Time to change my sprocket/chain or....?

[scharfg]

Hi there newbie again.

My buddy had a look at my rear sprocket at it looked like the teeth were getting somewhat pointy (ie: worn).When I bought the bike (~5 000km ago) Iunderstood the chain and sprockets were fairly new. My chain adjustment marker still has 50% adjustment left. Don't chain and sprockets for the most part wear evenly? So if I have 50% of my chain left to adjust shouldn't my sprocket have ~50% life left?

Is there a way of measuing the wear (ie: the space between the teeth etc.) to see if its within tolerences? I've looked at the drawings of warn sprockets but I'm still stumped on this issue.

I took a coupld of pics of my rear sprocket, I'm hoping you can have a look and let me know how it looks. I've got a 2 week trip planned and I want to make sure my chain and sprockets are not going to fail me.

If my sprockets and chain are pooched what is the best replacement brandand from where? How much am I looking at paying?

Should I change my rear sprocket # of teeth (stock is 43) while I have this chance or should I leave enough alone?

Thanks in advance folks!

 

[Yak_KLR650]

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Guy
I have had chains last less than 10,000 km and I have had them go over 20,000. Depends on maintenance, proper adjustment, lubrication, how much dirt on the chain, etc. If Brian says it is close, use it until just before our trip, then change. I paid about $150 (I think) for chain and sprocket set last time. Stick with stock for out trip, but you might consider a 14 tooth front sprocket for more technical terrain.

 

[ktmken]

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Hi there, I will see if I can shed some light on the sprocket and chain problem.
You can tell when a sprocket is wore out when it starts to "hook" Here is a picture of an extreme example.

This sprocket is wore out!
I have always felt that the chain will start to wear out before the sprockets show signs of wear.
A chain that is starting to wear out will require a lot of adjustment over a short period of time .
I read that a chain that is 2 1/2 percent longer than its original length is wore out.
One important thing to note is
Replace both sprockets and chain together. If you only replace the chain on worn sprockets the chain will wear very quickly. Also if you only replace the front or rear sprocket on a worn chain, the sprockets will wear very quickly.

If I haven't made any sense at all, read this

http://www.dansmc.com/rearchain.htm

KTMKen

 

[Guest]

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I found JT sprockets to last well and be reasonably priced.

Yes as YAK pointed out a 14 toother up front is better unless on the freeway.

Get a decent chain, preferably with O-rings or X-rings, as they help keep the dirt out.

Use a dry chain lube to keeep dirt from sticking so badly to it, i like Bel ray chain lube, but many brands are good.



Its best to replace both sprockets, and the chain all at the same time.



Cheers:hb:

 

[joker650]

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Since I got the new ride I have been using Chain Wax. I kinda like it. Lubed verry well and no mess on the new back rim :clap:

 

[scharfg]

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Thanks for the tips folks. Base on that my sprocket teeth are straight and do not cure/look like a shark's fin I'm good with them. I'll do the pull the chain away from the rear sprocket thingy under tension to check my chain health out.

Thanks again for all your assistance!

 

[edzzed]

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that is about the ugliest sprocket i have ever seen. my rear sprocket has 29,000 kms on it and looks like it'll go another 29,000. the chain and both sprockets are original. i use castol chain lube about evry 500 kms. i also purposely ride the bike some distance to warm up the chain and have the lube ready for when i get home. lube the chain while warm and it'll pull the lube into the chain. if you can picture a boat trailer, they say do not submerse warm axles as the water gets sucked into the bearings. same principle. Ed