Question about 1990 Suzuki GSX-R 750 L
I've just bought a 84 gsx 750se not running, the previous owner used to bump start it as the battery was dead, so i bought a new battery, changed the oil&filter and put new plugs in,cleaned the tank out and put fresh fuel in, it turns over but will not fire up, so i sprayed ether engine starter through the air intake and it started and rev'd but would not stay running on fuel! could it be a fuel pipe problem? should the tap be on ON or PRI to start? help before i take it to the dealers please!
Hi and welcome to FixYa,
PRI setting allows fuel to flow from the tank to the carbs whether engine is running or not while ON requires that there is vacuum (engine running) for the fuel cut-off valve to allow fuel to flow (safety feature).
To determine if fuel is reaching the carbs, loosen the drain screw at the bottom of the carb's bowl. Fuel should leak out of the drain hose. For safety reasons, ensure no open flame and the fuel is collected in a suitable container. Another that could be tried is to turn off fuel from tank, temporarily remove the drain hoses from each of the carbs and spray the inside of the bowl through the drain hose nipple using carb cleaner. It would be easier to use the narrow tubelike nozzle that comes with the carb cleaner.
Good luck and thank you for using FixYa.
Posted on May 30, 2009
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Posted on Jan 02, 2017
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If the battery is dead after starting then you have a short in the starting system. If it only starts when you jump it, and I'm assuming your using a car to do this, then it sounds like the starter is using an unusual amount of current to start and is defective. A shorted starter will drain a battery instantly, but make sure the positive cable is not shorted to the frame anywhere first.
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