Sprocket wear

[Mark65]

Hi
As my rear tyre is getting close to replacement time again i had a close look at the sprockets and chain and i think they are getting close to changing, however i m a bit confused as the chain is only on the 3rd mark on the adjustment and is still in excelent condition but the sprockets seem worn.
Now how mutch longer would i get from the setup as is?, the bike has 11 thou on it now, ive lookedfor o ring kits but they seem expensive with the afam the most expensive, any know where the cheapest place is to get the oring chain kit if i need one, its annoying because the chain lookes to have shit loads left in it. I have thought of just replacin the sprockets but that seems frowned upon.
Images attached, opinions please.
Thanks
Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[SoND]

There's still life in those sprockets, barely look sharp.

Changing sprockets on their own will accelerate the wear on the chain as they 'break in'.

Look at rear sprocket picture. Grab the chain inbetween the teeth around the 4 o'clock position and pull it away from the sprocket. If you're not able to move it (~2-3mm) easily then there's life left in it.
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Go back to bed - You have no rights - "Streetfighters ~ Mainstream motorcycling's crackwhore sister."

[Kickstart]

Hi

Front looks shot but the rear still has life in it.

I would be tempted to replace the set.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Walloper]

Do you regularly pin the throttle to the stops moving off?

I agree with Kickstart on replace set. (Chain and sprockets)

And stop nailing it....

ps You have just degreased that machine or Scottoiler?

It looks very clean.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Mark65]

Hi
I will try and and get a tad more yet out of it, the chain looks like that all year round, i wipe and oil it every 2-3 days and after every ride in rain with gear oil , seems strange the sprockets wear out but th chain has hardly any adjustment. And no for pinning lols on a ybr.
Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[Kickstart]

Hi

You have maintained the chain well (oil on the inside of the chain is the important bit). However short of an automatic chain oiler not much you can do to reduce the wear on the sprockets.

Normally front sprockets are made from far harder material than the rears to equalise the wear (~1/3 the number of teeth on the front so ~3 times the wear).

If you want to be a cheap skate then you could try a new front sprocket. However with small bikes a full set isn't that much compared to just the sprocket so long term no real saving.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Walloper]

[Mark65]

Hi
yamaha quote £99 for a kit , however i come across a genuine 05-06 kit for £45, yamaha say the only difference is the part number so the reckon it could just be a different chain, im waiting on comformation that the bargain kit is indeed a oring chain, any know if there is any difference or just marketing bullshit?.
Ta
Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[Kickstart]

Hi

Not sure. Check on JT Sprocket site for the sprocket fitments.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Walloper]

[cb1rocket]

[cb1rocket]

also is the original chain an o ring?

[Kickstart]

[Mark65]

yes my oem chain is a did o ring chain on the ybr

Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[Kickstart]

Hi

That is very surprising on a budget bike.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Mark65]

[Kickstart]

Hi

If that is the only difference then it would seem you just need a matching locking tab.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[neil.]

https://www.bitzforbikes.co.uk/DID_V_-_O_Ring_Chain_and_Sprocket_Kit_Upgrade-ref-17353-9254-2475.html

I've been using this over the last 9-10'000ish miles and it's been fine. I think the sprockets are JT ones as well.
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CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[Walloper]

[Walloper]

[Mark65]

[neil.]

[Mark65]

hmmm split link , did the split come with the orings as well for it and was it the same length chain?, sorry to be a pain, its either that or £30 off ebay for the 2 yamaha sprockets and buy a chain seperatly.
ty Also the Afam kit works out the same price would they be better?
Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[neil.]

[Mark65]

Thanks neil
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650