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The bolts that hold the engine to the motor mount plate have nothing to do with a oil leak. But they should be tight.

Oil fill cap ( or the plug on the other side of the engine ) oil drain plug, loose side cover bolts, or valve cover gasket. These are about the only places it could come from. You might have to remove clutch cover or guards to get a good look.

The Amazon parts are OK most of the time. I have built several of these engines. I much prefer to do business with a real go kart supply shop. Go Power Sports and OldMiniBikes Warehouse are the two vendors that I have done a lot of business with.

I remember seeing him a few times boxing on TV. Don't think I ever saw him take anybody out as quick as in what you posted. Great entertainment.

I hadn't really looked at anything other than your sprockets. You got your hands on 4 spiderboxes. Those are really sought after ( at least in California, where I am). The biggest most comfortable kart they built. What a score. Good luck with your builds. Keep us updated as you progress with...

Are all 4 of your karts the same, or similar? I have owned a couple of older Yerf-Dogs, still own one of them. Rugged and dependable. Grandkids have had a lot of fun with it.

What size ( tooth count ) are the rear sprockets that you don't want to move? Most GY-6 powered karts that I know of have a small 40 tooth sprocket. If that is what you have, you are going to need to change to a 60 tooth in order to use a torque converter. Your karts probably have 1" rear axles...

It confuses A lot of people, being that the engine is manufactured in China, and the majority of fasteners and measurements are metric. Then when you go to bolt on a clutch or even a torque converter, the holes are tapped in standard American sizes. Go figure. Lots of stripped side covers out...

It does look like a frog. Very much so. Yet very cool in it's own way.

If it fits perfectly, then use it. That is same size and thread count as used on the 212 & 224.

That took some pretty big ones to ride that. ET is actually slow for a speed of 145 mph. Surprised he didn't run a slick instead of a treaded tire. I suppose if it hooked up right away it might have been even more dangerous.

That was a really neat video. Thanks for sharing. I wish it were longer.

One of the most important people in the birth of hot rodding. He most likely touched many millions in one way or another. Yeah, we ran one of his roller cams ( son and I ) in our Nova. RIP.

What a very nice gesture. Glad you got it.

The information you posted in post #1 has you on the right track. Especially using the stock cam with ratio rockers. A high duration cam will hurt bottom end and want to make power in the upper rpm range ( not what you're looking for ). The longer stroke crank ( with no other changes ) is going...

Looks like you might have room for a torque converter if you wanted to keep the oversized tires on it. It would then turn them easily.

No idea. But it's very cool and very old. Looks like it could have been made the same year I was. I like it.

OOOOH, I'm in love. And it's only about 90 minutes away. But right now it's a little too rich for my blood. If the first number were a 3 instead of a 5, I think I would be contacting the seller.

New California laws. Oh boy. I can't wait.

Not by very much. Go back and read post # 8 and 10 a second time. For $149 Not even on sale ( and they go on sale several times a year ) you get a brand new one instead of monkeying around with some who knows what. And then, buying and replacing the crank. I mean if you're that broke, get a part...