Nasty sprocket damage!

7981 Views 50 Replies 14 Participants Last post by ukzx10r, Apr 24, 2017

ukzx10r

Discussion Starter · Sep 20, 2016 (Edited)

Update on page 4.
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After track day i noticed my talon rear sprocket has some nasty wear on it.
1 side only!!!
The outside edge has one tooth smoothed and one tooth gouged off all the way round.
Rear wheel appears to be lined up perfectly.
Chain and sprockets are as new. Maybe 100 miles old. All 525 pitch.

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1 - 20 of 51 Posts

dricked

· #2 · Sep 20, 2016

Is your spacer in behind the carrier there? Mine fell out once and I didn't notice, made a mess.

TennisFreak

· #3 · Sep 21, 2016

Is your rear wheel not aligned properly?

NixK7

· #4 · Sep 21, 2016

Certainly looks like something is not aligned correctly

tdh

· #5 · Sep 21, 2016

If it was out of alignment I would expect all the teeth to look like that. If it's only 1 or 2 teeth I would think either manufacturing defect or something got between your chain and sprocket for 1 revolution.

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BOP Leader

· #6 · Sep 21, 2016

Looks like alignment or dimension/thickness issue?

ukzx10r

Discussion Starter · #7 · Sep 21, 2016

Im so unsure whats caused this.
Its all the way round. 1 tooth gouged and 1 tooth smoothed all round.
Only on the outside.
I thought i must have lost the center spacer but checked tonight but it was there so now im stumped.

This is the alloy one left and standard sprocket right hand side.

These are all the wheel spacers from the wheel.
The wheel was almost perfectly aligned to within 1 or 2mm so hardly the cause.
The chain links are all ok and all move so no tight links.

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3

LDH

· #8 · Sep 21, 2016

Are you using a 525 Sprocket with a 520 chain?

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tdh

· #9 · Sep 21, 2016 (Edited)

Either that or did you press the plate on too far on the master link?

ukzx10r

Discussion Starter · #10 · Sep 21, 2016

All 525. Well it all said 525 on it. I can measure it i spose. How wide is 525 chain?

BOP Leader

· #11 · Sep 21, 2016

Is it me or does the left sprocket look thicker side by side compared to the right? The profile of sprocket teeth seem to look different.

Reactions: 1

LDH

· #12 · Sep 21, 2016

I do not have the between the plate measurement on the chains, but a

530 sprocket is basically 8.7mm thick and the distance between the plate would just be a hair over that

525 = 7.2mm

520 = 5.8mm

There are some tolerances between brands, but that will be pretty damn close and certainly good enough for you to measure and know what you are dealing with.

ukzx10r

Discussion Starter · #13 · Sep 21, 2016

Standard sprocket 7mm
Alloy one 7.45mm
Chain 8.1mm at narrowest point

LDH

· #14 · Sep 21, 2016

post a pic of your installed front sprocket.

Also what brand of chain is it?

ukzx10r

Discussion Starter · #15 · Sep 21, 2016

LDH said:
post a pic of your installed front sprocket.

Also what brand of chain is it?

Renthal lightweight front. Did chain. Talon rear sprocket. Had identical setup on my gen1

tdh

· #16 · Sep 21, 2016

ukzx10r said:
Chain 8.1mm at narrowest point

Did you check the width of the master link?

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scout

· #17 · Sep 21, 2016 (Edited)

If all as reported then out of alignment. Have to make certain that the alignment lines are lined up WHILE you can look through the AXLE. Looking thru the axle tells you to get your line of sight straight so that you don't dork the alignment. A baseline as we say in the science club. Do this on BOTH SIDES and THEN check after you tighten the axle nut as our Kawa corp likes the cotter key holes lined up. I noticed a long time ago that when I tighten past the torque specs to line up those stupid holes the RIGHT side goes OUT FARTHER than the left. And that is what you did assuming all variables that you mentioned are correct.

Interestingly, the only reason why I know any of the above is because of the Met rr rear tire grips far better than any other tire used. rr does not spin, or spins far less. But the cheap sprockets hate that met rr. I'll report all of this later when I put enough time on the vortex hardened sprocs. Up until the last few weeks I've ran nothing but spinning rear tires on the rear for years. Sprockets were happy, I guess.

I don't use the cotter pin, btw. and that nut has yet to move.

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obijack

· #18 · Sep 21, 2016

scout said:
If all as reported then out of alignment. Have to make certain that the alignment lines are lined up WHILE you can look through the AXLE. Looking thru the axle tells you to get your line of sight straight so that you don't dork the alignment. A baseline as we say in the science club. Do this on BOTH SIDES and THEN check after you tighten the axle nut as our Kawa corp likes the cotter key holes lined up. I noticed a long time ago that when I tighten past the torque specs to line up those stupid holes the RIGHT side goes OUT FARTHER than the left. And that is what you did assuming all variables that you mentioned are correct.

Interestingly, the only reason why I know any of the above is because of the Met rr rear tire grips far better than any other tire used. rr does not spin, or spins far less. But the cheap sprockets hate that met rr. I'll report all of this later when I put enough time on the vortex hardened sprocs. Up until the last few weeks I've ran nothing but spinning rear tires on the rear for years. Sprockets were happy, I guess.

I don't use the cotter pin, btw. and that nut has yet to move.

I use a lock washer in lieu of the cotter pin for my woodcraft axle sliders. They will not go on without the cotter pin out. Their kit comes with the washer. But yes the nut does not move. I have checked the torque spec many times.

Reactions: 1

Lanister

· #19 · Sep 22, 2016

When installing the rear wheel on the zx10, it's important to make sure that the long spacer inside the wheel's hub is properly aligned. It tends to tilt a little, which makes wheel installation challenging because the axle doesn't slide in easily, as it should. Now this might not affect the sprocket wear but when you had to hammer in the axle, your final alignment might be exactly where it should be and that will chew up your soft aluminium sprocket in a hurry. So before installing the rear wheel, put your fingers inside the wheel hub and feel for how the (tube-like) spacer is sitting in there. It's easy to align and it makes the axle slide in effortlessly. Another reason for such a wear could be chain slack but I would imagine you've checked for that.

ukzx10r

Discussion Starter · #20 · Sep 22, 2016

This is a little video of my sprocket carrier.
According to colchester kawasaki this is ok but im not so sure.
The casting is way out and im not sure it should have sideways play in it?
This could explain the damaged sprocket?
https://youtu.be/4wO6DWPQT0Y

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