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Help with Mods 2007 TTR125L

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I recently got a 2007 TTR125L, I am not new to bikes just this one.  I am looking to put a FMF Powercore 4 exhaust and get a JD Jet Kit.  Any information you guys can give me to help with this bike would be greatly appreciated.  I'm not sure if i need to open the air box up or what jets to run with this bike with the exhaust.  I have a 2012 DRZ400S with big bore kit, hot cams, fcr and mrd/ssw. I know what to do on it lol just not familiar with all the mods for this.  Thanks in advance.

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don't expect power gains, kinda like that DRZ you have.

 

open the airbox, run a 17.5 pilot and up the main to 110-115, adjust the fuel/air screw. 

 

if you want more, you can lighten the flywheel.  it will  make the motor more responsive.  after that it is big bore kit and cam. 

 

also get a BBR frame cradle for the bike

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