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OEM
- 1. An acronym, "Original Equipment from Manufacturer," refers to parts or
components. 2. The companies that build the
bikes.
O Ring
- A rubber sealing part. Does not need to be in the shape of an O.
O.F.F.O. (OFFO) -
Outlaws Forever Forever Outlaws
Octane
Rating - Indicates the ability of a
fuel to resist early detonation called knock.
Odometer - Device that stores the mileage (distance driven). Usually
located on the speedometer.
Off-camber Turn - Turn that is banked higher on the inside than the
outside.
Off-road
Bike - Term for a motorcycle designed specifically for off-road
use.
Off-road helmet - Motorcycle helmet with a chin guard and sun shield
but no visor.
OHC
- OverHead Cam.
OHV
- Overhead Valve.
Oil
Bath - Lubrication by complete submergence into oil.
Oil
Cooler - Engine cooling system where the engine's oil is sent through
an external radiator to help remove heat from the engine.
Oil Bag -
Oil tank
Oil Dripper
- Slang term, refers to the earlier American and British bikes and often
still used towards the modern ones.
Oilheads -
Newer, air and oil cooled BMW Boxer engines.
Oil Pressure
Warning Light - Too Late Light
Old
Lady - Wife or steady girlfriend of a club member.
On the
box - A top-three finish that puts a rider on the victory podium.
On the
gas - When a rider is going very fast.
On the pipe -
When a rider or bike is going very fast. This expression refers to
when a competition bike’s two-stroke engine is operating at optimum rpm.
Exhaust pipes for these
motorcycles are designed to work best at certain engine speeds. When a
motorcycle is on the pipe, it is running at the rpm that gives maximum
horse-power.
On Rails -
Expression when a motorcycle holds a corner extremely well at speed. (The
bike felt like it was on rails through that corner).
One Percenter
(1%er) - Worn by outlaw clubs. Made famous by the media that said 99%
of bikers and clubs are law bidding citizens the other 1% is not.
One-Off -
One-of-a-kind fabricated part. A product or part that is not designed to be
mass produced. It can refer to a one-of-a-kind bolt-on or a fully customized
motorcycle.
One-Oh-One -
Indian Scout
One-way SOB
- Selfish, takes but does not give in return
Open Class -
When referring to street legal sportbikes, open class designates motorcycles
with engines that displace more than 800cc in volume.
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.
OPG - Oil
Pump Drive Gear (used normally to refer to the infamous plastic oil gears in
Kawasaki Vulcans)
Organ Donor
- A biker who doesn't wear a helmet
Original owner
- This would be the first owner of the motorcycle purchased from the dealer.
Originals -
A member's first set of colors which are never to be cleaned.
Orphan Bikes
- Rare bikes that are no longer in production.
Oscar - Blue
haired
Buick driver. "Oscar almost turned left in front of me"
OTB - Over
The Bars as in a crash
Otto Cycle -
The four stroke engine is sometimes called the Otto cycle, in honor of its
inventor, Otto Benz.
Overbore -
1. To increase the diameter of the cylinder. 2. When you overbore your
engine, you drill out the cylinders and then put oversized pistons in the
holes, effectively increasing your engine capacity.
Overdrive -
Transmission gear such that one revolution of the engine produces more than
one revolution of the driveshaft. A gear ration of less than 1:1.
Overhead Cam System
- A system where the cam rides directly on top of the valve steams.
Oversquare -
Cylinder diameter (bore) greater than the stroke. Also called short stroke.
An oversquare (or Oversquaring an) engine will increase/improve torque.
Oversteer -
The situation that occurs in cornering when the rear of a
vehicle tends to skid before the front.
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