THIS IS A KAWASAKI 550JS/SX CONVERSION KIT. IT PUTS A 650 OR BIGGER MOTOR IN THE HULL FOR BETTER ALL AROUND PREFORMANCE. I HAD IT IN MY SKI AND WORKED GREAT!!! KIT INCLUDES: 550/ 650-750 CONVERSION PLATE FULL PJS RACE EXHAUST COMPLETE 650 MOTOR W/ ONLY 5 HRS BREAK IN TIME (BRAND NEW) CUSTOM MOTOR PAN AFTERMARKET PUMP BRACE (HELPS DISTIBUTE THE ADDED POWER.) AND WIRING IN STRUCTIONS (CAN WALK YOU THROUGH IT IF THE KIT IS BAUGHT) ONE OF THE PICTURES BELOW IS HOW IT LOOKS IN YOU 550 SKI, OPEN TO TRADING FOR A KAWASAKI 750SX HULL RUNNING OR NOT!!! ALSO HAVE LOTS MORE 550 PARTS AND HULL'S CALL (907) 310-2216 Location: ANCH it's NOT ok to contact this poster with services or other commercial interests alaska