The main load bearing 'drive' bearing is best lubed by a constant supply of transmission oil: both Innocenti and Piaggio agreed. Though Innocenti more thickly and intensley 'v' Piaggio more thinly and sparingly.psychedelicropcircle wrote:1950's S1 technology
Mag/fly side Innocenti rapidly dropped the idea, Piaggio continued with it.
Design differences: The Vespa fly bearing has an oil feed hole and by gravity drains into the crank case. The Innocenti design had an oil feed passage into a large 'blind passage': with no escape for contaminants.
The Innocenti design has the fly bearing at a greater distance from the crank centre than the Piaggio one. Therefore 'run-out' on the fly taper is going to be greater for Innocenti than Piaggio on a 'like-for-like' bearing wear machine.
Single outer mag seal failure is therefore more likely with this Innocenti design.
However, the proximity to the torque forces of the crank and the load bearing dictated by that makes the PX fly bearing the weak point in the system: Smallframes and Lambrettas do not suffer the failure rate that PX'es do. (T5, Rally got it right)
Why the fcuk you would want to re-introduce pet/oil lube for the Lambretta mag bearing baffles me: it will be a trap for the contaminants, swimming in p/o mix, trying to escape through an inadequate seal at the very end of an oscilating shaft....?
Surely better to design a better double seal and lubrication medium for the Lambretts mag bearing?
(Vespa fly bearings will be discussed seperatly please)
; plus ifiny mod the mag flange woodnt y be able T fit the little seal without rippin apart the engine? sneakin a peak round the scoota race scene this is somit thats alredy used f racin,