Tool for accessing transmission pre-selector adjustment locking nut

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

Created: 2022 October 18

Updated: 2022 December 12

Thanks to Dan Eberhardt for sending me this information via email. In Dan's own words and photos:

I thought I'd pass along this tool I made for loosening and tightening the 19 mm locking nut on the transmission adjustment bolt at the rear of the 5 speed transmission on an Eldorado. Due to limited access in this area with the transmission in the bike I've always had a tough time adjusting the pre-selector at the rear of the transmission so I bought a USD $6.99 Jetech 12 point 19 mm combination wrench off Amazon and cut the open end off leaving the overall length of the box end portion about 5 ³⁄₄ inch long. Then I ground down the sides until the width was about a ¹⁄₄ inch for about 2 ¹⁄₄ inch from the backside of the box end. Once the locking nut is loosened I like to run the adjustment bolt all the way in and start my adjustments from there remembering to not go more than a little over a half turn out so the adjuster doesn't pop out of the shift return spring! The wrench works really well and makes this task so much less frustrating.

Thanks to Jim Pissot for sending me this information via email. In Jim's own words and photos:

Noticed you posted a modified wrench. Attached are photos of one I built recently. Could be useful for your readers.