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Mikuni Tm 40 carb

XR650R Forum :: TECH SECTION :: Air To Fuel Mixes

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Mikuni Tm 40 carb

Post  JossaXr on Tue Feb 03, 2009 10:32 am

Just traded my original carb against a Mikuni Tm 40pumper carb nice
I will get it in 2 weeks.Do any one of you have one, and are you happy with it?

JossaXr
noob

Joined: 2008-11-14
Posts: 23
Location: Sweden
XR650R Year: no xr

http://www.ongrus.se

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Re: Mikuni Tm 40 carb

Post  ADVJake on Tue Feb 03, 2009 1:59 pm

Welcome to the Tm40 club
Badcooky and myself on this board have the carb. i'm still trying to dial it in.
So far the main jet is right, thats about it. pulls hard and stays that way on the main jet.

They are a bitch to tune, but i hope eventually it gets tuned right.
I might even give up and give it to a pro

ADVJake
noob

Joined: 2008-12-28
Posts: 36
Location: Sydney, Australia
XR650R Year: 2004

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Re: Mikuni Tm 40 carb

Post  badcooky on Tue Feb 03, 2009 2:35 pm

Welcome fella. BRP smile
I've got a TM40 on mine and i like it.
They are hard to find setup though.

badcooky
XRR Jockey

Joined: 2008-12-02
Posts: 73
Location: Australia
XR650R Year: 2005

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Re: Mikuni Tm 40 carb

Post  Thumpmeister on Wed Feb 04, 2009 7:08 pm

Doesn't BWB have a jetting guide for a TM40? I know he does for the stocker, and I'm pretty sure he has one for a TM as well. Check Borynack's site; he has a lot of good jetting info on it.

The chart is all the way at the very bottom...
http://borynack.com/XR650R/HorsePowerMods.htm

Thumpmeister
XRR Jockey

Joined: 2008-12-08
Posts: 54
Location: Washington
XR650R Year: 2000

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