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Wossis?
Nov 30, 2011 15:01:23 GMT -5
Post by plipton on Nov 30, 2011 15:01:23 GMT -5
I found this tube floating around under the tank on my bike (76 RE5A) at the weekend. It was sat on the carb and leads down to the distributor. Is this the vacuum switch tube I've read about that brings in the 2nd set of points under certain circumstances? If so as my bike only had one set of points what should I do with it?  Ta Rick |
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Wossis?
Nov 30, 2011 16:17:24 GMT -5
Post by steveuk on Nov 30, 2011 16:17:24 GMT -5
Hi, no its just an open ended pipe that clips up the frame to under the tank, the vacuum pipe comes off the inlet manifold.
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Wossis?
Nov 30, 2011 16:42:14 GMT -5
Post by plipton on Nov 30, 2011 16:42:14 GMT -5
Ta. I'll cable tie it out of harm's way.
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Wossis?
Nov 30, 2011 20:01:20 GMT -5
Post by Jess on Nov 30, 2011 20:01:20 GMT -5
Steve,
plip is absolutely correct...
It was a vent for the distributor. Sam and I had many discussions about the silliness of it.
We like to call it the hose to nowhere ;D
Best,
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Wossis?
Dec 2, 2011 10:54:54 GMT -5
Post by riversidogs on Dec 2, 2011 10:54:54 GMT -5
Not as unusual as you may think. Off road vehicles ( Jeeps ) will have these on the transmission and rear end to prevent water getting in the vents. Why this would be on a road bike??? unless they wanted to prevent rain water from getting into the points.
Tom
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Wossis?
Dec 2, 2011 11:57:11 GMT -5
Post by bdalameda on Dec 2, 2011 11:57:11 GMT -5
It is there because the ignition unit is completely sealed and if there was not a vent then pressure would build up when the engine heats up and this could cause the shaft seal to fail by exerting too much pressure against the seal on the spinning shaft or it could cause the gasket to push out of the cover.
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Post by Jess on Dec 3, 2011 0:40:56 GMT -5
Dan,
In theory... I would agree with your assesment.
In practice, I have plugged many ove the years with no ill effects.
Just my 2 cents.
Best,
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