2004 foreman 450 es want shift by button

Check the connections at the computer.

check to see if actuator is moving to lock position

Have you tried draining the float bowl and examine for the presence of water?

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Could be the shifter solenoid. but most likely it's in the section where the shifter cable goes into. There is also 2 sensors on the top of it one forward and one reverse . I do believe that unit has a manual post coming out of the lower side of the engine on the left side when sitting on it. Put a socket on it and see if the bike will shift manually. If not then it's either the section with the 2 sensors on it or the mechanism inteernally itself.

Only adjust the valves when the engine is COLD!!
Intake and exhaust = .006"

bad battery?

500 rubicon trans problem. - ATVConnection.com ATV Enthusiast ...

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Sep 17, 2003 - It has low gear and reverse only will not up shift in any mode. ... Had the same problem with mine, went to my local honda shop and he had ... My lightswould flash and the trans. wouldn't do anything, had to shut ... Code 5 - Angle Sensor System (Motor lock i.e., angle sensor, wiring, .... All times are GMT -5. Honda Electric Shift (ES) Problem Solved
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Could have a wire short out to ground

check for spark