Quote:
Originally Posted by backofbeyond
What were they called? A Schrader valve or something like that. Had one back in the 70's. As you say, not much use on a single but it worked well enough on multi cylinder engines with normal sized plugs - ie cars! Most of the Japanese bikes we all rode back then had smaller plugs that it wouldn't fit.
Biggest worry was that you'd be filling your tyre with petrol vapour rather than air. The manufacturers said no, everyone else said yes. I had no idea but I do remember making sure nobody was smoking nearby when we were checking tyre pressures!
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I was once told Schrader pumps didn't use the compressed gas from the engine's cylinder as I recall, they used the cylinder pressure to drive a separate pump piston in the pump body.
Not too sure if this is true though.
What is true is that they were pretty useless.
Ted Simon set out with one, but there was never any mention in Jupiter's of him actually using it.
I had one in the late 70's and found that the hand pump that used to be supplied with BMW's, back in the day when they were made by Bavarians who prided their national product, was much quicker.
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