Offset flywheel woodruff key allows a + or -2 degree overall timing adjustment by re-positioning the location of the flywheel on the crankshaft. Increasing the ignition timing can increase low-end power on stock to mildly modified engines. While some highly modified engines with high performance CDI's may actually benefit from retarding the timing by 2 degree allow the engine to turn more rpm.
These are discontinued and we only have available what is shown above. This is the only size we have left.