| Glossary O | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
O.H.C. Overhead camshaft.
O.H.V. Overhead valve. Valves situated in the cylinder head above the combustion chamber. They are operated by pushrods controlled by a camshaft situated below the cylinder head.
Open Frame See step-thru.
Open Cradle Frame Frame without tubes running under the engine. The engine unit bolts into place between the front downtube and the swingarm pivot area as a semi-stressed or stressed member.
Over Square An engine with a greater cylinder bore than piston stroke.