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1972 Yamaha AT2

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Finally found AT2 in pretty good shape



I bought this AT2 knowing it had issues but looked pretty good. I enjoy working on them …

The piston slap was so bad I had to tell the seller to please shut it off. He had no idea.

I had it bored to new piston and rings. Then the engine ran away to 5k and even though I replaced both crank seals only one was popped. Clutch plates wore out so I replaced those too.

Giant spark, motor just turns. Carb issues so I sent to a professional carb rebuilder and found jets and needle sizes wrong.

Sent back and still nothing…

Plug NOT soaked…

Is it possible that something on the inside of carb that you can’t or hard to get too is clogged?

Pulled tank and hook up a temporary fuel supply so it’s getting fuel. Bowl is full.

Fuel doesn’t seem to be getting to the plug.

I have another original carb I was going to swap jets and needles and try that.

Other ideas are welcome

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bdk437
Apr 28

Got it to pop off a few times since the motor was flooded. Going to put the other carb back on along with the tank.

Kicking it seems to help too. Got the air out of the oil pump so I’m running straight fuel tomorrow after she’s all back together.

Thanks for everyone’s help

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