Strange Ignition Problem!

[Jizzmeister]

Hi guys, if anyone can shed some light on this problem I would be very grateful.

I own an FZR 400 genesis (1986) with approximately 60,000km on the clock. About a month ago I noticed the odd backfire sound perhaps once everytime I took it out, and over time it got more and more frequent.

Suddenly last week the engine started sounding terrible somewhat like a lawnmower or old single/twin cylinder bike. I stopped riding it but have failed to find the problem. Only the exhausts for cylinders 2 & 3 were getting hot.

I have checked the resistance of the primary and secondary coils in BOTH coilpacks, they were found to be the same and within manufacturers specs. I had checked sparkplugs and they looked fine. I took out the first and the four spark plug leads and connected them to plugs and could see no sparks when turning over the engine with the starter motor.

Finally I bought a 2nd hand CDI with the same serial etc fitted it and the situation was no different, finally i swapped over the 'low tension' connectors to each coilpack and the bike would not start at all .

Could it possibly be one of the 2 relays wired in with the CDI?? or is it more likely to be the coilpacks? (i have another one for cylinders 1 &4 due in the post.

Many thanks in advance!

[Evilchicken0]

because it's on 1+4 Changing the coils would seem like the most obvious thing.

While you wait for the coil you could clean the carbs and renew the filter to be certain.

One other thing - have a look at the wires for the side stand cut out and bridge them awhere they join the loom. I don't think it's that but it's just something to check.

[Q007]

because it's on 1+4 Changing the coils would seem like the most obvious thing.

While you wait for the coil you could clean the carbs and renew the filter to be certain.

One other thing - have a look at the wires for the side stand cut out and bridge them awhere they join the loom. I don't think it's that but it's just something to check.

The 1986 genesis model doesn't have a side stand switch or at least the grey import model doesn't.
Trust me I know coz I'm a bugger for pulling away n hearing a grinding noise as i have to turn left outta my drive..lol.

[Q007]

Hi guys, if anyone can shed some light on this problem I would be very grateful.

I own an FZR 400 genesis (1986) with approximately 60,000km on the clock. About a month ago I noticed the odd backfire sound perhaps once everytime I took it out, and over time it got more and more frequent.

Suddenly last week the engine started sounding terrible somewhat like a lawnmower or old single/twin cylinder bike. I stopped riding it but have failed to find the problem. Only the exhausts for cylinders 2 & 3 were getting hot.

I have checked the resistance of the primary and secondary coils in BOTH coilpacks, they were found to be the same and within manufacturers specs. I had checked sparkplugs and they looked fine. I took out the first and the four spark plug leads and connected them to plugs and could see no sparks when turning over the engine with the starter motor.

Finally I bought a 2nd hand CDI with the same serial etc fitted it and the situation was no different, finally i swapped over the 'low tension' connectors to each coilpack and the bike would not start at all .

Could it possibly be one of the 2 relays wired in with the CDI?? or is it more likely to be the coilpacks? (i have another one for cylinders 1 &4 due in the post.

Many thanks in advance!

Could be just that the coilpack for 1 & 4 isn't getting power to it, take off the 2 spade connectors on the coil and check the voltage there. that's if the relays check out to be o.k. a chaffe in the wire could be causing the problem as you did describe it got progressively worse over time.