2013 rpo r switchback 800 rich left cylinder

[racer487]

I have a 2013 pro r switchback 800. Has an Indy Specialties long rod engine. Started this season it seamed fine but part way through it started fouling the left plug. With new plug it will run great for about 60 miles or so then starts to foul out. It will clear up if I punch it a few times but it comes to a point I have to change it. Tried changing coils since it was easy to try but didn't change. Compression is 120 both holes. I'm going to try switching fuel injectors next. Has anybody had this problem? Also does anyone know if you can get just the injectors anywhere? Polaris only sells the whole assembly with harness for $339

 

[racer487]

I have a 2013 pro r switchback 800. Has an Indy Specialties long rod engine. Started this season it seamed fine but part way through it started fouling the left plug. With new plug it will run great for about 60 miles or so then starts to foul out. It will clear up if I punch it a few times but it comes to a point I have to change it. Tried changing coils since it was easy to try but didn't change. Compression is 120 both holes. I'm going to try switching fuel injectors next. Has anybody had this problem? Also does anyone know if you can get just the injectors anywhere? Polaris only sells the whole assembly with harness for $339

Found the problem. It was the one way check valves that are in the block & to cylinders were not holding pressure. I replaced all of them'