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

colin13846 · Senior Member

What sprockets are you running on?

Cubber · Super Guru

13/48 on my TTR250 Colin.

I've read that a smaller drive sprocket has detrimental effects on the chain as the circle diameter causes the chain undue stresses.

There are a few sizes to pick from and Brian's article will help you choose what's right for you:-

Sprocket Info

Martyn

domski1 · Senior Member

I am running 14 / 44 and it's great for the road and easy trails but as Soon as it gets hard it's a propper struggle, I have just ordered a 48 rear to go on my spare off road wheel which might help a little.

Matt · Member

I run 13/48 offroad. On a new ttr the easiest thing to do is run 13/44.
On mine which I am dual sporting I'm trying 14/46. Sits on 100kmh without complaint.

tracker · Veteran Member

Used a 13/48 for years, had play in the s/arm because of the 13 tooth, the chain had worn thro the chain slider and the s/arm seal! Now have a 14/48 fitted.

colin13846 · Senior Member

Considering keeping the front 14t on and fitting a 52t rear, new chain and if this turns out too low then go 50 or 48 and then at least I can shorten the chain to suit if needed.

Lin · Senior Member

We have found 14/48 a good allround compromise and easy on the chain - so far.