Question about 1990 Suzuki GSX 600 F (Katana)

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My bike was sitting for a while before i bought it i wanted to clean up the carbs but cant get them all the way off. i need to know how to remove the throttle and choke lines

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Choke cable - The cable nipple attaches to a bracket on the choke shaft, pull on metal end of the cable (where it goes onto the carbs) until the bracket has moved enough to disengage the nipple (hold bracket, release cable & disengage)
Throttle cables - Loosen the cable adjuster at the twist-grip all the way. Next loosen the 4 clamp screws holding the carbs on, disconnect the vacuum hoses, then remove carbs lift them up & disconnect the cable nipples from their holders
Et Voila !

Ride safe
Please mark this as very helpful (if it has been!!)

Posted on Apr 27, 2010

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If it has been sat for 2 years the fuel will have broken down so a full system flush with new clean fuel is a good 1st step.

If you have checked the carbs was there any sludge build up in the float chambers. If so I would dismantle and carefully clean with new fuel.

Make sure the tank is emptied and has not rusted. When you know you have clean new fuel. Try starting again.

When you get it running you need to use either a pair or easier 4 vacuum gauges to recalibrate the carbs.

This is fairly straightforward and a cheap set can be bought for as little as 8 pounds try Amazon. Obviously more expensive = better quality but if you are careful with them even a cheap set can be quite reliable.

Tip - Check each gauge against cylinder 1 for reading then you know if they are reading the same. Some are adjustable or just mark and set all to cylinder 1.

2.5 - 3.5 turns out sounds about right as a start point as you said.

Good luck

Mar 19, 2014 | 2009 kawasaki Ninja ZX10R

1 Answer


If the bike has been sitting for any period of time, maybe 6 months or more, the carbs and fuel system probably needs cleaning. Remove the carbs and have them cleaned or take the bike in for a complete fuel systems servicing. Carb cleaning can be rather detailed and should be left for the professionals unless one has experience.

Feb 20, 2013 | Motorcycles

1 Answer

I have a 1992 yamaha seca 600.Bike was parked for 2 years.I cleaned carbs 2x.Bike idles fine ,but when I give it a little throttle it dies..Please help...I bought this thing to go to work..Ive put a lot of...

Sounds like you still have a fuel delivery problem...How did you clean the carbs? The jets, pilots, floats and circuits in these carbs are hard to get throughly clean. I use a small steel guitar wire to clean with...A tiny pin hole in the diaphram, or dirty or stuck choke circuit will cause problems.The floats need to be set correctly... I recommend an ultrasonic carburetor cleaning for best results. Consider installing carb kits, they are not very expensive and come with new jets, float valve needles and gaskets...The bike has been sitting 2 years, did you service the fuel petcock and flush and clean the gas tank?
Also the carbs need to be "synched" after they installed...all matched and in time with each other...check for vacuum leaks around the carb boots and cylinder head...check all the vacuum lines for any cracks or leaks....Check all your electrical connectors for signs of corrision, if they are dirty, clean them, they should all be shiny. Check your grounds, the main ground from battery to frame is a problem area... where it grounds to frame usually rusts and cant be seen until you remove it...A clean electrical circuit will provide you with a hotter spark at the plugs and improve performance.

These are good bikes, just take your time and go over it. She will be back on the road again in no time. I hope this helps---Good luck with your bike!

Jul 16, 2011 | 1992 Yamaha XJ 600 Diversion S

1 Answer

My 2000 r1 wont start, light an everything come on,press the button an the starter is all i hear. from timt to time the bike trys to start, but it just doesnt. bought the bike from the previous owner who...

If the bike had been sitting for a while and it was running but wouldn't hold idle, you likely need to remove the carburetors and thoroughly clean them. To confirm it's the carburetors you can use a spray bottle to spray a little gas into the carb throats and try cranking. If the engine fires up, your problem is definitely in the carbs; more than likely gummed up. Remember not to use steel objects if you're cleaning the jets because you will enlarge them as a result.

Jun 25, 2011 | 2000 Yamaha YZF-R1

1 Answer

I bought my brother's 1987 Kawasaki Ninja 750R. He told me that he used to have to use booster cables to a car battery to start the bike for the first time in the spring. I've changed the spark plugs,...

Yes, drain the carbs. Also clean the air filter. Get a can of spray starting fluid to assist in getting the engine to start. Chances are the carbs are gummed up from sitting so long. You will probably end up removing the carbs for a thorough cleaning.

Apr 13, 2011 | kawasaki GPX 750 R Motorcycles

1 Answer

Just bought my first bike: 1995 Suzuki 600 Katana. Heres the problem: its been sitting for 7 years. Emptied gas tank, cleaned carb but is flooding. Put new battery in it and air filter is dirty but not...

When you cleaned the carb, did you get the needle valve put back in correctly? That is the small pointed valve that is actuated by the float. As gas flows into the carb it raises the float and the needle valve rises to shut off the gas flow. You should have put compressed air through the hole that the needle valve goes in. There is a removable jet that the needle valve tip goes into to shut off the gas. Remove a spark plug after trying to start it. If the plug is very wet it means the carb is flooding, and if it is dry it means the motor is getting no gas. If the plug is dry you can take off the air cleaner boot and pour a tablespoon of gas into the carb opening, then quickly try to start it. If it starts momentarily you know you just need to work on the carb. You also could remove a plug, put a teaspoon of gas into the cylinder, replace the plug and try to start it, to see if you get a pop or two. Put some Seafoam in the gas to help clean the carb. Make sure you use compressed air to clean out all the small passages in the carb. An owners manual would tell you exactly how to adjust the float level, but I think you can assume it's okay if you didn't do anything to it. Generally the gas shuts off when the float rises until it's about level. When you take off the bowl of the carb, before removing the carb from the bike, there should be gas in the bowl, but it shouldn't be overflowing.......somewhere around half full. Also, are you getting good compression? If that bike has a kick-starter it would be easy to determine if the compression is okay. If there is not much resistance to the kick-starter, or pushing the bike in high gear, the compression is bad and valves may be stuck or burned. Let me know how your project is going.

Jan 01, 2010 | 2005 Suzuki GSX 600 F (Katana)

2 Answers

Ttr90. starts easily and runs smoothly on choke. will not run smoothly or idle off choke. could this be bad gas? the bike has never been run hard, is stored inside and possibly suffers from infrequent use.

Remove and clean the carb. Sitting around can let the gas evaporate. This leaves a varnish residue in the carb. Remove the carb then remove the float bowl. Use a spray carb cleaner to spray into the jets and carb circuits. Remove the throttle screw and air screw and spray into the screw holes. The low speed idle circuit is the problem so concentrate on the air screw hole. Put both screws back where they came from and turn each until it LIGHTLY seats. Now back each screw one and one half turns. This is the factory setting. If the bike still does not want to idle, there is still some varnish or trash plugging up the idle circuit.

Sep 20, 2009 | Yamaha TT-R 125 Motorcycles

1 Answer

Setting carbs and setting valves

around that year , yamaha used small disks(no screw adjustment) for valve adjustments, so you measured the free play and bought new ones according to the set up is just a few 0.001" of an inch at tdc

Jun 21, 2009 | 1981 Yamaha XJ 650

1 Answer

Kawasaki zephyr 1100 not running right

The carbs have some very tiny passages that will easily be blocked by that varnish reside. You will need to pull the carbs and flush every jet drilling with an aerosol carb cleaner like gumout Remove the jet and blow the spray cleaner through, rinsing out ant gum build up. Clean all the passages you can find and the rest of the carb linkage and bod. Idle passages are vacuum drawn and if your manifold vacumm is low then the fuel cannot be sypyphoned. to keep the engine running. Vacuum leaks are common on bikes that sit because the hoses dry up and loose thier seal. Check all you hoses and replace any in doubt. Good luc And let me know, please.- Ned

Jun 20, 2009 | 1995 kawasaki Zephyr 1100

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