EXTENDED B/B AXLE & TWO MORE CHAIN TENSIONERS INSTALLED...
Freshly welded-up extended bottom bracket axle now fitted, providing the necessary clearance required for the left side pedal to clear the engine case. After welding on the axle's 30mm extension, the axle was re-blackened by heating then quenching in oil. First pic shows the result.
Also installed two more chain tensioners - one to the primary chain and the other to the left side drive chain. Meaning all three chains are now correctly tensioned. The remainder of the pics hopefully depict how the sprung tensioners are intended to operate.
Bit the bullet and decided to unpack my lathe and turn down the primary chain's rear sprocket rather than wait until we're relocated to Spain. Sprocket's teeth were reduced from 3/8" wide to 3/16" in order to be compatible with the primary chain. Didn't really anticipate having to go to this much trouble but I had zero choice after finding it impossible to obtain a sprocket matching my Gnome Rhone motor's output sprocket. The freshly skimmed-down sprocket locates onto the 5/8" diameter jackshaft via a taper bearing. Neat.
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