The connecting rods of the opposing pistons engage a common crankpin, resulting in alternating firing intervals of 54 and 90 degrees. (ausmotive.com)
Most V - twin engines have a single crankpin, which is shared by both connecting rods. (en.wikipedia.org)
Further extensive lightweight design measures have resulted in such features as titanium connecting rods, thin - wall, low - pressure casting on the crank case and the cylinder heads, a high - strength, lightweight steel crankshaft with 180 degrees crankpin offset and the extremely thin - walled alloy steel / nickel exhaust system. (greencarcongress.com)