Hey guys. Have a 2000 F4, and Ive replaced the CDI box, ignition coils, and put all new spark plugs in it, and It still wont spark. Checked the sub harness wiring and its working fine. Im stuck on what could possibly be the issue. Please help! Wanna get it running asap. Thanks!

 

how do you test the spark ?
do you hit the starter with the plug out ?

I am no expert at the electronics, but start with the 2 things you didn't mention, the ignition fuse and and ignition pulse generator.
the fuse is the simpler one to start with.

another question is what is the battery condition. if it has enough juice to turn the starter then it's fine. if not it might also not generate the voltage for the spark plugs.

after this you need some one who knows

p.s.: but I also attached the trouble shooting from the (service) manual.

 

Do what Avi said. Also, maybe its not a spark issue. How long has the bike been sitting? If you haven't already, invest in a Chiltons manual because it will have the electrical schematics.

 

The bike has been sitting about 5 months, maybe 6... The battery is weak, however, I have had it hooked up to a running vehicle every time I Have tried to get spark. As for Ignition Pulse Generator, I have not changed, nor checked it, but I have checked the Sub harness wires going to the coils itself, good voltage. I will try to see about checking the rest of the harness, and the Pulse Generator, I am going to order soon. Thanks for response. =) Ill be back to let you know more after fixing those issue. ^_^

 

careful jump starting your bike with a running car, a cars alternator puts out way more amps that your electrical system can handle and you will burn stuff out.

 

very true. don't start the car.
if you are worried about killing the car battery , start it every now and then when it's not connected to the bike.

 

do these bikes have the tip sensor like the newers one have? If so check that they are usually located on the steering stem.