I was given a 73' Keystone with the 49cc Tas 2 stroke. It was missing the rod that goes thru the drive shaft to activate the clutch. I had it running last fall using some 3/16 rod, but would like to make up something close to the original. If any one has access to this part I really would appreciate any info you could share. The chain also was missing , and a local motorcycle shop sold some they thought was correct , but the short amount of time I ran it, it already shows "new" wear marks on the bottom of the drive sprocket, it's like the spacing it right, but the depth is wrong? I can't remember the # of the chain they sold me, but it has 415h on it. What did these come with when new?