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SUZUKI Suzuki Hayabusa's hot start issue GSX1300R HAYABUSA

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MCN  says:

Suzuki Hayabusa's hot start issue

Q. I have a 1999 Hayabusa with a hot start problem. It starts fine when cold and on choke, and also when hot if you start straight away after stopping, such as after fuelling up. The problems start if it’s left for 20 minutes or so; the engine turns over fine but it will not start. I can smell fuel when...

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  • Posted 3 years ago (30 November 2011 11:19)

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Dec 12

Posts: 1

hot start

On hayabusas the air intake temperature sensor (IAT) is located underneath the airbox (literally above the engine) on the left side of the bike near the throttle body. The problem I believe you have is heat soak. The IAT gets hot with the engine giving off its heat (especially when stationery), and this sensor provides a "hotter than actual" temperature reading when you come to start it. I relocated mine to the left hand side intake trunking beside the relay clusters. This prevents the engine's heat from overheating it when the bike is stationery. I imagine you'd have no other running problems, especially when the bike's on the go collecting cool air. Your cold starting ability tends to support this. It doesn't affect fuel economy and it's completely cured it. The hotter the sensor, the hotter your ecu thinks the air temperature is so the engine runs leaner....this makes it hotter and so.on,,,until you reach speed when the rush of much colder air cools it to an extent. Hope this helps.

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