Request for Assistance: GPZ750R1 Speedo (meter) Squeaking!
Background: I have 1982 GPZ750 R1, all original, 21,000 miles, runs like a top, with a kerker header and dyno jets. My intent is to keep it 100% original and 100% fully functional.
Recently I developed a squeak or rhythmic cherping in the front of the motorcycle. After rebuilding the front and rear master cylinders, and then rebuilding the front and rear calipers, the squeaking continued. I also replaced the wheel bearings front and rear (all of the above needed replacing anyway), but the squeak continued.
Today I disconnected the speedo cable, and the squeaking stopped, so I lubed up the cable with some grease being careful not to grease the top foot or so and re-installed it. The squeaking continued….
I was then able to then isolate the Squeak to the “ACTUAL” speedo meter housing unit.
RFA: I have always been told never allow lubricants to enter the Speedo housing or it will cause the speedo needle to fail. (I think we all know this)
Question is then, how do I lube it? I have every type of lubricant (or I can buy it), but I don’t want to ruin the unit, as a replacement is not likely. I have the service manual but I cannot find any reference to separating the meter housing or lubing of it. Has anyone ever done this before? Is it a sealed unit?
Do any of the old timers have any recommendations as to how I can lube the actually speedo housing unit, without ruining it?
Thank you all in advance for your responses. I’m at loss and not sure what to do.
Pete in SA
1982 GPZ 750
2019 Z900RS Cafe
2011 HD SGC
Last edited by 10th MTN; 05-22-2019 at 10:47 PM.