550 sx (late model engine). Dual 44 super BN's, 15 psi pop off, 95 low speed, 132.5 high speed,  Prok filters, Boysen dual stage reeds, R&D intake, ports matched to carbs and cylinder. Trued, welded crank, Weiscos , 76mm,  ported pistons, PJS head, milled, 165 compression, (static)  stock cylinder, ported, tranfer slots cleaned up. PJS exhaust manifold, port matched to cylinder and PJS head pipe + 2mm, Turbo muffler exhaust silencers into rear exit exhaust   Dyna total loss ignition and flywheel. Odessy 625- Lasts two days on a charge, 10-12 hours ride time. 440 pump cleaned up , bearing box support, 18 pitch SS prop, OceanPro exit nozzle, bored,R&D toploader intake grate, PJS extended ride plate, Billet steering support, billet quick steer plate, Umi finger throttle, aluminum hand pole, reinforced hull with side braces, nose brace handpole brace. 50+mph 9800 rpm Will toast 650 -701- 750- 800  cost to build     1600 total + Labor     Been running for 5-6 years (3-4 hones, 2 overbores)