I'm trying to put my engine sprocket back on, but the key is not going back in the shaft. Are they usually a super tight fit? Tried freezing it to see if it would shrink, but it didn't work. Was thinking about filing a small chamfer on the edge of the keyway- would this hurt anything? Any other ideas?
Also how close does the back of the engine sprocket get to the oil seal?
Also how close does the back of the engine sprocket get to the oil seal?