Hello , new user and fairly new to Ski's as far as working on them. I have just purchased a 2001 XLT for a reasonable price. it has 150 hours on it. i knew it had an issue when purchasing and it is why I got it for a decent price, and I like a challenge. The previous owner had the Pistons, and sleeves replaced last summer. since then he had put about 4 hours on the ski. He started having issues of the ski only getting to about 7 to maybe 10 MPH. He had the D plate and chip mod done, thinking that it was his Cat that was bad and causing the issue. The issue still persists. This is day one i have had the ski, bought it and drove to lake and took for test drive to see for myself. I have just ordered the waveeater clips and coupler kit. I hope I can figure out the install ( pics on waveeater site are pretty small, if i click on them to enlarge it kicks me out of the instruction page). I am just wondering if there is something that i can check and try to get things working. I will put a new fuel filter when i get back to the lake. Also, the owner said his mechanic did a compression test after the new pistons, however he did not know the pressures. I will check next time I get out there. Could the exhaust be plugged somewhere and the mechanic not notice or look? it seems to have the same problem as before the D plate and chip. Any help, in plain english would be greatly appreciated(avoid using accronyms please) or links to threads would be awesome. thanks