMaybe the factory Suzuki bloke was the same one that did front caliper up on my bike. Finger tight also.

Who ever he was he wasn't busy putting grease in my steering head bearings...  :frustrated: