tm40 carby on xr

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tm40 carby on xr

Post  giantpiggy on Mon Oct 19, 2009 4:48 am

I recently purchased a tm40 carb for the piggy,any heads up on rough estimate on jetting?.......bikes got "opened a/box",staintune big bore headers/muffler,and vortex ignition(dual curve,just a advanced setting and a low grade fuel setting)sea level over here.Can this carb be run with standard intake boots etc?,better/worse fuel economy?Thanks gentlemen...

L Rider

Joined : 2009-07-06

Posts : 40
Location : australia
XR650R Year : 00 0

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Re: tm40 carby on xr

Post  Thumpmeister on Sun Nov 01, 2009 5:02 pm

Old post, I know, but no one answered this guy, so hopefully I can shed a little light in his direction...
Go on Borynack's site, he has a jetting guide for the TM 40 based on what you have done on your bike. The chart you're looking for is at the bottom of the page.
XRR Jockey

Joined : 2008-12-09

Posts : 56
Location : Washington
XR650R Year : 2000

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Stuff this technical

Post  Bump on Sun Nov 01, 2009 6:47 pm


For stuff a little obscure, or pretty technical, you'll be better off on the yahoo group. There's some deep knowledge there with about 5000 members. And it functions different than more modern sites like this. An email is sent out to everyone based on their preferences. That's about the site's only advantage, IMHO.

Good luck. let us know how it performs when done.

XRR Monger

Joined : 2009-01-28

Posts : 1144
Location : Canyon Lake, So Cal
XR650R Year : 2002

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Re: tm40 carby on xr

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