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runs at idle but dies when in gear

This is a discussion on runs at idle but dies when in gear within the Yamaha YFZ450/450R (2004-Present) forums, part of the Performance /Technical category; i just put some new pro tapers and a new clutch lever because of a wheely gone bad. today i decide to give it a ...


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Old 11-21-2006, 05:18 PM   #1
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i just put some new pro tapers and a new clutch lever because of a wheely gone bad. today i decide to give it a ride around the block but after 40 or so feet it just dies. when its in neutral is revs fine, but as soon as i ease the clutch into gear it just cuts. anyone know the problem?
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Old 11-24-2006, 10:38 PM   #2
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does anybody know where to splice the wire from?
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Old 11-24-2006, 10:42 PM   #3
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Is it lurching forward and then dying, or is it just dying as soon as you put it into gear without letting the clutch out?
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Old 11-24-2006, 10:51 PM   #4
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as soon as i ease out the clutch into gear it dies. i found out it was my tors tps wire but i dont know where to cut/splice it from?
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Old 10-16-2008, 10:27 PM   #5
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I am having the same problem, any ideas? Revvs fine, as soon as I let out the clutch and begin to put a load on the motor, it dies. I have ripped of the clutch switch thing, so I know it has nothing to do with that.
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Old 10-17-2008, 11:33 AM   #6
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the wire that comes out of the bottom of the clutch, there are only two wires, you can trace it back under your hood, cut them strip them, and connect them together. or find the spot were they connect to the harness, unplug them, and plug the two harness wires together. either way, as long as the two wires become one loop.

mx thunder. what do you mean "ripped the clutch switch thing"
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Old 10-17-2008, 12:55 PM   #7
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I mean I took that switch off the clutch perch that you are speaking of, so I have eliminated it from the equasion. I can make it go if i revv it all the way then let out on the clutch real fast, but when I let out normal with just a little throttle the motor stops dead in its tracks, like it is loosing spark or something. Im guessing a bad compenent such as the CDI but im trying to narrow down the possibilities.
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