SOHC.co.uk Forums > CB750

help!

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steff750:
it could well be one of your coils has died (swop coils to check)or one of your set pionts are shorting on them cylinders(swap points feeds blue and yellow wires i think) check your points again that they are not shorting around the carbon washers that could be the problem or even swap condensors

muttblbc:
swapped the coil wires (blue yellow), wont start and back fires....

Seamus:
Take the plugs out, clean and dry them, then try to start it again. If the electrics are failing on 1 and 4, then those pots are probably flooded. Changing the points wires should get it to run on 1 and 4 if the points are the problem. If not, suspect the coils.

muttblbc:
swapped condensors, no change. checked for spark and its got a nice blue healthy one to all 4,  its funny its about 40 degrees out and the bike was dead cold but fired up at the first hit of the button, idles nice and smooth on only 2 cylinders. hit all 4 pipes with temp gun 1&4 are in the low 200s 2&3 400s pretty quick. pull the plug leads for 1&4 and theres no change in the idle. compression, spark, that only leaves fuel right? ??? >:(

muttblbc:
gotta be the carbs, pulled the vaccum screw sprayed some starter fluid over the port and the rpms spiked. gottem apart and back in the ultrasonic right now

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