Engine kit fits all years and variations YAMAHA TX500 (1973-74) XS500 (1975-1978)
all socket allen bolts are used for ease of assembly. these are hand polished, knurls removed.
These are highly polished stainless fasteners, not just a bag of bolts, comes with instructions, and sorted.

kit includes: yamaha  TX500/XS500 a:left crankcase covers 16 pieces b:clutch cover 15 pieces c:cylinder head cover 22 pieces d:intake manifolds 8 pieces e:oilpan 11 pieces 72 pieces total

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