Personal Water Craft Forum banner

yamaha powervalves

  1. 2004 gp1300r rear powervalve screw failure caused notch in piston and cylinder

    Yamaha Jetski
    hey guys im kinda new to pwcs ive owned 2 and am looking at a 2004 yamaha gp1300r. it has been sitting for the past 2 years so i asked the owner why and he said it blew up so i took it to my shop and pulled the head and the rear cylinder has a big gash on the exhaust side and a notch in the...