This sled came with NGK br9es plugs in it. I checked the NGK site and they list bpr9es as the correct plug, which I think is just a platinum plug. Am I ok to continue running the br's or do I need to change for some reason to the bpr's?
Polaris specs a Champion RN57YCC plug with .025" gap. The BPR9ES is a bit longer electrode than the BR9ES and is an acceptable substitute to the Champion plug. The P stands for Projecting. Your sled's combustion chamber is designed for the P plug, and that is what you should use.
The premium platinum plug would be a BPR9EP part number with the second P indicating the platinum
2007 Dragon RMK 700 155", 2008 RMK 600 155", 95 Prowler 550 2-up, Really OLD AC Cheetah
I just bought new NGK plugs for my RMK, which calls for Champion RN57YC. The Champion RN57YC / NGK BR9ES's are for the non-VES Libertys, (mine) the longer Champion RN57YCC / NGK BPR9ES's are for the VES motors. (yours)