Hi folks, this is partly a question for Magnetoman or anyone else who may have fitted an adjustable magneto pinion:
Unlike the original, the variable pinion boss is not chamfered, so I was wondering if you fitted any sort of material between the pinion & case to try to stem the seepage of oil.
My timing cover has the original type (useless) felt washer and metal retainer between mag and case, but nothing between pinion and case, also nothing over the taper to impede oil ingress to the magneto. I have bought a rubber washer to replace the felt; Waller talks about fitting a "velumoid or similar material circular washer over the armature spindle...". No mention if anything between pinion & cover though.
I'd like to do what I can to reduce leakage before fitting the adjustable pinion, so would appreciate any guidance.