Eastern Bikes Half-link 1/2 x 1/8-inch Silver BMX Chain
If so - then it's a 1/2 x 1/8-inch size/pitch? I'm not runnin' a jackshaft (I wish lol) so this would be for the engine sprocket to rear drive sprocket, supplied with the kit.
If indeed that's the size/pitch, Thanks a million man! Tho I might go to my local bike shop and see what they've got...
I suppose I could bring a section of chain to match spacing lol - but I always
seem to forget o_O