Question about 2000 Yamaha XJ 900 S Diversion

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Engine stutters when turned on

The rev. counter needle jumps to 10 000 rpm when the engine is turned on and returns back to 0 rpm, after 3-5 seconds the whole process is repeated. The bike starts easily and idles good but when I start to turn the throttle to +- 5000 rpm the engine stutters and dies. If the throttle is opened fast the engine stutters and dies. Could this maybe be the throttle positioning sensor that causes the problem and if, how can it be tested?

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I had the same problem. it was a coroded connector that was not advancing the timing. it would idle fine and go off the line but any thing over a bout a 1/4 throttle it "bogged". the plug/connector is located on the left side under the faring by the top of the rad. there are a bunch of connectors there so unplug them all and clean them with WD-40. hope that helps!

Posted on Apr 26, 2013

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To adjust the throttle position sensor, switch ignition 'on' then disconnect and reconnect the the connection at the TPS. Loosen the TPS fixing screws  x2 and swivel the sensor until the rev counter reads 5000rpm.Don't switch the ignition 'off' during the procedure as this sets it back into 'normal' mode. If you can't get a proper reading then it could be the sensor is faulty.   The TPS is on the left hand carb spindle.

Posted on Mar 06, 2009

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Try it with the fuel tank on reserve

Posted on Jan 19, 2009

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