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Theres a couple of pictures in Butch Baers great book (The new 1928 Indian 101 Scout) acenturyofmotorcycling.com Lots of mods on this engine in an early short frame. 101 type crankcase with thru mount bolt. Dual rear late Sport Scout or 841 cylinders. Front cam reversed direction with an extra gear fabricated. Intermediate mag. gears relocated. Home made alum.oil pump. Outer support bearing at crankshaft drive gear. Oil tank under the engine. Front mounted mag. Mechanical rev.counter. Hand clutch conversion. Twist grip gear change most probably. I can't see if theres any rear brake. Bump start.