Rotax blues

[revrider1]

I just had the SLP perf. pkg. installed on my 05 800 H.O. with wiseco 2 ring pistons and maybe 30 miles of easy trail riding started losing power only to find that one side is down. Changed plugs to no avail. This is the 3rd skidoo that i've had to tow. Haven't taken it to the shop but was wondering what you guys might think is wrong. Motor is not seized as I rode it in the trailer. Just spent $5500 on this sled instead of buying an xp. I'm kinda bummed. Thanks

 

[winter brew]

What do you mean by "one side is down"? Fouled plug or hole in the piston?
Are the cylinders ported?

 

[revrider1]

rotax blues

I mean its only running on 1 cylinder. Yes the cylinders are ported. thanks

 

[skidoorulz]

Get rid of the weisco pistons. Mic em I am sure you will find 2 differant sizes. I had weiscos in my 800 once, had same problem. Mic'd them and found that there was 30 thous differance between the 2 and that they were both smaller than Doo's recommended tollerance. Went back to Doo pistons. No prtoblem since