| Glossary D | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0..9 | A | B | C | D | E | F | G | H | I | J | K | L | M |
| Misc | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Damper Means of controlling speed of movement of the steering or suspension.
Desmodromic Valve gear operation in which the camshaft actively closes as well as opens the valves.
D.O.H.C. Double overhead camshaft. Two camshafts fitted into the cylinder head.
Diamond Frame Tubular frame design common until World War II and derived from the bicycle layout. The engine cases often form part of the structure. In profile it resembles a diamond shape.
Distributor Device used in the ignition system of some multi-cylinder machines to send the high tension part of the correct cylinder.
Dope Highly combustible alcohol/methanol-based fuel mixture.
Druid Forks Side-sprung girder forks. Druid were the original makers.
Duplex Double, having two parts. Applies to frames with two down tubes, and chains with double rows of rollers.
Dynamo Electric generator that produces alternating current.