do you mean you put the #1 piston at TDC with a piston stop on then look to see if the timng mark is lined up correctly.
how to make a piston stop
take a spark plug and bust the ground electrode off. drill the insulator out. tap the hole. cut the head off a bolt. round off the bolt with a grinder. you want about a 1/2" of the bolt sticking out of the plug. or what ever it takes so the piston will hit the bolt
make sure the piston is down far enough so that when you screw the piston stop in you don't hit the piston
turn engine over with a socket on the balancer bolt until the piston hits the bolt. mark you balancer. turn the other direction until the piston hits the bolt. mark the balancer. half way between the marks will be your TDC mark. if your mark is not there your balancer has spun.
