B3 good for racing, bad for surf riding. Won nationals 3yrs in a row after everyone insulted me for changing from B1 to B3. I now have gone overboard for the thrill of it, put a STXR 1200 with triple pipes in new hull.
Look what the is available for small aircraft/microlights. I am using one that I bought for 2/3 the price of an AG and far more power for the same amount of cells. Terminals are far stronger too.
Added a Riva drypipe to a WB2, ran rich even with HS screws all the way in. Removed plastic airbox and it revved out. Also most people don't know how restrictive their hull air intakes are. You need to strap ski to trailer in the water and rev the ski up and try lift the hood. If it lifts easily...
A stock snorkel 760 intake is too small for a stock 760 with just a pipe, going to hold your setup back. It can be improved by trimming up the centre lump on the engine side. Filters will be better
Bigger pumps allow a lower angle on blades so they cut through the water more easily while moving the same amount of water as higher pitch in a smaller pump.
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