ADJUSTABLE GURTNER MAIN JET
I think I am the only person who loves a stock Gurtner carb. Well, not the Peugeot carbs. Or the AR2-10 because you can’t remove the diffuser. But that AR2-12 and the AR1 carbs, that’s me all day. Years ago, when Handy Bikes was a wonderland of NOS parts and lore for those in the …