I've finally got hold of a head for my cb off a newer Chinese bike with a snapped crank, head and cam are in good condition but the newer engine has a completely different timing chain, had a look on eBay and a few sites and can't find a cam gear for a cb125 but there are plenty for cb350, 400, 500 etc... so does anyone know if Honda used the same cam gear through the whole cb range? pics of the gear and chain bellow