I currently own 4 Yamaha 4 stroke sleds, all in 144, with 1 reduced to 136 because Fast doesn't make the M20 Airwave in a 144. The Apex began life. a 144, now has the Airwave. Venture, conventional 144. Nytro, Cat 141 setback for 144. And an Attak with an ExpertX 136, setback for 144. Sensing a...