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DT125R Forum -> Tuning -> bigger rear sprocket
Post Info TOPIC: bigger rear sprocket
danny boy


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bigger rear sprocket
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is there a bigger sproket that will fit a dt125 rear wheel, say off a yz or something?

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craigbulmer


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easier to take one tooth off the front sprocket.
http://www.wemoto.com/bikes/Yamaha/DT_125_R/01-03/picture/Sprocket_Front_Less_1_Tooth/

rear sprockets to fit DTs are harder to find. Dont fit off a YZ.

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danny boy


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Right, i have a 17 on the front and a 57 on the rear. how much difference will there be if i changed the front to a 15?

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plebpl


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front would pop up :D, you would have quicker acceleration but lower top end :)

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plebpl


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http://www.activeboard.com/forum.spark?aBID=66365&p=3&topicID=33447860


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craigbulmer


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alot, currently your set up for top end speed?

you will notice the acceleration increase for definite.
how much top end do you need in a field haha? id even be inclined to go for a 14t front if i was in a field .. you dont need much more then like 50ish top end. You would still get 65-70 easy with a 14t on the front.

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craigbulmer


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yeah the front would happily jump up :).
will be much more fun to ride!

btw you might have to modify your chain, unless you have alot of adjustment spare? you may have to take a link or 2 out..

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danny boy


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Top man! That's just the ticket!

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plebpl


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:/ 14t would be a wheelie monster. woudnt be able to rev it too hared in 1st and mayb 2nd.

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danny boy


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I thinks a 15t is in order!

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craigbulmer


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yeah might be pleb, but 15 wouldnt, would be sweeett :D

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plebpl


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give ti a go mate, cant hurt. worst case is you wasted a bit of money:/

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craigbulmer


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yeah £6.50, hardly alot.

but you wont regret it, its a field bike why does it need to be geared for top end!

have you ordered it? wemoto are very good, you would get it in the next 2 days.

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plebpl


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wemoto.com ftw

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danny boy


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wemoto wasn't working. every time i tried to order it came to the checkout and said 'my basket was empty'. got hacked off so i ordered it from motorcyle products ltd. couple of quid more but its ordered!

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craigbulmer


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oh right, could have rang them up, but oh well haha :)

yeah, you should notice a difference, for definite.

you may have to chop the chain, loosing 2 teeth will make it need a shorter chain.
but if your chain isnt fully stretched out, you might be okay.

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plebpl


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yeh should just be able to adjust it a few notches :)

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