Question about 1998 Suzuki GSX-R 600

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I tried adjusting the air mix ratio screw but it didnt seem to do much with my problem . i put the bike up on my bike jack to see what rpm it starts to cut out and it starts around 6000

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  • Rob Stephenson
    Rob Stephenson May 11, 2010

    What kind of air filter, what kind of pipes? Full exhaust or slip on. What kind of jet kit


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Thats in the mid range of the rpm's so I got to say that you have something in the carbs that are making it do that. You need to take the carbs off and disassemble them and clean them real good.

Posted on Sep 28, 2009

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My yz250 uses way to much fuel and spits oil even with a 50/50 ratio. I dont know if i need to change the jetting or adjust the air screw.

Probably both settings need attention. But you could have a sticking carb float too. Here is a pretty good procedure for setting air to fuel mix:

If performance still lacks after adjusting dismantle and inspect carb.

Dec 21, 2012 | Motorcycles

1 Answer

How to get to air fuel mixture screws for adjustment with carb on engine, no room to get flex screw driver to the screws ! This is on a 1984 Ford E-150 van with a 302.

Do you have a Holly on that ? if not then, you have to pull the carb. apart to adjust the fuel/air mix, are you talking about the idle air mix screws, this only adjust the idle mix, not the fuel ratio when running above idle, I have seen slots (screw driver) oval, hex screws, your going to have to see which one you have, take the air cleaner off and reach it from the front of the van.

Jul 28, 2011 | Ford E-150 Cars & Trucks

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Hard to start, when i get it started it fine shut it off try to start it hard to start

General advice aplicable for all gas powered chain saws;
Clean air filter regularly.
-Adjust spark plug gap (very important). A faulty gap will either cause poor spark or a overloaded and damaged spark plug coil.
-Use correct good quality spark plug
-Use correct oil/fuel mix ratio and correct oil.
-Do not use old premixed fuel if you can avoid it.

Carburator adjustment;
-idle speed setting screw should be set so that the saw idles well, without engaging the chain. If you normally have to press the gas lever to be able to start it coul indicate a to low seting. Clockwise will increase idle speed. This screw is found near the carburator and is slightly larger the the two adjusment screws.
- fuel-air mixture screws can be set to standard factory setting as a start. Normally there are 2 screws labeled L and H, for Hi and Low rpm band adjustments. Factory setting are usually 3/4 turn out(anti clockwise) from fully closed setting for both (clockwise to closed position).
Experiment with adjustments by 1/8 increments at the time. Anti clockwise turning will increase fuel to air ratio and opposite. Warm weather will require a slightly leaner mix and cold weather will reqire a slightly richer mix(more fuel). Low rpm setting only serves the idling performance. The Hi rpm setting can be evaluated by removing the spark imediately after running at full load for a period. The spark plug should be dry, and be lightly brownish at the electrodes. White-ish color indicates low fuel to air mix, and this causes too high combustion temperature. A black colour indicates a too high fuel to air mix ratio, and it causes carbon build up on the plug.

If you still have starting problems, cylinder/piston compression is the next to check for. This is a more extensive job and should best be left to professionals, unless you are very skilled and have access to special tools required. Compression on modern saws are very delicately balance, so the slightest damage to either the rings, piston or cylinder can cause problems. Is is not alwas worth to replace the cylinder and piston kit, so compare prices and ask for advice at your dealer.

I hope this helps you.

Feb 25, 2011 | Poulan P3416 16Inch 34cc 2Cycle Gas...

2 Answers

My kia puts out blue white smoke when i start it in the morning and sometimes during the day when i start it. Its a Kia Soerento GLS 2.5 and it seems to be using oil through this problem.

burning oil
probably valve guides worn a little .when stopped a slight amount of oil gets on pistons and burns off when engine started hence the smoke

Feb 02, 2011 | Kia Sorento Cars & Trucks

1 Answer

The light Check engine is ON

Here are some very common causes for the engine light to com on.

1. Low fluids, make sure all of your fluid levels are where they should be, particularly the oil.

2. MAF, ( mass air flow ) sensor. This controls the fuel/air mix ratio to the engine.

3. Oxygen sensor, there are 2, ( front means before the catalytic converter, back means after the catalytic converter ) The front measure fuel/air mix, the back measure the emmisions from the fuel/air mix and tells the computer what adjustments need to be made to the fuel/air mix ratio.

I hope this helps you.

Feb 02, 2011 | 2007 Toyota Corolla

1 Answer

It will not run unless it is choked

sounds like it is running lean, increase your fuel air ratio and up the idle speed, both these adjustments can be made by jet screws wich are located on the carbuertor. You will need to consult your manual for the location of these. Also clean or replace your air cleaner and use fresh fuel with the recommonded 2-stroke mix. If you have no luck with the adjustments, increase your fuel/oil mix up richer.

Jan 21, 2011 | Poulan Garden

1 Answer

How do u know that your air screw is at the right setting?

Air screw adjustment is simply what runs best. All the things you listed do mean something when adjusting the bike, but only to someone with the equipment to properly test all functions of the bike while running. Just make sure your mix ratio is right, and if you have to adjust the air screw for the first time, always run it all of the way in first to find out what the factory set it at. Make sure you write that # down so if you do end up with a problem with your adjustments, you can go back to the original setting and try it again.

Jul 04, 2010 | 2002 Honda CR 250 R

1 Answer

Just rebuilt carbs, the bike starts but i have to hold my hand a little over the top of the air box,seal around carbs and air box seem tight what could it be? the bike says on top of the back fender no...

First is your choke open or closed when you startthe bike.Try adjusting your carb a/f mix as you are running rich (high fuel mix ratio). Good enough?

Apr 25, 2010 | 1992 Suzuki GS 500 E

1 Answer

Engine is flooding out and stalling at full throttle. Will only run with choke and seems to be idling high

a few tips to help you along..

Are you mixing oil and fuel together? if not you may be burning out the internals. Oil is added to help lubricate its internal moving parts of the engine.

When the choke is being used you are adding more fuel to air ratio, therefor when hot the air/fuel ratio is more balanced. if its cutting out you 'mix' is in need of feed adjustment to the combustion chamber...or

Your timing is a little off on the combustion to compression peak. Find the manual and see if there are adjustments.

Hope this helps


Nov 08, 2009 | Troy -Bilt String Trimmer/Blower...

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