Brand new never been used.Never started an engine bought from c m n s l
It fits the late 70s and early 80s honda single cylinder engine as fitted to xl 250 xr250 & cb250rs and supposedly some variants in the 500cc capacity but I've never come across one myself
Obsolete NLA rare don't buy the Chinese copy and rip your ankle to bits like I did years ago when the cheap nasty ones shear off.
RECAP - SMALLER SPLINE TYPE