[shadetree]

welcome to the forums, sorry I did not see your post earlier ?, your buds trx350 fourtrax needs a new c.d.i. .

 

[shadetree]

I don't understand why a fan switch would cause this problem - never heard of that around here. On a bike of that age, I'd be more concerned with a CDI going bad or a voltage regulator / rectifier problem. Do you own a good multimeter?

The next time this happens, tap on the CDI while cranking. Does it restart?

Rick

the fan works off the fan control unit, which in turn, wired to the c.d.i. these atvs have a built in safety feature for the oil temp sensor, if they over heat ?, the fan kicks in, if the fan does not kick in, either by the sensor ?, or the fan control unit ?, the c.d.i. cuts power to the spark plug to keep the motor from seizing, this info is listed in the tech section in the service manual .

 

[shadetree]

I don't understand why a fan switch would cause this problem - never heard of that around here. On a bike of that age, I'd be more concerned with a CDI going bad or a voltage regulator / rectifier problem. Do you own a good multimeter?

The next time this happens, tap on the CDI while cranking. Does it restart?

Rick

the fan works off the fan control unit, which in turn, wired to the c.d.i. these atvs have a built in safety feature for the oil temp sensor, if they over heat ?, the fan kicks in, if the fan does not kick in, either by the sensor ?, or the fan control unit ?, the c.d.i. cuts power to the spark plug to keep the motor from seizing, this info is listed in the tech section in the service manual .

Thank you for the replies and input. It never has a problem starting. Will start and idle perfect every time. Just dies right away when puting it into gear.

yep, your c.d.i is bad, i'll bank on it !.