Why not just get a color anodized ADA head from JetManiac; they seem to be more popular and about the same price?
http://www.x-h2o.com/threads/80623-Jetmaniac-is-now-ADA-Dealer-ADA-Heads-throttle-wheels-etc.-BILLET-BLING
If the orifice diameter between the reduction nozzle venturi and the steering nozzle venturi is less than 2mm then the boat is hard to turn; if the difference is greater than 3.5mm to 4mm, than the steering gets real sloppy. I would just bore the reduction nozzle a bit larger for more...
No the spikes are mounted sideways and the MSD coil case is molded around the wires so they're not replaceable. Just purchase a Kawasaki coil and save yourself some cash.
Could be a water stain or from exhaust reversion because the fuel mixture is off on that cylinder. I'd spray that piston skirt with some carb cleaner and see if the stain comes off or if it's something permanently etched into the aluminum.
I've been blasting them clean with fine mesh media after they're completely disassembled and re-dipping them in Alodine 1201 or Iridite 14-2 before painting with good results.
Those diaphragms vibrate with every engine stroke and worn out from the debris inside which was caused by the salt water corrosion. The carbs should be completely disassembled and have all the fuel passages inspected & cleaned thoroughly. Also you might want to replace those valve body screws...
If you have a true ported big bore cylinder with aftermarket sleeves you'll need to know what type sleeves you have installed. Each big bore sleeve has a different diameter and flange measurement depending on the manufacturer and cylinder model fitment. If the sleeves are damaged from a rod...
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