Just got the bike running good. I have been riding it great till the other day. When to start no spark. ran fine the day be for. I am getting power to the coils. ignition pulse generator resistance tested at 489. The volts out of it is 0.1 But that is not peak volts i do not have the tools to do that. The bike is a 88 with a 94 motor and wiring. Any ideas on where to go now? hate to buy the ignition pulse generator and it be the ECU COMPUTER BOX!!!!

 

The resistance is within Spec ( 460 - 580 ohms ) so the pulser is not bad

I'd go over how it is wired up in great detail at the ecm connector - somethings off

 

looks to be getting power at all the points it should be at the ecm.... I dont get it first time i ever had a bike run great one day then just not start the next. maybe there is some thing wrong with the ecm and i cant find a way to test it !

 

Since you have a voltmeter and know how to use it, how about checking all the things that can disrupt the ignition? I would check the kickstand interlock switch first. Maybe the clutch lever safety switch and emergency stop switch next.

 

checked those no luck just went out and rechecked ever thing nothing.. once again all i can think is its the ecm. That is not a cheap part to just buy and see if it fix my problem!

 

88 no kickstand switch

I doubt it's the ecm man - hold off getting impulsive.

Right side of crankcase is(clutch side) the neutral wire coming out of the
crankcase follow it and see how this was wired into the 88


Here parts 8, 9 (appears like they are left side in diag)

but look close they're right side

 

NEUTRAL light does work ! bike turns over fine. also at the coil on the hot side with the kill switch on i am getting 11.98 volts. but at the starter solenoid i am get 12.49 volts. Also when i when to start the bike the other day when i found out it would not start i saw the 15 amp fuse blown. I replaced it and checked all other fuses!

 

well it should be a 20amp min - hmmmm - somethings grounding somewhere imo
tough one

did it get rained on or anything ? moisture in the controls or ign switch
wild guesses here

 

really i am stumped !!! I have been out there 5 times today with my multimeter and i cant find any thing. It did not get wet i keep it inside. Just the other night i was driving it fine for about 30 miles now nothing..... It's crazy!

 

I am getting power to the coils

But no spark at plugs, correct ?
Possibly dodgy ground wiring to the coils ?

Check in a different direction
Fuel to the carbs ?
Petcock filter blockage
Vacuum line disconnected
Tank breather blocked