nice one bud, what do the balancer shafts do? make the engine smoother i guess?
when you rebuild can you get a few pics of the cam chain assembly etc please.
mine makes a slight rattle and im not sure if its the chain running over a guide etc as it seems to be from inside the engine, i did think it was a pulley but now not so sure and i have not heard another ST to compare it to.
keep up the good work