A forum for owners of Yamaha TTR250 trail and enduro bikes!

Jordandenton · Veteran Member

Changing chain

Cubber · Super Guru

It's best to check with the maintenance manual for stuff like this, BUT you change the chain when it's loose and the sprocket's worn out.

What I mean by 'loose' is with the chain set at the proper tension, if you can pull it away from the rear sprocket more than about 1/4 inch or so, it's time to replace.

Sprockets wear quickly with a bad chain too, but it's harder to tell if their time is up though because the teeth could all be worn uniformly which makes it hard to know when it's time.

Some folk replace everything as a set, which I can't argue with.

A visit to the bike scrapyard should reveal what a worn out sprocket looks like - just replace yours before it looks that bad!

Martyn

TTRfan · Super Guru

Time to change that front sprocket when it looks like this wink

Worn front sprocket.jpg

As Martyn suggest, it is false economy to put a new chain on old sprockets but not so much the other way around.

I find that a chain and rear sprocket will need two front sprockets in their lifetime plus change the chain split link at the same time.

On some chains the first sign of wear is a loose roller or two and you then know its on its way out.

Brian

ttr steve · Super Guru

TTRfan wrote:
Time to change that front sprocket when it looks like this
As Martyn suggest, it is false economy to put a new chain on old sprockets but not so much the other way around.
I find that a chain and rear sprocket will need two front sprockets in their lifetime plus change the chain split link at the same time.
On some chains the first sign of wear is a loose roller or two and you then know its on its way out.
Brian

I recognise that wink wink wink

pug · Guru

Was that not a pic from the Taffy Dakar Steve how to get the most from a front sprocket. a wee bit of mig work an a good file will stop the slipping have a good week end up there an keep an eye out for clive from Treens think he is off up there last minute kind of thing. he might be on the TTr as well think the rest of his bikes are all Enduro bikes bar the lx500 so he will have to ride it

Martyn

ttboof · Super Guru

Always tempting to try a second run on sprockets .I've done it but find the life of the chain is much reduced

Good sprockets and a good chain last a long time on the ttr