150cc Timing Chain Crankshaft Sprocket

[GrouchyOle'Man]

Hi Roscoe, I did not intend on changing the gear. I wished to know WHICH gear on the crank the cam timing chain rides on. I know the camshaft gear and Upper chain guide LINE UP with the outside crankshaft gear on MY engine and have seen plenty of crankshaft views (with no chain on).... But, another enthusiast stated the chain goes on the inside gear, not the outside one. I am fighting a constant miss and backfire with this engine. It has new rings and has about 150psi compression. I think the previous owner may have put new rings in it as well. The cylinder was honed also. I ringed it because it seemed to be pushing a LOT of oil up into the head although oddly, it was not smoking....but now it is.
Thanks for the link.