OEM
OEM is an abbreviation for Original Equipment (of the) Manufacturer. In motorcycle lingo the term is often thrown around when discussing replacement parts. It would be perfectly reasonable for your local Yamaha dealer to recommend that you use only OEM parts on the Yamaha motorcycle he just sold you. Meaning he wants you to buy [...]
Read More...Oxygenated Gasoline
Reformulated gasoline that is sold in some parts of the world where ozone levels are excessively high. Contains one of four oxygenates, methyl tertiary butyl ether (MTBE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), or ethanol. Oxygenated gasoline is blamed for a lot of problems related to jetting, deterioration of fuel system [...]
Read More...O-ring Chain
An O-ring chain is fitted with special O-rings that help keep dirt and water from entering the chain while at the same time seals in a permanent lubrication between the rollers and pins. Often used as the final drive on off-road motorcycles and sport bikes. Some O-ring chains use O-rings that are X shaped in [...]
Read More...Ohmmeter
The setting of a multimeter that allows you to test the resistance of a component, measured in Ohms of resistance. Motorcycle Service Manuals usually give specifications for the resistance of some of the electrical components found on the vehicle.
Read More...Oil Pressure Warning Light
A few four stroke motorcycles and ATVs are fitted with oil pressure gauges that display the exact oil pressure while the engine is running, but not many. Most four stroke motorcycles and ATVs are fitted with a simple light (almost always red) on the instrument cluster that comes on when there is insufficient oil pressure. [...]
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