Engine kit fits XT500/TT500 1976 and up.
this kit is all socket allen. with no knurls.  All bolts are hand polished.
These are highly polished stainless fasteners, not just a bag of bolts, comes with instructions, and sorted. specifically designed to fit XT500/TT500

kit includes: engine YAMAHA XT/TT 500 A::crankcase halves 14 pieces B:points cover 2 pieces C:oil filter cover 2 pieces (bottom bolt is yamaha specific and not included) D:right crankcase cover 10 pieces E:flywheel cover 5 pieces F:sprocket cover  4 pieces G:cylinder 4 pieces H:cylinder head (plain hexnuts for head stud nuts - not like original) 17 pieces 47 pieces total

here's a pic of another kit we do - so you can see the quality/finish