I have replacement Truss Rod Wrenches available. They are the closest I’ve found to the original wrench. The barrel is a bit longer, but it fits in the pocket of the (4) vintage FG’s I’ve tried it in. I would suggest you assist the wrench by back bowing the neck, as described in this article. yamahavintagefg.boards.net/thread/14/properly-adjust-truss-rod I am considering making and offering the back bow block for sale.
They are $6 each, plus $6 (First Class), US only. Shipping to Canada is $15. Payment in US Dollars. Other countries by quote only.
There won’t be an additional shipping charge for multiple quantities, up to 5 items.
Payment will be by PAYPAL only.
Email YamahaVintageFG@gmail.com with any questions.