Question about 1992 Suzuki GSX 600 F (Katana)

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My 92 katana won't start, it has spark, holds compression, and is getting fuel. It turns over but the only thing getting hot is the starter. Any input or suggestions is appreciated.

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  • Kryo_Strife Aug 05, 2010

    After some trying to start it does the exhaust headers start to produce heat? If not you might not getting actual ignition and combustion inside the cylinders.

  • mikeg689 Aug 05, 2010

    the pipes are cold, i have a spark when i test it, but it's not fireing.

  • Kryo_Strife Aug 05, 2010

    When you pulled out the spark plugs did you notice anything unusual about them? Any gas still on them, oil fouled, any carbon fouling? How did you check if it's getting fuel? and did you use an actual compression tester to check the compression (If so what was the readings across all 4 cylinders)?

  • mikeg689 Aug 06, 2010

    I used a compression gauge, it rose 30 ?lbs? every crank and i cranked 3 times. Same for all 4 and they held at 90lbs. i had carb issues so i took them off and cleaned them out because two of the plugs had carbon build up and two were wet. i don't know if it's getting gas to the plug but it's getting gas through the carbs because they're flooding out (i took the air box off). So my next move is replaceing the plugs with new and checking the coils to make sure they're getting the battery voltage, if it's not after that I'm going to assume it's the ignitor. if it is i'd think it's the coils. I have spark but someone said weak spark could cause this problem.

  • Kryo_Strife Aug 07, 2010

    now if bikersteves solution didn't work then I have some information for you. 90 lbs. on a compression test is below normal. normal should be around 120-150 lbs after 3 turns of the crank. You might have a carburetor sync problem if two plugs where carbon fouled an two where wet.

  • Kryo_Strife Aug 07, 2010

    I doubt it's the kill switch if you are getting spark at the plugs. Weak spark could cause a problem but it seems to me that you have 2 cylinders flooding out and 2 cylinders running rich. When was the last time you had the carbs synced and the floats adjusted? have you recently put in a new air filter suck as k&n, BMC, anything that flows more than your stock paper filter? also has the bike been dropped at any point recently?

  • mikeg689 Aug 07, 2010

    i cleaned the carbs, it has a k

  • Kryo_Strife Aug 08, 2010

    When you cleaned the carbs did you adjust the floats in any way whether on purpose or accident? Syncing the carburetors has to be done with a special syncing tool. When you sync the carburetors it makes sure that the carbs are all running the same amount of fuel and air into your engine per cylinder. If they are not synced and/or the floats are too high it will flood out your motor and cause it not to start.



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Check the wires to kill switch orange and orange and white my switch had packed in i put these 2 wires together bingo it was away just why do these things happen when your about 20 miles from home and the wires are located under the tank so was a pain to do at the side of the road with a 10mm spanner to remove tank (full of fuel) and a swiss army knife to strip the wires nightmare lol

Posted on Aug 06, 2010


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