No compression

So I've been building this bike for about 5 months now and ran into a problem that just stumped me.
I meticulously rebuilt the top end according to all specs and procedures but now only have compression of 55/75/60/50.
The head work was done by a highly reputable machine shop as well as the bore for the bran new 1075 wiesco 10.25/1 compression piston kit. My question is... Before the pistons are broke in/ completely seated/ is it typical to have low compression? The compression test was done with carbs off. (shouldn't matter right?) Any info on what this could be would be great. Any common mistakes I could have made? Thanks

Camshaft timing. Post your year and model so the correct procedure can be posted, And go back into your user profile and add the bike info to your Signature so it comes up in each post. One of the members will have the info for you. Hopefully you haven't bent the valves, with that low but fairly even compression , i would think it is Off and probably not bent valves.

Sorry, its a 77 kz1000 LTD

see if this thread helps with the cam timing.
www.kzrider.com/forum/2-engine/445033-79-kz1000-cam-timing-help

Check valve clearance if not already done.

Sambow614 wrote: So I've been building this bike for about 5 months now and ran into a problem that just stumped me.
I meticulously rebuilt the top end according to all specs and procedures but now only have compression of 55/75/60/50.
The head work was done by a highly reputable machine shop as well as the bore for the bran new 1075 wiesco 10.25/1 compression piston kit. My question is... Before the pistons are broke in/ completely seated/ is it typical to have low compression? The compression test was done with carbs off. (shouldn't matter right?) Any info on what this could be would be great. Any common mistakes I could have made? Thanks

Start with valve lash check and make sure the cams are timed correctly.

scary thing is that if the valve timing is off, it can bend the valves so they never seal again. Hope yours didn't.

did you offset the piston ring end gaps? I just did a comp test on mine (Kz900 with Wiseco 1075 10.25 to one pistons) gives just on 200 psi on all 4 after 4000 MILES, i'd also re-test with a second gauge to ensure your gauge is working correctly.
Kt

Yes ring gaps are offset, cam timing was triple checked. I checked the compression with the cams out and just holding tension on the timing chain so as not to bind in the crank case and still the same compression. in the 50s.
I am going to check the valves again via leak test and see what the heck is going on. Thanks again

Am maybe missing something, but the valve train should be functioning when the compression test is performed.

The intake valve must open to suck in air which is thereafter compressed during the compression stroke while both valves are closed.

If the intake valve doesn't open, there's no air intake to be compressed.

Good Fortune!