How to identify / find out / spot sign of faulty chain sprocket

Almost all the Indian mainstream bikes / motorcycle use chain driven final drive. Where two chain sprockets are interconnected with a drive chain transfer the power from gear box to rear wheel. Different manufacturer provides different tentative life span of the chain sprockets and sets a change interval but this is a wear and tear part, which may last more than the said interval or need change well before the said interval depending on riding style, weather, terrain and maintenance given to it.

How can you identify / spot or find out the sign of a faulty chain sprocket of your bike / motorcycle ?

Best place to find answer is always your user / owners manual. Some of the bike / motorcycle makers provides an illustrated guide to help out the owner to identify the problem well ahead of any major problem.

Below is the example of a worn out chain sprocket vs a good chain sprocket, notice the teeth of the both as that is the best way to spot the damage and identify the fault.

One more visible identification would be the chain slippage. If the sprockets have worn out completely, then when you try to accelerate, the drive chain slips and rotates freely making a lot of noise.

How long can a chain sprocket last or when is the time to replace the chain sprocket ?

Usually this is a part, which needs replacement when faulty. There is no actual kms interval shown but usually 25000 kms can be expected as a normal life for your drive chain and chain sprocket. This value may decrease if you are careless about your drive chain maintenance.

How to maintain your drive chain properly -> Guide by

This article is applicable to almost all indian bikes / motorcycle, namely,

  • Bajaj Avenger A220 DTS-i / 200 DTSi
  • Bajaj pulsar 150 / 180 / 200 / 220 DTS-Fi / DTS-i
  • Yamaha FZ-16 / Fazer / YZF R15
  • TVS Apache RTR 160 / 180
  • Hero Honda Karizma (ZMA) / ZMR / Hunk / eXtreme
  • Honda Unicorn / CB Dazzler
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  1. Hello
    This is shreyas writing from Mysore,India.I have a R15 which is approx. 2 n a half years old and it’s time to change my chain sprockets.The original yamaha sprockets is a link-less chain which costs 2700/-.Where as Diamond and Rolan chain sprockets costs 1200/-. Which is the best one to buy? Both performance wise and economy wise. :) Please suggest
    Thank you :)

  2. Hi,

    I have pulsar 150cc and it is 2 and half years old. And it ran for around 9500kms. Now whenever I roll or ride my bike, I’m hearing a noise near to the chain and sproket area like kat-kat-kat. I have tighten and did the greasing of the chain also, but still it is coming. Can you please suggest if it is because of the faulty chain sproket. And if it is for it, then which company’s chain sproket will be better for my bike.


    • Well Sir the problem lies with the Chain Link or what we call Chain Lock.. Changing that will solve your problem..

      • Even i have the same problem,
        1, some mechanics say it is cause Chain tempo
        2, some say it is cause of the dust in the chain and the sprocket ( remedy i need to wash the chain with diesel and the use chain lube spray )

        I do not wanna go to the authorised service dealers, they are just a bunch legal looters.
        Is there any way i can sort out this issue myself, (note: rest all of it is good with the bike)

        @ Ankush, can you please elaborate a little more on the chain link stuff which you were mentioning earlier

    • Hi
      I Have the same problem .
      What is the solution you have taken for *Kat*Kat sound in rear sprocket….??

  3. Hi.

    Thank you for your previous mail, now i have doubt in Chain lubrication,
    I should go with motul Chain Lube or Chain Cleaner? As I am gonna travel from Coimbatore to Leh, I am thinking to buy and keep for lubrication purpose, or if you have any other choice or suggestions plz…

  4. i am getting problem in chain whenever i just ride my bike in 1 or 2 gear just hearing soung kattaatta kattatta……..sound just come from chain

  5. sir I am riding a yamaha fazer and the problem is with its chain sprocket .. there is some noise coming from it and more importantly the chain is tight at one point and if it is rotated for a half revolution then there it is loose .. I have got it checked by some mechanics and they replacing the chain sprocket will solve the issue
    ..please suggest the solution and also suggest the make of chain sprocket if replacement is needed…

    please reply

  6. Hi, I use Pulsar 135cc model and 19,000kms run. I am experiencing frequent slippage of chain in back wheel of my bike. I tried applying Greece but still problem persist. What could be the reason and how could i rectify this

    Thank you

  7. Sir
    Em planning to buy pulsar 150 cc 3yr old.
    I wud like to know is it mendatory to change chain and sprocket at this age?

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