June 29, 2012 Electrical Connections Separated and Cleaned Fuel Rail Painted

I've spent the past couple of days cleaning the bike electricals and all under and around the airbox. I also pulled the fuel rail and stripped it. I didn't take it down to bare metal. There were some rough spots that looked like a solvent had gotten on it so I took it down to smooth. I bought some Krylon engine primer and black engine paint. I put two coats of primer and three coats of paint on it.

I checked out how to clean injectors. Most of the help came from you tube. The first gadget would do the cleaning while the injectors were still on the car. The second video, the guy had built his own gadget but pulled the injectors to do the cleaning. It was a great video he had a link that showed how he built his tool and then how he built the electrical side, which is what I'm going to do.

For the most part all the systems use a pressure system to shoot cleaner through the injector. The electrical side is a simple momentary switch that opens and closes the solenoid; or actually it triggers the solenoid which opens and closes the valve inside the injector.


To build the electrical side you need a switch, a battery, and optimally the female side of the connector. I got my connector from Ed Coby my friend who owns a car shop. The pressure side is simply accomplished by setting up an air tight connection between the injector and the can of cleaner. I'm going to use a syringe some hose and probably some hot glue, I'll have pictures

I have endless videos of the electrical separation which would bore even the most ardent beemer fanatic. They are mostly for me so that I know how everything goes back together. Getting the plugs back together isn't really a problem since they are keyed and most connectors on the right side of the bike won't reach the left side. However, it is my intention to strip the bike down and paint the frame and restore the engine components that will mean removing the wiring harness'. That of course is a job for another day, most likely during the cold winter months. I got a pack of multi colored electrical tape from Harbor Freight Tools. I've striped the connectors so that it should be fairly easy.

Electics Under the Tank

The Schematic from "K100 Troubleshooting"









At first I saw this as the front of the bike being up, which is the way I think, it's not the front is down. I suppose the maker/publisher of the diagram is an engineer and that's the way they or he thinks.

I made a few changes and they are not fully finished. Because I was doing video as I went along. I flipped the diagram and had to ad a new legend. I still need to do new circles with numbers.