BSP. 109 head .280, low tension rings, Cl1i cam .000 lash both sides, .009 head gasket, piston .010 in the hole, throttle shaft twisted .125 past square to bore, .038 main - .028 low, 2hole preped e-tube, increase air on air bleed, low feed 2-3/4 turns out, arc flywheel 38 deg.