I have a 2005 RXP with 192 hours on it with a Riva Stage I kit. I thought it was running strong until a friend of mine bought an 06 RXP (Stock) and his ski is able to keep up to mine and sometimes even take me. We immediately noticed that his RPMs were going all the way up to 8100-200 but my RPMs were only getting to 7750-7800. We noticed that my wear ring was a little worn so we swapped that out for a new one and it's now a little stronger but rpms are still the same. Im about to do an oil change since i noticed the oil level was a little above the top line on the dipstick but does anyone have any other suggestions as to what it may be?