Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
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Thanks to Ralf Brinkmann for sending me this information in a private e-mail. In Ralf's own words:
Tool is home made by hand with iron saw and a file set.
Parts list:
3 × flat iron 25 mm × 5 mm, 100 mm length
2 × flat iron 50 mm × 5 mm, 50 mm length
1 × washer 20 mm
1 × threaded bar 10 mm × ca. 300 mm length
1 × washer 10 mm
1 × nut 10 mm
The inner diameter of the 20 mm washer is 21 mm, one of the 50 mm × 5 mm flat iron has a hole with 11.5 mm diameter the other hole I did file to 26 mm diameter (On standard threading the pitch is omitted usually in Germany)
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
Tool for tensioning the disc brake spring.
Photo courtesy of Ralf Brinkmann.
One last note to Wirth springs
My theory: the narrow windings of the spring must point to the top - not into the bottom sleeve. The Wirth spring has little or no clearance to the bottom sleeve. If you put the narrow windings into the bottom sleeve due to the strong friction you will loose much of the smooth response.
