no parts for the werks b2, and NO the b6 parts won't interchange. I know this because I pulled the back plate off and my piston dropped down breaking the piston skirt. Ron said they wouldn't interchange I was going to just buy a b6 piston and sleeve set but they won't work. what I did find out is that a used piston from my Cody King Orion engine worked it has been in my b2 for 2 gallons now and it still runs like a champ. It is a cheap engine and the parts would almost be as much or more than a new that is why they don't offer the parts, but you can get your original piston and sleeve pinched if need be.