My new S1 is using a lot of oil but it aint leaking tho?!

It smokes a lot so I didnt a compressin test, apparently
if it creates compression then drops the rings have gone
but if it doesnt create any compression at all the valves
aint sitting right, which is the case with mine. Only got
123psi on cylinder1, the rest dont hold any

So the heads off this weekend for new seals, gaskets and
tappets, and re-seating the valves!!

Anyone know what the compression should be?