So fixed my k75 today, 65f Chicago loving this. as I was directed to check my ground wires. first under the tank five ground wires cleaned and tried to tighten the bolt, but it had striped threads ooh just thought might not be the bolt but the threads on the frame, so new bike or sheet metal screw, well anyway after cleaning those connections no better no ignition lights, than as directed pulled the battery ground off the frame, engine. cleaned with my round metal brush that connects to my drill, reconnected the wire, time out, why was there a small wire connector on the battery ground with no wire connected to it? well a lot of duct tape as someone was messing with the wiring, I have some evidence that toe engine was replaced, so before I replaced the gas tank I gave the engine a turn and wow there was a lot more power to everything, thinking the fuel pump was not receiving enough power either. so put the gas tank back on started the bike, took a few tries, but it started and ran pretty good especially when it warmed up and I drove around the neighborhood for a while, taking care as 65f in Chicago area has the kids outdoors. Learned my lesson to clean the thirty year old ground wires every so often. Thanks again for the help and I hope this helps others, relays, fuel pumps just about everything needs a good power source. yes and the battery is new and had 12 plus volts. I again love my 1987 k75
