2011 800 pro Rich

[Sledneck_1987]

i have a 2011 pro rmk thats running rich fowling plugs after about 15 min or riding. installed afr gauge and at idle 11.7-12.2 and wide open 12.3. if let idle fowls either plug. install new plug and will run ok for about 2-3 miles then cuts out when hold wide open and goes of he gauge rich. any ideas?
thanks

 

[dutch123]

Have you changed the injectors?

 

[spencer]

How many miles on this sled ? maybe time for a top end rebuild.

 

[Sledneck_1987]

have just did top end with a 13.5-1 head. 2000 miles on sled. haven't tried injectors yet. but thinking of trying new ones. is their any other sensors or connector issues that could cause this ?