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What are the views on 2 start oil pumps
If the standard oil pump was known to have shortcomings then I would be the first to change it . However, they dont have, so stay as standard and enjoy the ride. Valve stem oil seals are a different matter altogether. Fit them and slash oil consumption, eliminate one cause of oil smoke, improve idling by reducing air ingress at inlet valve stem, improve plug life and cold starting and again, enjoy the ride.
Not quite right Len. The Picador ran a two start worm wheel on a single start pump.Two start Oil Pumps came about when the Factory was developing the Picador engine. That had to run flat out continuously, something a bike rarely does. For all practical purposes the standard pump is perfectly adequate. One useful idea some riders have adopted is to fit a filter in the return line to the tank, bearing in mind that what the scavange side of the pump picks up from the bottom of the crankcase may be full of you-know-what. A magnetic drain plug is a must. Installing a gear pump would be a major engineering task although I think it has been done. Beneficial or not? Comments please.
How about this for an idea, fit a 2 start pump, valve stem oil seals and feed the rockers from the main side of the pump, not on the return side, giving better flow to the cams which need all the oil they can get, via the rockers, push rods ect. Then fit an oil filter to the return side before the oil reaches the tank.
Feeding the rockers from the pressure side of the pump is Steve Hamel's idea, not mine, sounds good to me,
What are your thoughts guys.