Oil leak at crankshaft behind starter clutch

Can this seal be replaced without splitting the engine open? Hoping I can just pull off the starter clutch (maybe called a dynamo?)and gear and replace the seal. 1975 kz400

I dont know what bike you are referring to, but im going to assure youre talking about a 1975 kz400 based on your previous posts. Im pretty sure that there is supposed to be a bit of oil behind the alternator cover to lubricate the starter clutch. Are you sure that the seal is leaking? 

This area is supposed to be dry. No oil passage or return. 
1975 kz400

spyshot wrote:

This area is supposed to be dry. No oil passage or return. 
1975 kz400

 

This has been brought up on the forum previously here .

Here is an oil routing diagram. See how an arrow points into the left cover area.  
I just dont want you wasting your money and time.