Question about 1988 Suzuki GSX 600 F (Katana)

1 Answer

Idle speed problems

Got this bike in bits when rebuilding carbs found someone had been in at mixture screws dont know the settings for these and when i was trying to sync the carbs the idle was very eratic near impos to adjust new plugs and filter fited. was trying to sort a small misfire that happen sometimes

Posted by on

  • 1 more comment 
  • Anonymous Mar 12, 2014

    used bike will not increase speed past 45 to 50 mph. Has new plugs and fuel filter. Was sold in the Dallas area and moved to Albuquerque, a 5500 foot change in altitude. Could this be a jet adjust ment in the carbs?

  • Anonymous Mar 19, 2014

    What is the factory setting for the 2001 intruder idle mixture screw

  • Anonymous Mar 19, 2014

    What is the factory setting for the idle mixture screw?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Suzuki Master
  • 767 Answers

Hi Walker14,

You have to sync thecarbs and also you will have to reset the air-fuel mixture screws.
One of the carburators should be factory adjusted, I dont wn a kawasaki but I own a YAMAHA SECA XJ750R and thro it I am sharing my experince.
Once you have located the factory preadjusted carburator you can thn set the others to its specs. I use the feeler gauge to do for my bikes carburators and it works fine.
With regards to the mixture screw..... get the all in tightened but slowly aas to not damage the pin end of it!.
Start the bike and get it to normal running temp and thn set the screws 2 and half turns may need to set your idling speed before you begin this setting of the mixture screws, you prolly will hveto go higher on revs or vicecersa ....onc eyou are at the mixture screws and adjusting them , you will surely note the differenc ein sound of he bike an its idling ..
Hope this will help.


Posted on Feb 02, 2009


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

a 6ya Mechanic can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

My husband touched the carb settings on my sons new 2007 ttr 50. I read the manual to try and find the number of turns to return to stock settings. Can you please please help!

The carb mixture screw may add air or fuel, depending on the model. If the bike will idle it can be adjusted without knowing the factory setting. What you want is the highest idle that can be achieved using just the mixture screw, not the idle setting screw. Start the motor, then slowly turn the mixture screw in. If the idle speed increases, continue in that direction. If it slows and becomes rough, turn the screw back out until you reach the highest idle speed. That will the correct setting for the bike at your altitude.

Sep 23, 2014 | Motorcycles

2 Answers

Why will my 1985 yamaha xj700 maxim fire but wont stay running or idle

Two main reasons; 1. There is an air leak in the intake manifold--the rubber thing on the engine side of the carbs that mounts the carbs. Or, 2, the jets in the carb are clogged.

To decide which to fix, open a propane torch and let the gas flow but dont light it. While running your bike as slowly as you can, let the gas from the unlit torch pour over the intake manifold. If the engine speeds up, you have a leak. If this doesn't affect the speed, the carb jets are clogged.

To clean them, take the carbs out, remove the cups from the bottoms, called the float bowls--just take one bowl off at a time.

You will then see two small towers with brass plugs in them, called jets. Take these brass plugs out and blow their small holes out with carb cleaner from Walmart. Make sure you can see light through each one of them them. Put things back together and go for a test drive.

Aug 29, 2014 | 1985 Yamaha XJ 700 X Maxim

1 Answer

Hi I am rebuilding a 1979 suzuki enduro I took the carb apart and cleaned it ..It idles great but when i get on the gas it Bogs down and quits any info or parts catalog or manual would be great...I dont...

check the air box and filter for obstructions.

The mixture screw should be fully screwed in gently and then undone about 1 1/4 to 1 1/2 turns.
The idle screw is only in operation during idle, then slide then comes into play and then on fuller throttle settings, the needle and main jet take over.

If rebuilding it is imperative to have a good workshop manual/ some are available online.


1979 Suzuki TS(cc? 175, 250, 350, 500) Enduro workshop manual.

Carb specs below for TS185

Original Suzuki TS TC TM Forum

May 26, 2017 | Suzuki 51i Enduro Motorcycles

1 Answer

2004 250R Idles at 4 to 5K with idle adjustment turned all the way out. Wanders a lot and will go down and then kill sometimes. Have idle mixture screws 2.5 turns open. Is this close to right? Also how do...

The high uneven idle sounds like its s ucking air somewhere.
Try not to touch the sync screw,until you have the guages, (if its too late to say this) then get something like 6mm drill bits and sit them under the the carb butterflys, and check the sync screws are just touching the relevant levers so all carbs open equally.

Aug 11, 2011 | kawasaki Ninja 250R Motorcycles

1 Answer

Hey i have a 1992 yamaha xv1100 virago i am doing a carb rebuild an am stuck on the PILOT SCREW settings my repair manual says preset an does not give the setting my bike is not on your list

It usally pays to count the turns in before you remove them, but you probably know that by now.
Try them at around 2 turns out, and see how smooth the idle is. and try them a quarter of a turn in and out and listen to the difference. if you get a couple of vacumn gauges, they can help and then set the syncronization between the two carbs.
If you do try this and it may take a while, get an industrial fan to cool the engine as you do it, cause as the engine warms the mixture changes.
The pilot screws and carb sync have their biggest effect at idle.
You can also adjust the pilot mixture one cylnder at a time, by removing a plug lead, put another plug in the cap and short it to the frame, so it wont damage the coil,
and adjust the mixture as if its a 550 single then do the other cylnder

Apr 03, 2011 | Yamaha XV 535 Virago DX Motorcycles

1 Answer

Hey just wona know where the air mixture screw on my carby should b set at coz i jus bought the bike n found the screw is wwound all the way in wot should i do

Most air mixture screws you never have to mess with. In your case, someone else decided to do this for you. First, if your bike is running rough, make sure you do a THOROUGH cleaning of the carbs so that when you DO set the air mixture screw, it will do its job correctly. The normal procedure for the air screw is to start with the screw a few turns out (counting exactly where you are starting from) For this particular bike, lets say 2 full revolutions. Now, with the bike running, (it should be able to run as long as the carbs are clean) screw the mixture screw out however many turns it takes until the motor stumbles a little. This can be hard to hear sometimes, so you may have to repeat this step. When it stumbles, record how many turns it took. So, for our example, 2 turns, plus you turned it out another 2 turns, making it "stumble" at 4 turns out. Now, reset the mixture screw to 2 turns out. Do the opposite and screw in now, making note of when it stumbles again. lets say it stumbled at 1 turn in. Now we know that the best possible solution is to put the air screw between 1 turn and 4 turns out, which means you should set it at 2.5 turns out (which is half way between 1 and 4 turns out). After all of that is done, you will want to double check the synchronization of your carbs to make sure they are all within spec of eachother. I hope this helps.


Nov 16, 2010 | Suzuki RM 250 Motorcycles

1 Answer

1995 FLSTF 80CI Carburator bike not passing emissions

If you're talking about simply adjusting the idle mixture screw, you need to turn the screw inwards to lean it out. But, if you can get to the idle mixture screw, your carb has been modified as this screw has a "anti-tamper" plug covering the screw. The mixture screw is on the back side of the float bowl facing upwards.

More than likely, it sounds as if someone has rejetted the carb. That year model CV carb came with a a #42 slow jet in the carb. The modification to make them run better was to go to a #45 slow jet. This was in the original Keihen 40mm CV type carb. You can try to adjust the mixture screw and see if that allows you to pass. If it doesn't, repost and let us know. Maybe we can help you rejet your carb. Good Luck!

Jan 26, 2010 | Harley Davidson FLSTF - FLSTFI Fat Boy...

1 Answer

How to set up a carb with 31840 rebuild kit

what exactly do you want to know? Carb. mixture settings are as follows: L-head engines

Tecumseh carbs.........mainscrew 1 3/4 turns idle screw 1 1/4 turns
Walboro carbs........... mainscrew 1 1/2 turns idle screw 1 1/4 turns

L-head and OHV heavy duty engines 1 turns for both

Dec 21, 2009 | Toro Garden

1 Answer

1977 750gs carb sync

carb sync is done using only the carb hard stop adjustment u don't touch the air fuel mixture screw, had this exact same bike had the serive manual am dead sure on this

Aug 04, 2009 | 1977 Suzuki GS 750

Not finding what you are looking for?
1988 Suzuki GSX 600 F (Katana) Logo

734 people viewed this question

Ask a Question

Usually answered in minutes!

Top Suzuki Experts


Level 3 Expert

77499 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers


Level 2 Expert

83 Answers

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

Answer questions

Manuals & User Guides