The big end journal for a twin has two oil holes drilled along it into an annular groove which is filled with oil from the mainshaft. The oil then is fed to each big end.
Where should these holes be positioned (say by clock figures) with respect to the position of the crank at top dead centre when the crankshaft is assembled please - or does it really matter?
Where should these holes be positioned (say by clock figures) with respect to the position of the crank at top dead centre when the crankshaft is assembled please - or does it really matter?