Question about Mikuni Motorcycles

1 Answer

How to set the idle on a 222cc mikuni - Mikuni Motorcycles

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    One Above All:

    The expert with highest point at the last day of the past 12 weeks.

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.

  • Mikuni Master
  • 48,573 Answers


Btw, I’m available to help over the phone in case u need at

Posted on Apr 25, 2017


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Mikuni bs32ss doing a carb sync. Where to attach vacuum hose and which screw to adjust. Even the "manual" doesn't identify which screw or where to attach hose. Pictures would be nice. Thanks

Each carb has a small vacuum port on the side above the float bowl, you adjust the idle stop screw to set the tune and sync the carbs. Leave the air fuel mixture screws alone.

Apr 12, 2017 | Mikuni Motorcycles

1 Answer

What is the meaning of A/F regarding a Mikuni VM24 TNX carburetor

Hi, Marlon A/F stands for air/fuel mixture that is adjustable in the idle/pilot circuit for more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at Good luck and have a nice day.
Carburetor Know How and What and Tuning
Mikuni Carburetor Tuning for Vin
Mikuni carburetor operation and tuning
How to tune Mikuni carburetor pilot circuit

Btw, I’m available to help over the phone in case u need at

Nov 23, 2016 | Mikuni CARB VM34 SNOW VM34-389

1 Answer

I need to know the proper tuning of ucal mikuni carburetor with mixture adjusting screw on bottom of cabr (beneath float bowl), an idle adjust screw and pilot screw (hopefully pilot fuel screw since s

Why did you need to clean the carb? Routine servicing of the aircleaner would keep the carb clean for life. The pilot screw should be 1.5 turns out approx. with a small adjustment either way. Idle speed is set to a smooth low idle.If this doesn't fix it have you got something in the carb not replaced correctly? The float needle/float assy? How did you clean it? Have you introduced fluff/dirt into the carb and did you blow it clean with an airline?

Oct 09, 2014 | Motorcycles

1 Answer

Mikuni flat slide carburator tm38

ADD AIR FILTER needs more restrictive intake. Getting a gulp of too much air.

Jan 17, 2014 | Motorcycles

1 Answer

Trying to find idle adjustment on mikuni carb on 2001 ttr90 . It has low idle speed and I thought I could turn in an adjustment screw but where is it? Do I have to lengthen the throttle cable to pull the...

Hi, Anonymous for this scenario you will need your service/owners/ manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $ you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Trying to find idle adjustment on mikuni carb on 2001 ttr90 Google Search
TTR90 Carb Fix
YAMAHA TTR90 Owner Service Manual
OEM parts for Yamaha
YAMAHA TT R90 Owner Manual

Btw, I’m available to help over the phone in case u need at

Sep 21, 2013 | 2004 Yamaha TT-R 125 E

1 Answer

Adjustable knob on the Mikuni BS26 Carburettor. Please advise what it is for.

there are a few adj. screws on carburetors air/fuel, sync, idle,
this is a link to the manual it'll tell you everything you need to know. If you need anything else feel free to contact me

Feb 12, 2011 | BMW R 80 Motorcycles

1 Answer

I am trying to tune the carb on a Yamaha 80 raptor. I do not know which screw does what. By the way, this is NOT a G5. It is a small 4 wheeler The carb is a Mikuni G499? or a 5TH1.00? HELP Please !!!!!!

On most Mikuni carbs The screw that lines up with the middle of the slide and often has a spring on its shaft to stop it moving is the idle screw, it merely lifts the slide to increase engine revs, the same as opening the throttle and will not change mixture or jetting.

The smaller screw often on an angle, or from underneath is the mixture or air screw. this will affect mixture mainly at idle, low revs, starting.
these are usually set by screwing it all the way in and counting the turns, then back it out the same number of turns to get a start point, usually about 2 turns out from the fully in position. it should only need adjusting about a quarter of a turn either way.

with the bike idling as you turn it in, the engine will start to bog down (rich) as you screw it out the engine should smooth out until it has an uneven idle and change in idle speed up and down(lean) and pick the smoothest idle in the middle, but this should be less than 1 turn from rich to lean

Oct 15, 2010 | Yamaha G5 Motorcycles

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

20 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mikuni Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4988 Answers

Andrew Taylor
Andrew Taylor

Level 3 Expert

20929 Answers

Paul Davies

Level 1 Expert

6 Answers

Are you a Mikuni Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides