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Old 02-02-2013, 08:37 AM   #15916
AirCommando
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Location: Tucson, AZ
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I just purchased a used MIKUNI TM40 and was hoping to get some inmate info on initial settings.

My XRR is uncorked with factory exhausted. Factory air cover. Here in Tucson my play area is 2000'-6000' and 80-100 degrees.

Looking for MJ #, PJ # and needle positions.

Thank you.
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Old 02-02-2013, 09:04 AM   #15917
mdlak
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XRR fork disassembly

Does anyone have some tips/experience on disassembling their forks? I'm having trouble loosening the compression stack/center bolt from the fork leg. Made the 27mm tool for the fork damper holder but the it just won't break loose.
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Old 02-02-2013, 09:56 AM   #15918
Kiko
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Quote:
Originally Posted by AirCommando View Post
I just purchased a used MIKUNI TM40 and was hoping to get some inmate info on initial settings.

My XRR is uncorked with factory exhausted. Factory air cover. Here in Tucson my play area is 2000'-6000' and 80-100 degrees.

Looking for MJ #, PJ # and needle positions.

Thank you.
1.2 air jet, 25 pj, 140 mj, and clip 4 down (with washer under clip) on the needle works for me. A lot will depend though on how the exhaust tip was modified when the bike was uncorked, You'll be lucky if you get it tuned right quick, mine is real finicky. You may need to tweak the AP adjustment with a small gap in case you get a bog when you whack the throttle. Good luck.
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Old 02-02-2013, 11:06 AM   #15919
KYLEISCOOL
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Quote:
Originally Posted by bamfslap View Post
Hell yeah! Nice to see someone else jump the pig. Though I haven't done any fancy tricks yet (unless you count and accidental super man).
As long as you looked good doing it Thanks AJ.
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Old 02-02-2013, 12:38 PM   #15920
mdlak
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Kyle IS cool!

Great pic!
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Old 02-03-2013, 08:31 AM   #15921
AirCommando
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Inmates, here is the gas lines that came with my used TM40. Which goes to the tank and what's is the other one for?

Thank you.




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Old 02-03-2013, 08:41 AM   #15922
larryboy
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Originally Posted by AirCommando View Post
Inmates, here is the gas lines that came with my used TM40. Which goes to the tank and what's is the other one for?

Thank you.




That is a T setup for dual petcocks like on the big Acerbis tank.
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Old 02-03-2013, 08:56 AM   #15923
AirCommando
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Thanks for the info. Any recommendations on where to attach the choke cable?
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Old 02-03-2013, 11:57 AM   #15924
larryboy
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Originally Posted by AirCommando View Post
Thanks for the info. Any recommendations on where to attach the choke cable?

Some place it will reach and you can reach with the tank on. Make sure it doesn't pull on the 90*, fragile plastic that breaks easily.
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Old 02-03-2013, 03:49 PM   #15925
pwrtrippin
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TM40 cable choke

Right about here, it takes a little tweak to the bracket but ends up under frame line so its safe from boots, branches etc. Also can turn it off with the side of your boot.

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Old 02-03-2013, 03:52 PM   #15926
dirtyoffroad
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Quote:
Originally Posted by AirCommando View Post
I just purchased a used MIKUNI TM40 and was hoping to get some inmate info on initial settings.

My XRR is uncorked with factory exhausted. Factory air cover. Here in Tucson my play area is 2000'-6000' and 80-100 degrees.

Looking for MJ #, PJ # and needle positions.

Thank you.
Same question but maybe from 0-1000' elevation?
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Old 02-03-2013, 05:32 PM   #15927
HeadShrinker
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Just picked up this 03 and shredded my plate the first time out...

Where has she been all my life???
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Old 02-03-2013, 05:49 PM   #15928
jm-2008
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[QUOTE=AirCommando;20633361]I just purchased a used MIKUNI TM40 and was hoping to get some inmate info on initial settings.

My XRR is uncorked with factory exhausted. Factory air cover. Here in Tucson my play area is 2000'-6000' and 80-100 degrees.

Looking for MJ #, PJ # and needle positions.

Thank you


This works well for mine -
Pilot = 25
Pilot Air Jet = 1.1
Jet Needle = 9DJ1 third groove down from the top (plastic washer underneath)
Needle Jet = Y4
Main = 140

Mainly ride around 2-4000 ft altitude
Side cover stock
Exhaust stock - uncorked (think the US versions you need to take out the centre of the cap with a hole saw)
Stock ignition

The settings above will get you in the ball park and from there its little steps at a time.

Good luck.
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Old 02-03-2013, 05:53 PM   #15929
CharlieXR4
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I just picked one up myself

 photo 2013-02-03_18-09-54_991_zps69f1f47e.jpg
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Old 02-04-2013, 07:28 PM   #15930
AirCommando
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MIKUNI TM 40 idling problems.

Here is my situation:

I am at 2000'. I am running a 22.5 PJ and a 1.2 AJ. The pilot screw is set at three turns open per the manual as a starting place for tuning.

The bike starts fine on the first kick and idles with the choke on. It dies shortly after the choke is turned off.
With the choke off the bike will start momentarily and then die. If I catch it running with the throttle it will rev and is rideable. Coming back down to idle it dies.

I am wondering if it could be the float level, the manual does mention a too high of a float level making idle tuning impossible.


Second question, what is a good initial place to set the idle adjuster. Once it is idling of course.

Any thoughts are appreciated.
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