Honda Foreman 500 Intermittent Spark problem

[David1234 3]

Hi all,

I have a Honda Foreman 500 with a spark problem. The engine had no spark and after further investigation I discovered that the Stator had shorted to the engine. So I changed the Stator and ignition pule sensor and now the machine will make an attempt to fire up but will not start. I then changed the voltage rectifier but still the issue remains. Then by accident I discovered that if I unplug the Stator or rectifier the engine starts first tip and runs perfect. I can even plug the stator and rectifier back in while it is running without issue. However if I try and start it again with everything connected it refuses to start. Would anybody have any idea what is causing this issue. I am tempted to run a bypass on the stator to make it start, but would like to know the cause of the issue. Any help is greatly appreciated.

 

Thanks

David

[jeepwm69 7,619]

Welcome aboard. 

 

First question is, what year is the machine?

 

Second question is, did you use OEM or amazon/ebay chinese parts?

[David1234 3]

Hi,

I used a Genuine Honda Stator and Honda ignition pulse generator. For the rectifier i changed it with a cheap Chinese one. I thought that the Chinese one might have been the issue so I replaced this with a second hand Honda one from a breaker.

It's a hydrostatic model, year 2010.

 

 

[jeepwm69 7,619]

So Rubicon TRX500FA. 
 

Odd problem certainly.  Wonder if it has to do with the diode in the fuse box?  
 

@Melatv @retro @AKATV thoughts?

[retro 4,049]

Is the battery healthy? Does the starter crank the motor over at normal speed?

 

What is the full model number and the country (USA, Canada, UK, Australia, Sweden) of origin?

 

 

[David1234 3]

Hi all,

Thanks for your feedback and suggestions.

I got the problem solved. Upon further investigation of the wiring loom, I discovered that there was no earth cable connecting the engine to the bike frame even though there is one listed on the wiring diagram. I connected a cable between them and the bike started first tip. It appears that there was never a cable on it. Maybe a previous owner removed it during a repair job.