[b_sherwood3]

2005 Have a Honda rancher 400AT that dies when it gets warm. It will start back up when it cools down, not sure what it could be? Any help would be appreciated. Cleaned carb, changed voltage regulator and stator. You can rev it up and it runs fine when it has net yet warmed up. Will not restart until cooled down some.

 

[Jeepwm69]

Next time it does it pull the spark plug and see if you have spark.

If I had to guess you have an electrical component overheating that is killing spark when hot, and when it cools off it starts working again. CDI or regulator most likely if you don't have spark when it's hot.

 

[ATC4ever]

Another thing to check, is the fuel delivery....could be the carb is filling back up while you are waiting to start it again. Just a thought...

 

[wheelsquad]

@b_sherwood3 my 400AT used to do the same thing and I thought for sure it was electrical related.... But it ended up not being that...

When was the last time you really cleaned out your oil cooler? And how often does your fan come on? My oil cooler was completely plugged and the source of mine running too hot. It had never been in mud before so I figured no way it could be clogged. But just for dust and other riding debris over the years. Pressure washing it got rid of all my hot problems. And I run a manual fan switch cause if the oil temp sensor goes, the default failure mode of the sensor is to never turn the fan on. These 400AT's run hot cause they only hold 3 qts of oil and are air cooled and also use the oil for the hondamatic hydraulic pump and motor.

 

[b_sherwood3]

Thanks for the replies, this is my buddies bike and he was asking me some questions. I don't have much experience with the 400AT so I figured I would ask the experts.

 

[Dan1]

shifting issues

2005 Have a Honda rancher 400AT that dies when it gets warm. It will start back up when it cools down, not sure what it could be? Any help would be appreciated. Cleaned carb, changed voltage regulator and stator. You can rev it up and it runs fine when it has net yet warmed up. Will not restart until cooled down some.

I have a rancher that won't shift out of neutral as it would restart eventually once its cooled down as there was a call for the oil cooler fan to start running. Once its cooled down enough to be able to restart when I could be able to shift out of neutral without the error code in the gear shift indicator.

 

[SamUK]

Had this issue recently with an Arctic Cat build, turns out that the spark plug gap was ridiculously small and the plug boot was very worn inside where it locates onto the plug, new spark plug and boot fixed the issue completely.

I’ve never experienced an issue like this so that’s all I have to offer. Might be worth a shot before you throw money at it.