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bike stalls when warmed up. ecu looks bad ?

4K views 11 replies 5 participants last post by  riverszzr  
#1 · (Edited)
Hi, Long time reader but this is my first post. Anyhow the last say two months my 1995 zx6r f1 has been playing up. It starts fine with a little choke and idles perfectly and takes off normally and pulls hard thru every gear in and out of traffic. Last week I changed the four spark plugs with brand new ones, new kawasaki air filter ( not k and n ) and pulled apart and cleaned the carbs. Also installed brand new kawasaki oem fuel pump and fuel lines. None are kinked. The bike runs like a absolute beast after doing all this BUT after about twenty minutes or more or less the bike loses power and quickly dies. When this started to first happen I could quickly restart it and off id go. The last few days its been harder and harder to restart and I had to push it to the nearest shops today as I cant restart it. Going back later to see how it goes. The day I cleaned the carbs etc I noticed the ecu ( is that it ? ) looks a bit shabby. The front/top looks fine but the underside looks bubbly like its been red hot and melted abit. It doesnt look right. Actually looks like little white pebbles in it. Could this be causing the problems ? Thanks guys any feedback would be heaven sent. I uploaded a photo of it not sure if it worked ???? Also I forgot to add that i have a brand new top of the line battery.
 

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#7 ·
19 year old coils probably mean 19 year old spark plug wires as well.... and 19 years of corrosion on electrical contacts. Old bikes and electrical issues go hand in hand. not a bad place to start, the coils.... but I'd want to eliminate as many future issues as possible.

Taking it to a shop to make it right could be very expensive. If you can reduce the number of potential problems before you have to take it in, you will be money ahead in the long run.

Pull every single electrical connection apart, and inspect for corrosion... usually it's going to be powdery white, or blue/green powder, or simply really black cruddy looking contacts. When you clean up the connections, so you know you have bright shiny metallic contact, add a bit of dielectric grease to keep moisture from repeating the issue in the future.

New wires, new plugs, new battery, fresh oil, fresh air and oil filters, fuel filter, service the fork.... all stuff you can do on your dime for less than a shop will charge.
 
#8 ·
Hey thanks for the reply. The spark plugs wernt too bad but I changed them anyhow. Yes the wiring seems to be an issue. It looks messy in there and im scared to mess things up. I'll have a look and see how things go. My mrs is getting the shits with me working on it as i spent all weekend just gone mucking with it. She needs my manly loving hahaha ( jokes ) If I fail i'll still take it to the shop. Might have to leave it there till I pay them depending on cost. They charge 80 dollars an hour labour here in australia. I must admit i had my 250 ninja serviced there and it never missed a beat.
 
#12 ·
Fuel tank Vent tube pinched or blocked? Fuel filter plugged? Fuel pump pumping enough? Petcock restricted? Rust in the tank---was there anything in the carbs when you cleaned them?
If you really don't know the service history of the bike then it is a very good idea to get the valves adjusted etc...it is a 7500 mile interval thing on those f models- carb sync etc would also be included in that tune up procedure. Be as good of place as any to start-
but yes it would also be well worth your efforts to pull apart the switch clusters and clean them-all the electrical plug in connectors and all ?3? ground wires--1 on the engine, two on the frame just to make sure verything is clean and making good contact. They can become corroded or loose or dirty etc...