help needed please

hi I have a 1983 kz750h ltd it runs but not the best there is a bit of poping going on and its not the best when cold and idle there is pods on it and someone told me to put in the right jets ? the motor is a 750e also when I check the motor I got (from left to right) 125psi 125pis 80psi 100psi the bike was in a shed for 6 years iv had it running around 10 times in the last 12 months last time was 1 month ago only road it 50meters what should I check ? any help would be great thanks

Since the compression numbers aren't good, I would start w a valve clearance check - it's something that should be done anyway, regardless. Doing the check is fairly straight forward. Changing shims is more involved but should be doable.

Since the bike has been sitting, you're probably going to have to clean the carburetors. Drain & clean the fuel tank as well and add fresh fuel. Install new fuel line & an in-line fuel filter suitable for motorcycles.

Clean & lubricate the timing advancer. Separate the rotor from the advancer body to clean it thoroughly & fill the groove w grease.

Redo the spark plug wire connections. The wires untwist from the coils. Unscrew the ribbed compression boots, then the wires if they don't come off w the boots. You may need to nip off the ends of the spark plug wires a tad. Or go ahead & install a new spark plug wire set.

The coils are old, so they may need replacing. Z1Enterprises.com has Dyna coils & spark plug wire sets.

sweet thanks mate il get starting on it if there is any more info please post

If you have the stock airbox, put it back on, then decide later whether or not to use pod filters.
CV carburetors are known to be difficult to tune for the pods; but someone else may be able to tell you exactly what you need to do for the pods.

This should be a good link to a pdf service manual to get you going. the valve adjustment will need the cams removed. The shims are under the follower/ bucket and are 13mm. Shims are available as well as gaskets from several suppliers. But z1enterprises.com should have them in stock and will ship globally.
mbsween.bike-night.com/kz750l3/media/GPz750-full.pdf

the pods were already on it I have a work shop manual I have 2 kz750/4 1 is a hard tail its off getting painted im hopping to get the motor running good so I can put this motor in the hard tail il have a good read of the book thanks

I got the bike going today but still got 1 reading 80psi have not checked the valves yet but when on idle I have a rattle don't no if its the chain or clutch how could I tell what 1 it could be ? thanks