oil circulation problem 1973 bullet

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oil circulation problem 1973 bullet

gremlinbiker
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having just built an engine from parts ,i just cannot get the oil to return when running , ive changed the oil pumps ,cleaned the timing cover and blown out the oilways with compressed air ,loosening the feed bolt to the big end shows oil is being pumped through the crank but when i remove the slump plug theres no oil inside the crankcases for the return pump to pump if i blow compressed air down the crankshaft i can feal the air freely flowing out via the breather valve and sump plug hole , if i pump oil into the crancases via the breather the oil flows via the return pump to the rockers but when the oil runs out the flow stops , im baffled ,
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