Question about 2002 Suzuki GSX-R 1000

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Starts easily, idles perfect, runs strong to about 7K RPM then cuts out as if hitting rev limiter.When try to run it past 7K RPM seems to" kick in" a bit as if some cylinders are intemittantly fireing. No FI error on speedo and no codes when try to run error codes. Had it to an independent mechanic certified in general suzuki repair and he was confident it was the secondary throttle servo so we replaced it with one that appeared to work well but made no difference. We tried a different ECU from same year-modle bike but made no difference. Tried putting in fresh fuel and some injector cleaner and still no better. Valve clearances are are okay. Plugs look fine. Any ideas?

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Fuel PRESSURE may hold but volume may not be there. Have you pulled the fuel pump and checked the sock? May be its getting clogged. Check the internal O rings in the pump assembly to see they are in good shape. If that fails to cure, test the pump for fuel volume using the discharge test. It should be 220 ml or more/10 seconds. If you're still stuck, have the injectors ultrasonically cleaned. The injector issue may be the culprit. Multi-holes clog when you look at them wrong. It also fits with your increased rev limit when the engine's just started, as the injector pulse width is increased.-----Remove and recheck side stand switch wires.If they are getting short or loose it can also cause this problem. ------------ Also check the battery, stator voltages, are they getting hot after the bike cuts off.If thats the case then any of them is getting weak or battery loosing its charge or stator stops charging battery after getting hot/warm. ---------- This should help.Thanks,.Helpmech.

Posted on May 22, 2011

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