When discussing motorbike and bicycle steering geometry at the same time, be very careful when using the word 'rake' - in motorcycles, this refers to the steering axis angle, whereas in bicycles the same term normally refers to the fork offset, which is a completely independent aspect of steering geometry. This is explained further at
Wikipedia. Confusion has already started above, with someone referring to a "very steep rake" on a bicycle, which only makes sense when using the motorbike definition of rake.