bad coil? whats next?

took the bike home tonight started it only running on one cylinder still...and then about 30 secs later as i was comming out of the parking lot it started on running on 2 cylinders again and ran amazing. :blink:

Intermittent problems are the worst. You really don't want that cylinder to cut out when you're passing a semi or at full lean in a turn.

If your bike has the Kawasaki electronic ignition, it might be suffering pick up(pulsing) coil problem:

Ohm Checking Pickup(Pulsing) Coils

The pickup coils on the Kawasaki’s with the factory supplied electronic ignition can sometimes fail or become intermittent due to heat and vibration.

1.Trace back from where the pick up coils are mounted,(under a right side CD sized cover) locate and disconnect a small 4 pin connector. Using a multi-meter set on OHMS and range of 2K, check between the BLUE and BLACK wires(#1 and #4 sparkplug wires) for between 360- 540 OHMS.

2.For #2 and #3 sparkplugs the wire colors will be YELLOW and RED, again 360-540 OHMS. The 550’s,650’s & 750’s may be backwards to the Z1’s,Kz900’s,Kz1000’s & Kz1100’s.

3.If the pickup coils are suspect of failing due to heat, they can be stressed using a hair dryer without the need of the engine running.

4.A replacement set of pickup coils might be obtained from a dealer who serviced the police Kawasaki’s.

5. If replacement pickup coils are not available, your next choice would be to order a Dyna “S” electronic ignition system from www.z1enterprises.com It replaces the IC igniter with a smaller module located where the mechanical ignition advancer was mounted.

6. Checking with Kawasaki.com website has determined that the Pick up(pulsing) coils are available . The pulsing coil # is 59026-1133 and replaces the older # 1002, 1012 which were used from the MKII motors until the 2005 P24.

7.Check the small 4 pin connector that the pickup coils connect to for corrosion/loose pins too.

If you have points,it could be a failing capacitor(condensor) in the ignition system.

im a super noob so none of that makes sense to me at all.. i have a twin so i only have two spark plugs

Does your bike have electronic ignition? If so, the pick up coil maybe affected by heat.If you have points,the condensor(capacitor) may be failing.

from what ive read no it doesnt have electronic ignition
kz750twins.com/?p=92

Do you know how old the plugs are? If not i'd go ahead and replace them. Shouldn't cost you more than $6 per plug and it's got a better than fair chance of fixing the problem. Just set the gap on the plug to. 7-.8mm. If you don't have a gap gauge they're cheap too.

For the plug caps, you can test them with a multimeter set to measure ohms. You should get a reading of 5k ohms.

With an intermittent problem like this it's going to be hard to track down.

If you decide to replace the plug caps, just take what's on the bike to your local mc dealer's parts counter. They'll probably have something for you. Should be in the $10 range for 2 of them.

So for less than $20 I think you'd have a better than 50% chance of fixing this.

so the caps them selves come off? if so do they just unscrew? i tired for a few min while i was on brake at work to take them off but couldnt them off

newowner79kz750b1 wrote: so the caps them selves come off? if so do they just unscrew? i tired for a few min while i was on brake at work to take them off but couldnt them off

Yeah, they should just pull off the end of the wire. Disconnect the wire from the plug. Then pull the end cap off the wire.

You should end up with an end cap that looks something like this:

ill try that tonight when i get off of work. maybe if i just try to replace the cap it will solve my problem? im hoping atleast.

one more question. what type of cap i replace it with. ive searched online for like a good hour and cant find anything specific for a kz750b.

i did find the resistor caps on z1 but i thought it wasent good to get resistor caps

If you don't have resistor wires you CAN run resistor caps. If you DO have resistor wires than do not run them. Do you have points or do you have electronic ignition? If you have hard caps on the wires than they are screwed on with something like a sheet metal screw on the inside of the cap. The cap would than Un-Twist from the wire.