| ABBREVIATIONS and SYMBOLS Across flats (bolt size)...........................................AF After Bottom Dead Center.....................................ABDC After Top Dead Center..........................................ATDC Alternating current................................................AC Ampere..................................................................Amp Ampere-hour..........................................................Amp hr Atmospheres...........................................................Atm Before Bottom Dead Center....................................BBDC Before Top Dead Center.........................................BTDC Bottom Dead Center...............................................BDC Brake mean effective pressure................................BMEP Brake horsepower..................................................BHP British Standard (tread pitch).................................BS Carbon Monoxide...................................................co Centimeter..............................................................cm Degree (angle or temp)...........................................Deg or "o" Diameter.................................................................dia Direct current.........................................................DC Double Overhead Camshaft....................................DOHC Ducati.....................................................................Duc Energy Transfer......................................................ET Fahrenheit...............................................................f Feet.........................................................................ft Feet per minute.......................................................ft/min Fifth.......................................................................5th Figure (illustration or photo)...................................Fig. First........................................................................1st Fourth.....................................................................4th Gallons (US)...........................................................Gal. High Compression...................................................HC High Tension (plug wire).........................................HT Internal Diameter.....................................................ID Inches......................................................................in. or “ Italy.........................................................................Ita Low Compression....................................................LC Maximum................................................................Max Millimeter...............................................................mm Miles per hour.........................................................mph Minimum................................................................Min Narrowcase..............................................................NC Ohms......................................................................ohm Outside Diameter....................................................OD Overhead Camshaft.................................................OHC Part Number............................................................Part # Ratio........................................................................ : Revolution Per Minute............................................RPM Second....................................................................2nd Third.......................................................................3rd Top Dead Center.....................................................TDC Triumph..................................................................Tri Twin Carbs.............................................................TC United Kingdom......................................................UK Volts........................................................................V Watts.......................................................................W West Coast British Racing.......................................WCBR Widecase..................................................................WC |
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