General Harley Davidson Chat Forum to discuss general Harley Davidson issues, topics, and experiences.
Sponsored by:
Sponsored by:

Mikuni Carb

Thread Tools
 
Search this Thread
 
  #1  
Old 09-04-2013, 05:28 PM
FLoTR's Avatar
FLoTR
FLoTR is offline
Road Master
Thread Starter
Join Date: Oct 2008
Location: North Carolina
Posts: 1,086
Received 0 Likes on 0 Posts
Default Mikuni Carb

Got an 03 Super Glide with a 95in. kit, cams and Mikuni carb.
Can I get tuning tips and thoughts in general on this carb? All comments appreciated.
 
  #2  
Old 09-04-2013, 06:27 PM
heybaylor's Avatar
heybaylor
heybaylor is offline
Stellar HDF Member
Join Date: Oct 2010
Location: east texas
Posts: 2,540
Received 127 Likes on 72 Posts
Default

mikuni is a good carb, but no better than the original kehien..
slow jet =zero to 1/4 opening
cutaway =response from 1/4 to 1/3
needle =1/4 to 3/4
main jet 3/4 to wide open
what do you want to know??
 
  #3  
Old 09-04-2013, 07:23 PM
Uncle G.'s Avatar
Uncle G.
Uncle G. is offline
Seasoned HDF Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 9,187
Received 3,703 Likes on 1,988 Posts
Default

You can download the tuning manual from the Mikuni website. It will tell you all you need to know. I've been running one since '02 on my bike. It works well, but IMO is jetted a bit rich from the factory for a stock motor. If you're motor isn't stock, that may not apply.

Despite Mikuni's claims to the contrary, I've never been able to match the fuel economy of the stock Keihin. Then again, back when I ran the Keihin, gas was about $1.50/gallon, and it was real gas, not the E10 crap we have to use today.
 
  #4  
Old 09-04-2013, 08:55 PM
magnum629c's Avatar
magnum629c
magnum629c is offline
Outstanding HDF Member
Join Date: Jun 2008
Location: redbank new Jersey
Posts: 2,374
Likes: 0
Received 5 Likes on 5 Posts
Default

I got one and I think there the cat meow.... I got 42mpg 45hwy...go with a 22.5 pilot jet or a 20 if that's all u have.. 165 main.. And a 50 a/c pump.... Set the screw at 2full turns and leave the needle in stock spot.. Text me if u want 908-461-1895
 
  #5  
Old 09-04-2013, 09:14 PM
hoethree's Avatar
hoethree
hoethree is offline
Elite HDF Member
Join Date: Apr 2009
Location: Al Bu Ker Key, New Mexico
Posts: 3,780
Likes: 0
Received 68 Likes on 20 Posts
Default

Replacing the stock carb on my 1999 FXR2 with the Mikuni was one of the best upgrades I ever made to that bike. Throttle reponse is WAY better than the stock model. Sorry, havent got a clue on how to tune it. I ride, someone else wrenches.
 
  #6  
Old 09-04-2013, 09:54 PM
Uncle G.'s Avatar
Uncle G.
Uncle G. is offline
Seasoned HDF Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 9,187
Received 3,703 Likes on 1,988 Posts
Default

Originally Posted by magnum629c
I got one and I think there the cat meow.... I got 42mpg 45hwy...go with a 22.5 pilot jet or a 20 if that's all u have.. 165 main.. And a 50 a/c pump.... Set the screw at 2full turns and leave the needle in stock spot.. Text me if u want 908-461-1895
That's almost exactly how I have mine jetted, and I get just about the same mileage. With the Keihin I averaged around 50 MPG.
 
  #7  
Old 09-04-2013, 11:50 PM
magnum629c's Avatar
magnum629c
magnum629c is offline
Outstanding HDF Member
Join Date: Jun 2008
Location: redbank new Jersey
Posts: 2,374
Likes: 0
Received 5 Likes on 5 Posts
Default

What jets u have now? And Wheres the needle
 
  #8  
Old 09-05-2013, 05:47 AM
LoneBone's Avatar
LoneBone
LoneBone is offline
Seasoned HDF Member
Join Date: Aug 2012
Location: Whiskey Falls, Texas
Posts: 14,573
Received 24,383 Likes on 5,908 Posts
Default

Originally Posted by Uncle G.
You can download the tuning manual from the Mikuni website. It will tell you all you need to know.
This.

I actually ran twin mikuni's on a hardtail one time, and they have a pdf file you can print that will tell you everything there is to know...
 
  #9  
Old 09-05-2013, 08:50 AM
magnum629c's Avatar
magnum629c
magnum629c is offline
Outstanding HDF Member
Join Date: Jun 2008
Location: redbank new Jersey
Posts: 2,374
Likes: 0
Received 5 Likes on 5 Posts
Default

My buddy runs the same set up As I do just try a 20p 165 main 50a/c pump and u should be good to go.
 
  #10  
Old 09-05-2013, 06:36 PM
Uncle G.'s Avatar
Uncle G.
Uncle G. is offline
Seasoned HDF Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 9,187
Received 3,703 Likes on 1,988 Posts
Default

Originally Posted by magnum629c
What jets u have now? And Wheres the needle
Are you asking me or the OP? In my case, I'm running a #20 pilot/air screw 7/8 turn out (I had a 17.5, but it would cough in cold weather), #98 needle (center notch)/#165 main jet/#50 accelerator pump jet (pump rod set to "no" gap).

Motor is stock internally with Arlen Ness "Big Sucker" air cleaner and H-D by Kerker 2 into 1 exhaust and muffler.

Bike runs really well with this setup.
 

Last edited by Uncle G.; 09-05-2013 at 06:39 PM.


Quick Reply: Mikuni Carb



All times are GMT -5. The time now is 01:54 AM.