try minek.com
Yes you can use 87 octane unleaded in a 1977 Yamaha XS750, that fuel was the good octane in those days
2.0l
Google it before you ask a question. Is 40 MPG
it 750cc well actually 748 but whats the diff
it all depends on what you are looking for. most parts will but no motor parts will.
The XS750 is an inline 3 cylinder bike, that is the cylinders are all in a line, brought out in two guises, a custom the XS750se and the standard XS750 The XV750 is a 2 cylinder V engine, their are 2 cylinders, one behind the other in a v configuration, used to minimise width of the bike
The temperature of the spark plug's firing end must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called "Thermal Performance", and is determined by the heat range selected. The heat range has nothing to do with the amount of voltage going through the plug. Also plugs remove heat from the combustion chamber not add it.1977-83 Yamahas used the NGK B-8ES or BP7ES gapped at about 0.6 - 0.7 millimetres or 0.024 - 0.028 inches .So your heat range equals a 7 or 8 eaqual a "colder" or cooler plug.A cold spark plug has a shorter insulator nose and absorbs more combustion chamber heat. This heat travels a shorter distance, and allows the plug to operate at a lower internal temperature. A colder heat range is necessary when the engine is modified for performance, subjected to heavy loads, or is run at a high rpm for a significant period of time. Colder spark plugs remove heat quicker, reducing the chance of pre-ignition/detonation.