Just looking through my exhaust ports with the upper zorst manifold off I saw Piston 1's valves (right-most side of the engine) were in the open position but all the others are closed. Is this normal? is there a point where only 2x zorst valves are open at anyone time? and if it isnt normal then what shoul I do to correct it ?

Oh an its a H22a OBD1

 

Supposed to be that way... Rotate the crank (forwards only...) You'll see #3 valves open when #1 close, then #4 then #2... Only one cylinder is in the exhaust stroke at a time.

 

Yeah man, firing order is 1-3-4-2 and since our motors are 4 stage (intake, compression, ignition, exhaust expulsion), no two cylinders are in the same stage at the same time.

If you want to see what it looks like animated, goto the link in my signature and look at the last page for my latest animation that shows how the valve train operates.


Hope that helps.

 

Phew, I was thinking that two sets should be open at any one time Cheers.

Its been sitting in the garagea couple of months now, finished installing the cradle, suispension all torqued up to spec so just gotta get it aligned and its back on the road.