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Old 1 Week Ago
bradlechy bradlechy is offline
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1997 ktm 125 sx

Does anyone know if the same yr 200 or 250sx cylinder will fit my 125 sx bottom end? I pretty sure some of the later models are interchangeable with each other

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Quote:
Originally Posted by bradlechy View Post
Does anyone know if the same yr 200 or 250sx cylinder will fit my 125 sx bottom end? I pretty sure some of the later models are interchangeable with each other

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250/300 barrels have never fitted on the 125 bottom end.

You could probably make up a 144 by fitting a 200 barrel on a 125 but...

We're talking a 22 year old bottom end here Brad, you and I know what it's going to do with a fresh top end making north of 40HP...a poo.
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I don't think there was a 1997 200 it wasn't released until 1998. The 1997 125 is a completely different motor to the 1998 125 and 200.

Even if your 125 is a 1998 you can't just drop a 200 cylinder on, you need to modify the bottom end with a different rod or fit a 200 crank.
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Old 1 Week Ago
bradlechy bradlechy is offline
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Quote:
Originally Posted by Nutty View Post
250/300 barrels have never fitted on the 125 bottom end.

You could probably make up a 144 by fitting a 200 barrel on a 125 but...

We're talking a 22 year old bottom end here Brad, you and I know what it's going to do with a fresh top end making north of 40HP...a poo.
It has a newer crank. Just took the jug off to freshen things up u top and started thinkin.....

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Old 1 Week Ago
bradlechy bradlechy is offline
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Originally Posted by Craigy View Post
I don't think there was a 1997 200 it wasn't released until 1998. The 1997 125 is a completely different motor to the 1998 125 and 200.

Even if your 125 is a 1998 you can't just drop a 200 cylinder on, you need to modify the bottom end with a different rod or fit a 200 crank.
Thanks for the reply.

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The easy way to tell is the 1998 models had PDS. If your bike has a linkage it is pre 1998.
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