300 vs 440

wydopen

onthepipe
Is the js300 hull and driveline the same as a 440/550? Want to build a ski for my son..Found a super clean js300 hull and would like to swap a Yamaha 650 in it with the rhaas conversion kit for 440/550. I’m not a Kawi guy..I thought all the JS’s were the same?
 
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