what is the compression on a 03 prox 800 supposed to be, and when should you check the exhaust valves for cleaning, this sled has been running excellent gets up to 100 mph no problem looking for some info on getting some more out of it . ps . stock sled :)

I clean my exhaust valves every couple hundred miles.

They may not need it but I do it anyway.

Once you clean them once and know what your doing it only takes 15 minutes to do them both.

Last year at the AMSnow shootout their 03 Prox 800 had a compression of 155psi.