It's because yamaha parts are super expensive and hard to come by,the hulks break and take a ton of time and money to reinforce and defoam and rebuild, the stock motors suck balls and have to be modified before they are any fun to ride, the motors ting so hard that you constantly gave to wrench on them and they will rip pipe mounts off anything that bolts to the cylinder....with that said...after you install footholds put a head and pipe,prop and reinforce the inside of the hull.... Miles ahead of kawi,my name is Russell and I've been a kawi guy for 20 years but after owning 1 superjet I'm hooked and am a full blown crack head...ride a 760 round nose with a mag pump 1 time and all your kawi stuff will be for sale in the morning