Question about Suzuki GSX 750 F (Katana Motorcycles

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Losing power after 4000 rpm on each gear. Bike runs good with the choke on but when it's off, im losing power and feels like it wants to die out.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: while running at highway speeds my 94 sportster lost power

Sounds like a bad coil, you should be able to have it checked at a bike shop.

Posted on Mar 19, 2009

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SOURCE: Cannot start not using the choke and rpm flattens at 4000 rpm

The air screw and the idle screw turn inward until they LIGHTLY seat, then back out one and one half turns. For the dead spot, pull the slide out of the carb and move the clip on the jet needle down one notch. Two notches if needed.

The pilot jet covers the idle function. It sounds like this is not the problem though. The high idle indicates a lean fuel mix. An air leak is leaning the mix. It could be bad intake manifold gaskets, carb and manifold not down tight, loose spark plug, cylinder head not tight, bad head gasket.

If you do want to adjust the pilot jet the, often it is adjustable from the outside of the carb. It is normally located just out side and next to the main jet. It will be brass and have a slot for a small screw driver. If no outside screw, then an inside adjustment screw means removing the float bowl. Turn the jet screw outward 1/4 to 1/2 turn.

Posted on Apr 26, 2009

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SOURCE: Bogging engine 3400-4000 RPM under full throttle.

Sounds like one of the intermittant jets is clogged. Need to clean the carbs.

Posted on Apr 30, 2009

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SOURCE: bike loses power in the mid rpm range

Try the air filter first (make sure it's clean). The needle valve on your carb slider could be bent, or not seated correctly or just set wrong. If you have a power exhaust valve, it could be set wrong or malfunctioning as well. Good luck.

Posted on Jun 25, 2009

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SOURCE: Yamaha 535 stalling out and losing power after running for a bit

Sounds like a fueling problem either water in the carbs or the fuel flow from the tap is insufficient. If there is a vacuum pipe it may have been dislodged or holed.
Ride Safe
Bike-Doc

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Posted on Aug 03, 2009

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