Auxiliary gauge mounts
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Frank Granli's auxiliary mounts
Thanks to Frank Granli who sent this information to me in a private communication. In Frank's own words:
There is also a picture showing my extra instruments for monitoring oil pressure and volts. Both are 52 mm instruments, placed in car exhaust pipe parts and clamped to the steering bar. Rather cheap and secure way of fitting those instruments, the problem is of course to make them watertight, but that could also be solved by choosing marine instruments :)
Ron Komoroski's auxiliary mounts
Thanks to Ron Komoroski who sent this information to me in a private communication. In Ron's own words:
When I was doing the resto on my bike I was still employed as a Senior Technician at an R&D Lab, working on Advanced Materials. As such I had access to all sorts of material stock. The mounts for the gages are made from two 3 inch long sections cut from a section of aluminum pipe I found on one of the stock racks. It's dimensions are: OD 2.63 inch wall thickness about 0.15 inch. Whether it's a standard size, Where it came from I have no idea. The labs were originally set up in the early 60's by the Babcock & Wilcox Company for their Nuclear development. The length of pipe had some age on it when I used it in the mid 90's, so it may well have been adropfrom some reactor component.
UPDATE: After writing the above I got curious & started looking through my collection ofsourcesAircraft Spruce & Specialty Company sellround aluminum tubing 6061T6in 2 inch and 2 inch ODs with 7 different IDs & wall thicknesses. It's sold by the foot. I've never dealt with this company, but I got the catalog from friend Clifford who has had good experience with them.
I polished the pipe sections and epoxied them to the front cutouts in my Police dash. I didn't want to drill holes in the dash casting in case the gages didn't work out & I wanted to go back to stock. The epoxy I used was a super-zootMeta-Set A4by Smooth On we had at the lab. (these days I use
The gage needles dodancefrom the bikes' vibes, & I've had to replace each gage once due to failure over the years/miles. The oil pressure gage is mechanical. I cut, drilled, tapped, threaded & silver soldered aTfixture that screws into the block & supplies a feed to the gage an allows me to keep the idiot light sender. The pressure line to the gage is plastic/teflon?, It has failed at the connection to theThose connection. Oil shot out from under the tank & made quite a mess. I ran the replacement pressure hose inside some tygon tubing to help damp vibration, & I carry an extra tube fitting with the hose melted closed to put on theTfor emergency repair if it ever happens again. I've got a set of high-bux VDO gages on the bench to install the next time I have the fairing off, I'm hoping they'll be more stable than the el-cheap-o Sunpros I've been using. The hot set-up would be gages filled with liquid silicon for vibration damping, but I've never found a silicon filled 2 inch gauge, it's only used in the larger sizes. Readings? w/about 45K on the motor rebuild, the oil pressure readings I get are: 60 PSI cold, 50 hot above 1000 RPM & 20 cold 15 hot at idle. I'm running the awesome Greg Field alternator & get a 14 volt reading as soon as the RPMs come off idle. If you zoom in on the picture & are curious about the black box between the gages on the front of the dash housing it is a turn signal beeper.