Question about 1984 Yamaha XS 400 L Maxim

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Stalling problem from neutral to first gear

Bike has sat for over a year. Boosted the bike to start it without a battery in the bike just cables to the car battery.
Bike starts and runs in neutral fine, you can rev the engine with the bike sitting. With the clutch disengaged and putting the bike into first gear the bike stalls before you can even try to engage the clutch.
The gas is old but the bike runs fine after a short warm up just sitting it can be revved up.

The bike is the Maxim 400 Canadian version with the double overhead cam motor.

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I'm having the same issue with my 82 xs 400. Mine hasn't been sitting at all though. I rode it home two weeks ago. I put different bars on it, took off the mufflers and that's really about it. It starts and idles fine. If I put it on the stand and put it in gear, it will go through the gears with the wheel in the air spinning freely. Once I sit on it and put it in gear to go, it shuts off. I don't get it.

Posted on Sep 16, 2010

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Running the headlight will provide enough of a current sink to stop the charge system from overdoing it, although If it stalls as you select a gear(a little hard to tell if this is happening... can you confirm) , then sounds like the a clutchplate(s) has seized together. This is not an uncommon problem, and can happen when the bike has been left sitting a while. If the oil is contaminated with water the clutch plates may have swelled, and not release properly. The clutch and kick stand switches will all be the start circuit and should not kill the ignition.

Can you move(push) the bike with the clutch disengaged whilst in a gear?

regards
robotek

Posted on Nov 27, 2008

  • Graeme Ross
    Graeme Ross Nov 27, 2008

    I should add that if it does have a binding clutch, the only real solution is to strip the down the clutch and replace the friction plates, and scuff up the metal plates on a piece of concrete, If any of the metal plates have warped they too should be replaced.

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Gotta ask, does the Maxim 400 Canadian have something like clutch-safety switch and kick-stand switch ?

Posted on Nov 27, 2008

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You will need to get all of your fluids flushed since it has been sitting for that long of a time. They settle and separate and do not do what they are supposed to do to help the engine run. If fluids do not travel evenly around the engine, it will cut off.

Posted on Nov 27, 2008

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This could problem with clutch cable in the bike change the clutch cable ,if possible get the clutch overhauled in your bike...


Good luck...

Posted on Nov 27, 2008

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Hi and welcome to FixYa,

Initially, if the bike will be run without its own battery, the engine will really stall. This is because there will be no consumer for the voltage output other than the ignition system which will clamp down when the engine is revved and the voltage tends to go higher still.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 27, 2008

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