Posted by Crazy Horse on November 04, 2022 at 08:56:20 from (204.191.200.176):
The link below explains German company NSU's 'Ultramax' design for driving their overhead cams. This example is for their 2-cylinder car engine version, one drive unit is in beige while the other is blue. Same thing accomplished as timing chains, timing belts, pushrods, geared shafts, etc. which do the same thing. My brother had a '56 NSU Max motorcycle, a single-cylinder 250cc bike back in the early 60's. It used the same system but just the one cylinder. At the end of the link is a separate link which takes you to a workshop manual which gets into the disassembly a bit. I'll stick with flatheads .... this would be way beyond my expertise.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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