So, last week my tach magically worked for two days straight. I loved being able to see my revs
It also helped me better judge what rpm I was at. It has since stopped working again (I bought the bike with it not working so nothing surprising). The gauge cluster I have is the rectangular one that I believe was only used on the 83-85 cb650s.
Firstly, where the hell does the cable run that goes into my engine to simply determine the rpms? I've gotten down on my hands and knees multiple times with a flashlight and I can't find any sort of cable that goes into my upper or lower blocks anywhere. Sure there's lines that run from the oil pump/cooler but other than those I can't find shite.
Secondly, I was looking at a wiring diagram on the bike and I'm really electrically challenged but I was able to decipher what color the wires are that not only control the bulbs behind the tach but apparently which wires run the electronics too. I couldn't find the wires for that either. Checked under the seat and behind the headlight and I should probably check again but I couldn't find the correctly colored wires at all.
Thirdly, if it makes a difference... My battery terminals seems to developer the white puffy corrosion pretty quickly. So last week I took some sand paper and sanded and cleaned the terminals and cable ends. After I did this is when the tach started working. Also, there's a 'pie' slice missing from the circular washer that gets bolted to the positive terminal. Like maybe a 1/6th of the circle is just gone. Charging system is good, etc but I am looking to replace that positive cable here soon.
Thanks guys!
83 Tach Woes
83 Tach Woes
1983 CB650SC Nighthawk
Re: 83 Tach Woes
Your tack is electronic not cable driven. You must have a short in the wiring somewhere.
Did you clean the tank out?!?!?!?!
Re: 83 Tach Woes
Any idea where to start? Would the majority of the wiring be behind the headlight or under the seat? It must hook into a harness somewhere to get power. Would it be one of the bullet connectors or a part of a harness?
1983 CB650SC Nighthawk
Return to “Technical Discussion”
Who is online
Users browsing this forum: No registered users and 105 guests