Saturday, May 19, 2012

Chain And Sprocket Change in Bike

How to know when your chain and sprocket needs a change or are damaged?

There are a few symptoms chain and sprocket wear out:

1. You would feel that your wheel is not moving as freely as it used to move earlier.
2. You should get an irritating sound, or a a "tak,tak" sound.
3. Down-shifting would be a bit difficult.
4. It wont feel refined to drive the bike

How to check for chain and sprocket is damaged and needs change:

1. First open the cap on the chain cover, if you have one, or just check a slack in the chain by manually moving the tyre. The slack should be even, but if, you see different tension levels/slack, then its time to change the chain and sprocket kit.
Basic question: Why to change chain and sprocket both?
Answer: The sprocket is the part where the chain moves upon. SO, wear out happens on both of them simultaneously. The reason for chain/sprocket damage is that, the chain becomes elongated and the grooves on the sprocket become unevenly deeper/shallow.

2. If you would still like to go deep into the analysis, then, open the chain cover and the front sprocket cover.(The smaller one). You would notice wear-out, but in really worse cases.

Now, you have known that you need a chain and sprocket change, so here are few pointers:

1. Chain and sprocket generally comes as a kit by OEM (Original equipment manufacturers). The kit involves three things: (a) Chain (b) Front sprocket(smaller one) (c) Rear sprocket(bigger one)

2. Generally, for bikes less than 250cc the kit comes at less than Rs.1800. For Hero Moto corp the parts price is a bit cheaper.(E.g. Karizma ZMR has a chain and sprocket kit for Rs.971 only)

Hope this helps...

-Gaurav

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