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This video is the initial fireup on the 1913 Excelsior 61ci twin model 7C after a complete engine rebuild. I had a couple of short " almost starts " before this while it was getting fuel into the engine and oil worked around. Carburetor settings were amazingly pretty close. The clutch on the left grip gets gradually engaged while pedaling to start turning the engine over. Then rotating the right throttle control drops the compression relief on the exhaust valves to build compression and fire up. I was so focused on making sure the motor sounds were correct that I forgot to disengage the clutch after startup. The rear wheel should freewheel to a gradual stop to take the machine off the stand and be ready to ride.
02/21/2018
This is an interesting engine restoration I am doing for a client. A 1972 Yankee 500Z twin cylinder 500cc 2 stroke, one of 760 machines produced in Schenectady, New York. Designed to be the ultimate enduro motorcycle available, the engine is a serious piece of engineering with designs only available on factory race engines of the period. The motors were made by Ossa in Spain. Some of the features include; a 6 speed cassette type transmission with a dry clutch, two crankshaft assemblies coupled together in the center by the primary drive sprocket, two individual Motoplat ignitions, the coupler has multiple keyways to configure the crankshafts for either 180 degree or 360 degree firing. The cylinders and heads are remachined Ossa 250 Pioneer parts.After a devaluation of the dollar during that time, the bikes became too expensive to make and production was ceased after a two year run. But what a great platform for a vintage roadracer.
12/12/2017
Some more throwbacks! Bore Tech has always been interested in high speed motorcycles. Here is Duke Johnston bravely testing out a machine that was almost too much to handle.
12/05/2017
Who remembers when the shop was red and then blue? Bonus points if you can give us the approximate year each picture was taken. (Hint: that's little Michael in the "blue" picture)
Also, you get an additional 50 points for every time you backed into that pole 🤣😁
12/05/2017
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5977 Hutchinson Road
Batavia, OH
45103