Quote:
Originally Posted by Flip
.....Now, assuming I fit the overhaul kit to the vacuum pump how do I know that the problem isn't the vacuum petrol cock and if it isn't working as it should would it simply flow fuel permanently to the pump?
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I wouldn't have thought so.
Well not if the diaphragm is underperforming anyway because surely that would cause it to OPEN less effectively .. ie it fails closed rather than open (just as it closes when the engine stops and there is no vacuum applied to the diaphragm).
On the other hand if the sealing element fails it would presumably dribble (or open fully).
...if that's what you're getting at, though it sounds a bit suck eggsy to me so sorry if I've got the wrong end of the stick.
As it happens, I'm going to fit a tank with an internal, electric pump to my 750.
The external "tuna can" pump is untidy and disrupts airflow to the rear cylinder in my estimation (sits right in the flow that my airscoop collects actually).