Knocking sound after attempted change and sprocket change

998 Views 26 Replies 7 Participants Last post by NewRedRider, 2 mo ago

ParvySage

Discussion Starter · 3 mo ago

Hello everyone,

I have a 2003 Cbr600rr. The chain and sprockets were quite bad and not changed for a while it seems (had the bike 8 months myself). There was very large ingress of grease built up all over.

The bike came with a new DID 525 chain. I purchased renthal 16t front and standard 525 rear sprockets.

Watched the videos and tutorials on YouTube and followed everything.

However I've now got a knocking sound from around the front sprocket area.

Searching hasn't found a definitive answer so far. I feel quite down about it now

.

Any advice would be appreciated.

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dannoxyz

· #21 · 2 mo ago

ParvySage said:
Hello,

Manages to take some measurements.

Original factory link = 20mm

My pressed master link:

Middle 19.5mm
End: 19mm

The master link is 1mm more pressed than the factory links. Is this too much of a difference?

Yup, definitely pressed in too much and causing binding of link.

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ParvySage

Discussion Starter · #22 · 2 mo ago

Hello everyone,

Finally finding some time to try and correct the chain. I've removed the over pressed linked and made a video just showing the general area of the bike. I'm also swapping my analogue vernier to digital ones for more accuracy.

The front sprocket has some play in it and rattle. Is this normal? Also the old original sprocket had rubber bushes on each side compared to the new one.

P.s. took an image of the over pressed link from birds eye.

Wheel Tire Bicycle tire Automotive tire Tread

Is it OK to turn the bike on without a chain and put it into first gear to make sure there are no knocks from the front sprocket and it is definitely chain related?

Thanks for your help guys!

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Mr.Cannon

· #23 · 2 mo ago

Your front sprocket turns your transmission so some noise and a little free play is normal.

Have you already checked your cush drive (rubber bushings) in your rear wheel for deformation also? Those rubbers shouldn't make a difference when spinning on the stand by may be apparent when you ride the bike.

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ParvySage

Discussion Starter · #24 · 2 mo ago

Mr.Cannon said:
Your front sprocket turns your transmission so some noise and a little free play is normal.

Have you already checked your cush drive (rubber bushings) in your rear wheel for deformation also? Those rubbers shouldn't make a difference when spinning on the stand by may be apparent when you ride the bike.

Hi Cannon,

I will remove the wheel tomorrow and make a video but it did all seem fine when I originally put it back together.

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tary preisser

· #25 · 2 mo ago

Some small side to side movement on front sprocket along splines is normal.

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ParvySage

Discussion Starter · #26 · 2 mo ago

Hello everyone,

Cush drive video:

Final video of reinstallation:

Images of flared link:

Bicycle Crankset Bicycle chain Bicycle part Rim

Bicycle Tire Wheel Crankset Bicycle tire

Tire Wheel Automotive tire Gear Bicycle part

I'd like to thank everyone that has assisted me in resolving my problem. Taken a while but it seems I've got there. Please let me know if the final video looks good to go.

For anyone needing help in the future:

CBR600RR 2003
Front Sprocket: Renthal 16t (315A-525-16P)

Font Data storage device Magenta Transparency Label

Nut torque: 40ft lb

when undoing the nut make sure bike is in neutral and on the ground. Press rear brake and undo nut slightly (don't remove), return bike to stand. This prevents any force on internal engine parts.

Rear Sprocket: Renthal 42t

Motor vehicle Font Vehicle Automotive lighting Automotive design

Rear sprocket nut torque: 43ft lb

Rear axle nut torque: 83ft lb

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NewRedRider

· #27 · 2 mo ago

That looks and sounds much better! The only thing I would add is next time you pull the tires make sure you grease the axles themselves lightly to prevent rusting. Also grease the inside of the wheel hubs. If you ride in the rain they will rust.

Ride it for a 100-200 miles and then recheck your chain tension. It looked maybe a bit too tight in the video because it appeared to be just short of touching the plastic guide underneath the swingarm when you stretched it up. That's been my basis of proper chain tension when it just touches the guide underneath. Once you ride it the chain should stretch a little so you may not have to adjust it at all. Other then that it sounds like you've got plenty of gear oil on the chain. That's a good thing. Remember the sound of a properly oiled chain as you can use it in the future as a guide.

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