New Speedo Breakdown

Posted by Schlutt on Jun 02, 2015; 1:33pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/New-Speedo-Breakdown-tp4056811.html

I have a ’79 CB750K that I picked up in a trade last year. It’s my first bike and I have learned a lot riding it and wrenching on it. I want to change out the bulky gauge cluster so I bought a “2.5" Chrome Mini Speedometer w/ Black Face & LED Indicator Lights” along with the matching Tach and mounted it using the “Dual Mini Gauge Cluster Console Bracket.,” all from Dime City Cycles. Worked an looked great for a while until last weekend I took it out for a longer run and noticed that the speedo needle jumped up to 90MPH when the guy I was riding with was at 75mph and about 15 min. later the needle went to 0 MPH. The mileage counter and the LEDs still work. Any ideas? Did I mount something wrong? Any help would be great.