Having the same problem with mine. Swapped out the BR9EA plugs with BR9EYA plugs, got rid of the Extreme Polaris oil, and put in the VES. Made it an entire ride without fouling plugs.
Went to the dealer to investigate the problem, and have new injectors on the way.
I think that the Alpha's track is what kept it in the game. Very impressive for an 800 machine. The 850 with the 2.6 combination worked well. We didn't have a 3" 850 to test with. As far as riders go, I did ride the 850 Doo, , and the 850 Polaris. The alpha was ridden by a very capable rider...
So finally got a chance to try these three sleds on the hill head to head. 2019 Polaris 850 with 163 2.6", Alpha with 165", and a 2018 Doo 850 with a 165 3". Fresh snow on the hill, each sled taking it own track up the hill. Very close between the Alpha and the Polaris, but sorry Doo guys, the...
Dropped it off on Tuesday morning, had the sled back with a new motor Wednesday at noon. Gotta love service like that. Really impressed with the dealer here in Kamloops
5.2 kms from the truck! It wasn't revving past 7400, so we changed the plugs. Cleaned up and was a rocket for about 2 kms. Then it became a boat anchor. Oh well, new motor is on the shelf. They are easy to swap out, so should be up and running for the weekend.
It is a buddies sled, but I am pretty sure it was an early one. I was talking to the dealer about the crank issues a few days ago, and they said it was a problem with too much sealant between the cases that plug up some oil ports. It literally failed 2kms after the break in. Sled started running...
I had the luxury of another pro there so I could swap out all of the easy parts like the rectifier, relay, capacitor. lol. If it ends up being the wiring harness, let me know!! I have a spare one!But that is what mine did and it and it was the stator.