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Just wondering if it had adequate clearance,this is exactly what happens when the clearance is too small, piston grows larger than the bore its supposed to fit in then boom, no compression.

Did you have this bored when you put it together, improper clearance maybe, it ran way lean or way too hot.

The issue is not fixable with that carb , the port for the low speed circuit is too low in the carb, the gas drains out the port into the carb throat, flooding the engine when ho, on later model carbs the raised the position of that port in the carb to rectify the problem.

Yet I don't believe you will be getting a ride report from this cat anytime soon lol

Dammit Travis I had already chosen my weapon too

So its Ten paces at dawn then, choose your weapon sir !

No Travis you cannot have a mirror finish on a bore and have compression, no crosshatch = no oil retention = no compression, what is so hard to understand about this concept ? I HAVE JUST PROVEN MY THEORY CORRECT, YOUR TURN !

Ummm no Travis I am afraid not, the oil in the crosshatch is what seals the rings and creates compression, I have on more than one occasion seen engines with extremely low compression because of lack of oil on the cylinder crosshatch, I had one come back to life yesterday Pink 1993 Seadoo...

OEM Kawi pistons are fairly light and operate at better clearances.

Travis trust me I don't have to be told, but seriously the compression will only come up if the rings seat in, the only other thing that can possibly bring the compression up is carbon buildup on the piston crown and combustion chamber, I guess if you substituted 30 weight non detergent motor...

Oh its a beautiful part, two things the flywheel key dug a groove into the inside of the taper and the magnets are toast, magnets that are supposed to last 600 years mind you, no warranty, no way to fix it , might make a nice looking wall clock lol

I am just Curious Travis can you explain how the compression went up without the rings seating in, I can't wait to hear this one.

Yeah 57 years ago on a Chevy 265 small block, after that not so much

Yes you can make them fror old inner tubes or sheet rubber using the carb and exhaust as the block off plates, slip the rubber pieces in there and bolt the head pipe and carb back on.

You guys are too much !

Yes exactly, it should not leak more than a lb per minute, I usually go for 10-15lbs of pressure

Do a pressure test on the engine before you disassemble it, otherwise you may never know what happened.

I always thought the 66e platform had potential but it seemed like no one ever quite figured it out, everyone had one and then they all disappeared.

I have a nice Jetinetics paperweight here, I would use it for a doorstop but its not heavy enough for that.