Honda issued two Service Bulletins on the HS35, way back in the late 80s.
One was for a leaking oil filler pipe; some units left the factory with out sealant. Unless you have oil leaking from around the base of the filler pipe, no issue. If you do, remove the filler pipe, clean and inspect for any burrs, and apply a little silicone sealer to the threads...
The second was for an improved design scraper bar that works better than the OEM design. The new scraper bar is Honda Part Number 75201-730-010, and has a list price of $21.10. Google the part number to find a Honda Dealer selling it online, or use this link to find a Honda Dealer in your area:
Find A Honda Dealer
If you'd like copies of the bulletins, drop me a PM with your email and I'll send 'em to you.