Motorcycle Acronyms | WTF do they mean"
Have you ever been left baffled by some clever-dick salesman reeling off a bunch of letters" Or flummoxed by a web post or magazine article because everything?s DRL this and TFT that" Well you won?t be the only one. So to help shed some light on the confusing motorcycle acronyms that are slowly taking over the industry, here?s a glossary of all the ones we can think of. If there are any we?ve missed, let us know?
DOHC/SOHC
Double Overhead Cam/Single Overhead Cam.
In simple terms, cams are the things in your engine that open and close your inlet and exhaust valves. Most modern bike engines have a camshaft to operate the inlet valves and a separate one to operate the exhaust valves; so ?double? overhead cam (sometimes called ?dual?).
Some engines still do have a single overhead cam. That just means the exhaust cam lobe and the inlet cam lobe are all on the same shaft.
It?s ?overhead? because the cams are directly driving the cams from above, rather than having a complicated system of pushrods and levers.
TDC
Top Dead Centre
This one isn?t really that important for the normal everyday motorcyclist. TDC refers to the point when the piston is at the very top of it?s stroke. It?s important when you?re building engines, tuning engines, checking your valve timing or anything like that.
RPM
Revs Per Minute
The amount of times your engine rotates in one minute. In other words, the unit of measurement used to describe engine speed.
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