Bushing Naraku 24x18x14mm TGB crankshaft

Woodruff Key

What is the Function of a woodruff key?

A woodruff key is a semi-circular key that due to its shape is often called half-moon key. It sits on the crankshaft shaft, which has a recess to accept this small key, and drives the ignition rotor, which also has a recess for it.

In short, the ignition wedge provides the connection between the crankshaft and the ignition so that both work in unison.

Woodruff keys are very small, but absolutely essential to produce a spark every time the crankshaft rotates.

Offset keys

The woodruff key is factory seated on both the crankshaft and in the rotor at a specific point so as not to interfere with ignition timing and thus engine behavior.

Shifting the rotor relative to the stator by a few tenths of a millimeter shifts the ignition timing. An offset woodruff key can be used to advance ignition timing to achieve more power at high RPM.

Tuning Level: Original

We categorize our products into different performance levels  Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.

Under Original you will find parts whose performance and technical specifications are identical to those of the stock part.