I need to replace my clutch cover gasket,it's an '86 650,on the frame, it say's the bike is a NP41A,all I can find on ebay is for NP41B. My question is...is there a differance? Going to get a price from the stealership and I know that I'll have an in depth discussion ( as with every part I've bought from them for it ) and still walk off saying my butt knows more than them   so before I go in and look like a prat,I'd like to know  

Maybe they didn't have the preapplied stickum on the early gasket?
I wonder if both gasket numbers are available. I'd be happier if the old number is not available, But, if it is, I'd wanna talk to someone who has both and ask them to see if they can see a difference.