Those plugs don't look horrible. Seen darker. I would think they would look a little leaner with the double down kit installed though. Do you know who installed the HO kit? What engine temps are you seeing when it dies? Does it feel down on power when its acting up? It has an HO kit so hard to say if the valve lash was dialed in correctly when installed also.

 

H.O Kit was installed by the dealer. What can I do to not run lean?

About the tempererature the first time it dies in idle was 190, after that can be cold or hot and does the same, runs fine not noticable loss of power, problem is only sometimes when is at idle.

I cleaned throttle body, starts and doesn't turn off yet, I will do a little test it on Monday again to see if it are ok now.

 

Possibly caused by good ole ethanol fuel sitting to long and plugging up a small passage.

 

Don't worry about running lean. By the looks of those plugs, your not lean. Test some more and try and post up as much info as possible. What your doing when it dies, engine temp, rpm's if its while your moving etc....

 

Thank you roguedriver for your help. The RZR only dies when idle, no matter the temp, can be 190-195 or cold 80-90...

Checking all possible, I noticed that my kill switch has some issues, normally I leave all battery disconnected (by the kill switch), when I tried to put the switch in on position and tried to start the RZR goes dead (like no battery were connected), then I bypassed the kill switch and seems to be working fine on idle. I will take a short ride to see if that was the problem.. hope so!...

I will keep you updated!

Thanks =)

 

Mine did this a few times. Might check throttle positioning sensor (mounted on pedal) or possibly idle air controller (IAC). Mine wound up being the IAC, good as new after the fix.