only firing on two cylinders maybe?

i have a 83 kz550 ltd i got everything fixed up and took it for the first ride and when i got done two cylinders were warm but not near as hot as the other two im not sure of what actual cylinder the numbers are but if i start from the one closest to the clutch lever as number one and go in a line it would be 1 & 3 that not heating all the way i got new plugs i have big blue spark i have fuel and air my compression is 150 on all 4 so im unsure what else it could be i need help asap i have to finish the bike before i get shipped for boot camp

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Sometimes it helps by removing the sparkplug caps,cutting 1/4" off the sparkplug wires and re-installing the caps.

I believe the caps should have 5K of resistance when tested with a multimeter. New ones are available at www.z1enterprises.com and I'd imagine at the motorcycle shops.

i cant fit my spark plug wires from 1 to 4 i have two coils and each two wires are on the closest cylinder is that the problem?

bvaleri wrote:

i cant fit my spark plug wires from 1 to 4 i have two coils and each two wires are on the closest cylinder is that the problem?

YES.

Cylinders 1-4 on one coil, cylinder 2-3 on the other. If the bike wont start after, or backfires, you've got them backwards. Just switch the 1-2 wires, then the 3-4 wires.

Note the image: how the wires go from the coils... Good luck.

bvaleri wrote:

...83 kz550...cylinders...1 & 3 that not heating...new plugs...big blue spark...fuel and air...compression is 150 on all 4...unsure what else it could be....

What do #1 and #3 spark plugs look like? Real sooty? Clean as new? Or other?

Plug reading might help diagnose a possible carb issue such as for instance too high fuel level inside float bowls.

Good Fortune!

Same for pick-up modules as for points.

Good Fortune!

got it hooked right and 1 and 4 wont fire now but 2 and 3 are 3 wasnt before

bvaleri wrote:

got it hooked right and 1 and 4 wont fire now but 2 and 3 are 3 wasnt before

Sorry, but are you sure that the wires coming out of one coil are going to the outside two cylinders? And the other coil has wires going to inside cylinders?

Just double checkin... cause you may have a dead coil, bad plug wire, bad spark plug, bad wiring to coil, bad ignitghter (if applicable), bad pickups and/or condensors...
More to check!

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ok so i cut back the plug wires and now 2 3 4 work but number 1 is barely getting spark so i need a number 1 wire