Intermittent Cut Out

[Speckie Trekie]

good morning.. i have a 1998 fzs600 i have owned it since september last year.. no issues untill a few weeks ago when the speedo just randomly died (had wheel off no issues with "ears" )... so will fix that buy purchasing a new speedo unit.


secondly and this is the thing that is bugging the crap outta me is that my engine will cut out without warning at random intervals i could be a mile from the house or i could be 20 miles from the house...i coast to side of the road try to start it and nothing.. It will crank but wont start (no spark) as i tested all HT leads with a working plug against engine casing and nothing...


I have to wait up to an hour before i can start it again and even then its the same problem i have no idea how far i am going to get before it happens again... last week for example it took me almost 3 hours to do a 15 min journey.


there is no warning that it will cut out it just does it...


was thinking fuel problem at first before i tested the spark issue.. changed filter checked hoses and cleaned carbs.


So i am led to a electrical issue and i am no good with electrics don't even own a multimeter.


Bike was serviced after these issues started as i was hoping that it would solve the problem plugs were changed aswell then...


sidestand switch and kill switch all seem to be in fine condition..


any advice would be very helpfull as i am baffled by the problem as i have never had it on any of my other bikes and i dont want to pay a garage £££'s to sort it just yet when i might be able get to the problem myself.. with some help off you lovely people of course..


cheers in advance


Dave

[His Dudeness]

Is it a sudden cut out or does it splutter splutter and then cut out?

[darrsi]

Blocked breathing vent on tank?

[Speckie Trekie]

checked all pipes with compressed air and are fine..


no spluttering just cut out no warning.. i could be doing 60mph and it would die aswell as i could be doing 10mph..

[Buzz]

Does it turn over in that hour or is the starter motor/lights/horn etc. dead as well?  Should be a simple case of tracing where the voltage drops if you get a multimeter.

[Speckie Trekie]

it will turn over but wont start up....

[Fazerider]

The first thing to do, as always with dodgy electrics on bikes, is to go through the entire system checking the harness for damage and cleaning all the connectors... from the battery (and don't neglect the negative connector) via the fuse box, the big bundle of connectors in the box under the tank all the way to the ignitor box in the tail of the bike and the contacts to the coils. Clean off corrosion, tighten the female halves of connectors and spray with contact cleaner afterwards to inhibit further corrosion.
Check the wires to, and contacts of, the immobiliser bypass plugs (all black wires) on the harness at the back near the ignitor, I had a wire chafe through there and it killed the sparks very effectively.
There are other possibilities, but thorough inspection and maintenance will identify most faults of this type and it can be done without a multimeter.

[Speckie Trekie]

cheers dude.. will get on that when the weather is alot better here in sunny old stoke on trent haha.... i dont have a garage just a nice heavy duty rain cover so need rain to hold off.....


will keep you all updated....

[His Dudeness]

A sudden cut out would suggest an electrical problem to me too. You can rule out all of the starting circuit and cut off switches if the starter spins since I think the cut out switches would stop the starter spinning on the fazer. You can probably also rule out the coils and everything after them since it's unlikely that both coils would similtaneously have a problem. So the problem has to be somewhere in the wiring or connectors that are common to both coils but not the starting circuit. Have a look at the wiring diagram and see what wires and connectors effect both coils. There'll probably be a dodgy connection or wire in there somewhere.

[Speckie Trekie]

well sorry for the very extremely late reply... but after weeks of rebuilding... it turned out to be the immobilisor that was cutting out the engine... even the slightest knock on the box would cut the engine...so have removed immobilisor and fitted a new alarm system instead...


appreciate all your help on the matter guys... but i now have a new matter that needs looking into.. will post new thread lol..


Dave