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17th November 2020
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Senior Chief Master Mechanic 2nd Class
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Join Date: Apr 2019
Location: 17130 Spain
Posts: 1,551 Sportster/Buell Model: XL 883 ₪ 1275 Sportster/Buell Year: 2006 Other Motorcycle Model: Big Dog K9 Other Motorcycle Year: 2006
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Bryan,
Does this bracket comes with its own cable, etc? I mean... it does looks shorter than the original...
I did follow the instruction from Mikuni.... but I cannot find a way to make sure its closing properly... Maybe its just me being paranoid...
Is there a way (noise ?) to find out?
Paul,
Keep us posted on your results, please.
My, AFR tuning, screw does nothing when turning anti-clock wise, I can go way out and nothing.... clock-wise (richer) stumbles at 3/4 out from seated. I left it at 2.5 turns out at the moment.
It was running Pig-Rich but I did assume it was because of the Accelerator Pump was pumping fuel all the way to WOT.... the screw #2 mentioned above (Post #204) was waaaayyyy open, it was doing nothing.... now I left it closing the pump at half throttle.
Will go for a ride this morning and will report back.
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17th November 2020
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XL FORUM TEAM MEMBER
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Join Date: Jan 2015
Posts: 393 Sportster/Buell Model: 1275 Sportster Sportster/Buell Year: 2001 Other Motorcycle Model: Dyna Wide Glide Other Motorcycle Year: 1998
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I have everything switched . It's a Mikuni cable and nut also enricher valve . As far as adjusting it I did it on the bench Per the manual . I do have a bit of free play but not that much. I know it closes all the way because of the spring seems longer than it should be .
Sent from my iPhone using Tapatalk
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Don't cry because your CVO cant keep up with my sportster after all its a girls bike remember   Blue collar knuckle buster.
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17th November 2020
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Dazed & Confused
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Join Date: Feb 2019
Location: Never Never Land
Posts: 1,856 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2017 Other Motorcycle Model: BMW R9T Other Motorcycle Year: 2015
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Quote:
Originally Posted by Highly-Dangerous
My, AFR tuning, screw does nothing when turning anti-clock wise, I can go way out and nothing.... clock-wise (richer) stumbles at 3/4 out from seated. I left it at 2.5 turns out at the moment.
It was running Pig-Rich but I did assume it was because of the Accelerator Pump was pumping fuel all the way to WOT.... the screw #2 mentioned above (Post #204) was waaaayyyy open, it was doing nothing.... now I left it closing the pump at half throttle.
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Best thing you can do during the tuning process is adjust the accelerator pump so it does little or nothing. It mostly confuses the tuning process and is the LAST thing you adjust after EVERYTHING else is right.
What size pilot jet are you running? You should be able to run the IMS out and make it idle worse. On Mikunis where the IMS controls air, best off idle transition is usually when "best idle" is with the IMS out 1 to 1 1/2 turns. The "choke" plunger does need to be seated so it's not mucking up the process.
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2017 XL1200C in SE Wisconsin, USA
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17th November 2020
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XL FORUM TEAM MEMBER
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Join Date: Nov 2004
Location: jupiter fl
Posts: 2,820 Sportster/Buell Model: 1200C Sportster/Buell Year: 04
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I have a 3/16" play with no ill effects.
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04/07 1275 BFH heads .590 Cat 4 cams S&S 1.725 rockers S&S premium lifters BDL+15% clutch TC88A HSR-45 S&S 3" ac LSR 2-1
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17th November 2020
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Senior Chief Master Mechanic 2nd Class
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Join Date: Apr 2019
Location: 17130 Spain
Posts: 1,551 Sportster/Buell Model: XL 883 ₪ 1275 Sportster/Buell Year: 2006 Other Motorcycle Model: Big Dog K9 Other Motorcycle Year: 2006
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Quote:
Originally Posted by Tomcatt
Best thing you can do during the tuning process is adjust the accelerator pump so it does little or nothing. It mostly confuses the tuning process and is the LAST thing you adjust after EVERYTHING else is right.
What size pilot jet are you running? You should be able to run the IMS out and make it idle worse. On Mikunis where the IMS controls air, best off idle transition is usually when "best idle" is with the IMS out 1 to 1 1/2 turns. The "choke" plunger does need to be seated so it's not mucking up the process.
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25 and 165 Main. Pump Nozzle is a 60.
Plugs look very clean white on the porcelain.... but dark/oily/carbon on the outside |
18th November 2020
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XL FORUM TEAM MEMBER
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Join Date: Jan 2009
Location: In a swamp/Michigan
Posts: 14,926 Sportster/Buell Model: XL1460C Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL1200R Sportster/Buell Year #2: 2006 Other Motorcycle Model: XL1200R Other Motorcycle Year: 2004
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If the choke plunger doesn’t fully seat you will get the “pig rich” issue.
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25th November 2020
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Senior Chief Master Mechanic 2nd Class
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Join Date: Apr 2019
Location: 17130 Spain
Posts: 1,551 Sportster/Buell Model: XL 883 ₪ 1275 Sportster/Buell Year: 2006 Other Motorcycle Model: Big Dog K9 Other Motorcycle Year: 2006
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Update:
All good now. Choke is working properly.
For those of you who r running Miks, the Accel Pump Screw #2 (as mentioned above) must be in the correct position.. Almost flat to the Carb´s body., very little travel needed or you will be running PIG-RICH.
The Carb needs to run on its jets, not on a stream of fuel.....
If anyone have questions, please, do not hesitate to contact me.... It´s not easy to write it here just like that.... (or maybe yes, dunno).
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25th November 2020
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Dazed & Confused
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Join Date: Feb 2019
Location: Never Never Land
Posts: 1,856 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2017 Other Motorcycle Model: BMW R9T Other Motorcycle Year: 2015
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Quote:
Originally Posted by Highly-Dangerous
Update:
For those of you who r running Miks, the Accel Pump Screw #2 (as mentioned above) must be in the correct position.. Almost flat to the Carb´s body., very little travel needed or you will be running PIG-RICH.
The Carb needs to run on its jets, not on a stream of fuel.....
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+1 During the tuning process it's best to have the accelerator pump doing nothing. Once you get the pilot jet, IMS, needle jet, needle and needle clip position sorted out you can adjust the accelerator pump if there's a need. A 42 Mikuni will probably run just fine on a 1200 with little or no accelerator pump shot. A 45 or 48 will probably want more. |
1st December 2020
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Senior Chief Master Mechanic 2nd Class
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Join Date: Apr 2019
Location: 17130 Spain
Posts: 1,551 Sportster/Buell Model: XL 883 ₪ 1275 Sportster/Buell Year: 2006 Other Motorcycle Model: Big Dog K9 Other Motorcycle Year: 2006
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Yup! it is running beautifully now. I am Happy!!!
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