250 vs. 300 header size

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02-22-2009 | 06:33 PM

TrailCruiser

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Joined: Jan 2009

Posts: 20

From: Vancouver, WA

250 vs. 300 header size

Can anyone confirm that there is a diameter difference between the stock KLX250S and KLX300R headers? I just measured the O.D. of my 250 and it is just a bit under 1.25". What's the 300?

02-22-2009 | 06:59 PM

mandark

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Joined: Oct 2008

Posts: 200

From: Memphis

1.5" iirc

02-22-2009 | 07:15 PM

yugaiw89O

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Joined: Feb 2009

Posts: 11

From: Redondo Beach

they're both identical; all that's different is the length of the 300 header is a bit longer and will not work on the 250S unless you have a 300 specific muffler as well.

02-22-2009 | 07:21 PM

GreenMonsta

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Joined: Jul 2008

Posts: 229

From: MA

Both the 250 and 300 are 1 1/4dia the 300 is about 1" longer. The black pipe is a full 300 system i got off ebay for like 75$ with one of my home made end caps on it.

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