CON­TROL­LING FLUT­TER

Classic Bike (UK) - - News -

Camshaft drive by chain is lighter than gears or a bevel shaft and more tol­er­ant of di­men­sional change due to heat ex­pan­sion. Like the first ohc AJS rac­ing en­gine of 1927, the G50’s drive fea­tures the Weller ten­sioner patented by John Weller of AC cars for a 1919 ohc car en­gine. Chain flut­ter is re­strained by a ten­sioner blade faced with a rub­bing strip and kept bowed by a spring that holds it against the for­ward run. To deal with re­ver­sal loads from the valve springs, the blade is con­nected to an oil-damped slider on the rear of the tim­ing cover.

An oil-damped slider stead­ies the cam chain ten­sioner blade

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