Help finding the problem

Alright guys I finally decided to get some personalized help before before the sledgehammer looks any nicer.I got a completely stock,nonrunning KZ750 H LTD -idk the year- that sat for 25 years in mediocre conditions.From the start the carbs (Keihin CV34) have been a pain -take them off,fix problem,put them on,new F#%*ing problem,take back off- ,and replacing the Ignition Coils.

Now after everything it will finally start with very little effort ,but which cylinders fire is a crap shoot.#1 will only fire immediately after cleaning the carbs any other time and the exhaust won't even get warm -plug looks almost white-.#2 and #3 seem to be doing alright albeit #3 runs quite a bit hotter than the others -#2's plug is a nice tan while #3 is slightly darker tan-.#4 usually fires although not as good as #2,#3 -plug is black and sooty so-.

Sorry if this a mess,missing info ,but if anything is needed just ask.I'm just so f#%&ing of these carbs and hurting my novice mechanic brain :lol: .Thanks for any help.

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Good Fortune!

Good Fortune!

Once carbs are cleaned, should never allow any fuel into the carbs unless the fuel first goes through an aftermarket in-line filter.

Otherwise, the carbs are immediately re-contaminated and again need cleaning.

A popular type of in-line filter:


Good Fortune!