Eccentric preselector adjuster screw

[Mr5568]

What is the eccentric adjustment screw on the back of my V50 Monza gear box for? The reason I'm asking is I've just finished putting my '82 Monza together after 18 years in boxes. It needed a transmission overhaul, which I performed myself. It shifts up just fine, but to go back down through the gears requires a lot fussing around pulling the foot lever up a bit before I can find the next gear down. I'm exploring all of the possible simple solutions before dismantling my transmission (again). Could an improper setting of the eccentric adjuster be part (all) of the problem? Thanks in advance for any help or suggestions.

[Kiwi_Roy]

Thats what the eccentric is for, to centre the pawls for Up/Down shift.
Dont ask me how to adjust it.

[Chuck in Indiana]

I *think* it is your problem. Before I disassembled it, though, I'd try changing it a bit one way, see if it makes a difference, maybe the other way, etc.
Disclaimer: I've not done this..

[wirespokes]

I just read about that adjuster in Guzziology last week. Dave said to loosen the jam nut and turn the bolt one flat. He didn't know which direction would affect up, or down. But he said it will affect the distance the shifter moves on an upshift or down. You can reduce the distance required on an upshift (or downshift) by adjusting that bolt.

He also said to not adjust it move that six flats - I guess that would be one turn of the bolt. I'm guessing if it increases the distance on way, it will, at the same time, decrease it the other.

[Muzz]

When I had my Breva box apart I marked it so that when the mark pointed towards the front of the box that was in the right place.

Must say it was a trap for the unwary though.

[Kiwi_Roy]

I know its a loop but this excellent booklet from John Noble mentions the Pawl Adjustment several times.

Towards the end of the text it talks about adjusting it.
http://www.thisoldtractor.com/guzzitech.dk/pdf/gearbox-rebuilding-john-noble.pdf