So after i bought a 1976 kz900 4 days ago that looks nice and restaured i need help with a few strange things i found
when inspecting the bike. when i rode it home it runs on 3 cyl i know it is cyl 1 because the downpipe does not get hot.It also backfired an had low power I changed all 4 sparkplus
to ngk B8es also the plugcaps 5 ohms .Then i drained the carbs from fuel that is 1 year old.Drained into a plastic jar
to see if there was any rust dirt coming out.The fuel look a litte greenbrown but it was minimal with dirt or rust coming out.I then flushed the carbs
with wd-40 and then fuel to losen up any crud that may stuck in the needlefloatseats.I will ovehaul the carb next winter so this was just a quick check
Then i checked the mixture screws they sits under the carbs on this model. all was about 2and a half out.i reset them to 1 and a quarter out since i read somwhere that is the setting.okay enogh about that.
Then used a multimeter and checked the coils first i measured the volt to the coils by put one end of multimeter into the red/yellow wire and the other to ground (i think i read about that in this forum) on the engine head the reading was 9.80v then measured the resistance on the primary and ht plugwires with the caps on .The right coil that is powering plug 1 and 4 it was 23.9 ohms the primary measured 4.8 ohms
and on the left coil to 2 and 3 plugs was 26 ohms and primary was 4,9 ohms
So to the question when i first started the work the plugwires for the left coil was connected to cyl 2 and 4 and the right was connected to 1 and 3 that must be wrong. So then i called a guy that is a kawasaki guru and he says that left coil goes to 1 and 4 and right to 2 and 3.I tried that but the bike did not start and sometimes it backfired.Then i took off the
ignitioncover to take a look at the timing and dicovered it had a electronic ignition installed. Can that be the reason for the strange wiring on the ht wires?? Anyway since it did not start and sometimes made backfire sound with the left coil to 1 and 4 and the right to 2 and 3 i switced the wiring so left coil goes to 2 and 3 and right coil goes to 1 and 4.Then it fired up and runs good . After what i have found the last days is that
left coil is suposed to go to 1 and 4 and right to 2 and 3 .but my bike is oposite. I have testridden the bike yesterday and today and it runs great with good power and no backfiring. So what is going on ? i have drawn a wire diagram how the coils is wired on my bike .Gosh this post got long sorry.
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