Quote:
Originally Posted by goo
Can someone tell me what denotes end of life for sprockets? Mine are a bit shark-finished but how much is too much? I like to get my money's worth!
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"Shark-finned"you say?
they're done!
Sprocket wear will come in stages. Most riders won't recognize the early stages of sprocket wear. It's a bit subtle if you don't know what you're looking at. First indicator is a "sharpening" feel to tooth edges. You can FEEL this when compared to a NEW sprocket.
As edges get sharper, other things begin to happen over time, miles. Next up is the Shoulder area begins to show wear.
This is a area below the sprocket "valley" where the chain rides. You can see this on the right side Pic below. Not only is that sprocket "Hooked" (Shark Fin) it's also showing shoulder wear. Compare it to sprocket on left side. (same sprockets)
After worn shoulder area comes hooking ... and it is THIS POINT you need to plan for a change.
Here's the thing. Your front sprocket is always the first to wear out. Once its worn it will do quick work on your CHAIN and rear sprocket too. A worn front sprocket is VERY HARD on your chain, will wear it out much earlier than a GOOD sprocket will. The Chain, the most expensive component here, is the thing you want to protect. Sprockets are CHEAP by comparison.
Of course ... you could run cheap chains ... very "Penny Wise, Pound Foolish"
and also ... UNSAFE!
Keeping a fresh front sprocket on will extend chain life and add life to rear sprocket too. I change my fronts about every 8K miles or so. (easy to do on most bikes) My chains last 25,000 miles using this technique.
Not sure what the quality of chains and sprockets is on Enfields. If they are like most things made in India, then probably not great. But the principles remain, and swapping in a new front sprocket will help your chain live longer. So carry a few spares with you.
Front 525 Sprocket on left fairly new. Sprocket on Right side has about 10K miles on it. It's DONE. HOOKED with worn shoulders. I replace it to protect my $170 X ring chain. Sprocket is $15.
I think this guy got his money's worth out of this sprocket ... unfortunately it ruined his new chain and cost him a LONG ride in a truck.
There is worn out .. then there is BIG TIME shot. Both are examples or really poor quality sprockets that should never have been fitted in the first place!