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Mikuni Jets for VM and CV carbs + Tuning Info (Read 3489 times)
Ruttly
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #15 - 09/27/21 at 14:56:38
 
You can find Lancer in the Marketplace
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Celeste
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #16 - 04/24/23 at 05:34:36
 
Unable to achieve idle. Is there a specific way to set the carb?
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #17 - 04/24/23 at 08:09:07
 
Celeste wrote on 04/24/23 at 05:34:36:
Unable to achieve idle. Is there a specific way to set the carb?



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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #18 - 04/24/23 at 09:24:20
 
Unable to respond due to website rules. (10 post minimum)

Letís go thru the works.

-Mikuni VM (round slide) 36mm Carb.
-Stock Air Filter
-Straight Pipe with open baffle end
-190 Main Jet
-Needle at 2nd from the top

17.5, 20, 22.5 pilot jets do not start idle at any nor successful sequencing combustion.

On choke, all produce backfire with blue flames.
Adjusting idle screw can produce lower bangs leaning out ( screwing out clockwise) or wet bangs when enrichment (screwing in counter clock wise) at 20 Pilot

On open idle, 0 throttle, pops occur. Sometimes a rare thud

No engine modifications
No TCI modification.
Spark presents blue, gapped at .35 inch

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Ruttly
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #19 - 04/25/23 at 11:15:53
 
Get a Sudco manual it will teach you how to jet your carb. VM36 is a great carb. Check the Tech section too.
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #20 - 10/18/23 at 21:27:34
 
I'm in need of an upgrade in jets to suit a 2017 s40 with a slip on Delkevic exhaust and stock airbox. Can anyone help me out?
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #21 - 10/19/23 at 08:48:26
 
What carb ?
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #22 - 03/27/24 at 18:38:21
 
Celeste wrote on 04/24/23 at 09:24:20:
Unable to respond due to website rules. (10 post minimum)

Letís go thru the works.

-Mikuni VM (round slide) 36mm Carb.
-Stock Air Filter
-Straight Pipe with open baffle end
-190 Main Jet
-Needle at 2nd from the top

17.5, 20, 22.5 pilot jets do not start idle at any nor successful sequencing combustion.

On choke, all produce backfire with blue flames.
Adjusting idle screw can produce lower bangs leaning out ( screwing out clockwise) or wet bangs when enrichment (screwing in counter clock wise) at 20 Pilot

On open idle, 0 throttle, pops occur. Sometimes a rare thud

No engine modifications
No TCI modification.
Spark presents blue, gapped at .35 inch



Is this a new carb and new problem?

Have you checked compression?

Is valve lash clearance within specs?

Make sure the carb is snug and tight in the intake manifold and the clamp is working.  The tiniest air leak there will cause running, idling, and tuning problems.  

Iím using a 27.5 pilot jet at 2.25 turns out on my VM36.  Stock air box and minimally baffled open turnout exhaust.  Easy starting, steady idle.
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Re: Mikuni Jets for VM and CV carbs + Tuning Info
Reply #23 - 03/27/24 at 18:44:21
 
Your intake manifold looks a little ďmunched upĒ at the carb by the worm gear. †

If you need, here's a link to an authentic Mikuni intake manifold (spigot).

https://www.ebay.com/itm/335262573582?_trkparms=amclksrc%3DITM%26aid%3D111000...


I like the band clamp on this one better.

https://www.ebay.com/itm/363451005451?_trkparms=amclksrc%3DITM%26aid%3D111000...
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intake_markup.jpeg
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