ChinaRiders Forums - View Single Post - Hawk Rear Sprocket Failures

Megadan · 06-03-2017, 09:13 AM

Ok, so I am finishing up with my bike, going over the rear end right now and I do believe I have discovered why a few folks have had the kush drive bolts shear or the C-clip come out. I did not find this until I had the rear wheel off. With the chain putting tension on the sprocket, it did not move.

After installing my JT Sprocket....

For your own safety please check your bike, please please please!

After working with the stock Snap Ring, I do not believe these to be a weak point. Snap Rings are NOT intended to take lateral thrust loads, and if the sprocket has play like mine did, under power, it could be enough to eventually cause a failure.

Also, something I wish I would have noted in the video, make sure those kush drive stud flats - the ovalish shaped part that sits on the back side of the sprocket - are seated inside the channel on the back of the sprocket. If those are aligned wrong, one side will actually ride up on the outside of the channel and put a lateral load on the stud and it will not seat right to the hub.

06-03-2017, 09:13 AM	#1
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,029	Hawk Rear Sprocket Failures - reason why. Ok, so I am finishing up with my bike, going over the rear end right now and I do believe I have discovered why a few folks have had the kush drive bolts shear or the C-clip come out. I did not find this until I had the rear wheel off. With the chain putting tension on the sprocket, it did not move. After installing my JT Sprocket.... For your own safety please check your bike, please please please! After working with the stock Snap Ring, I do not believe these to be a weak point. Snap Rings are NOT intended to take lateral thrust loads, and if the sprocket has play like mine did, under power, it could be enough to eventually cause a failure. Also, something I wish I would have noted in the video, make sure those kush drive stud flats - the ovalish shaped part that sits on the back side of the sprocket - are seated inside the channel on the back of the sprocket. If those are aligned wrong, one side will actually ride up on the outside of the channel and put a lateral load on the stud and it will not seat right to the hub. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 Last edited by Megadan; 06-03-2017 at 09:49 AM.
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