I've just about finished a full rebuild on a 1974 mk2A 850 and now have to make a few hard and fast decisions. The previous owner had done most of the work and had purchased a pair of new 34mm mk2 Concentrics then fitted them ready to go. Now I know I can't use a standard airbox with these so I'm left with a choice of using velocity stacks, K&N filters or the left field choice is to change over to a single carb and keep one as a spare. I've been assured that a single 34mm Concentric will supply enough fuel to run the bike properly and I'm not really after a performance increase so that's no big deal but (there's always a but) he also fitted a PW3 camshaft so would the single carb still be ok with this fitted?
Right now I'm leaning towards fitting velocity stacks and going up a couple of sizes on the main jets but it never hurts to get other peoples opinions and you guys seem to have tried most things with these bikes.
Go ahead, persuade me one way or another :?:
Right now I'm leaning towards fitting velocity stacks and going up a couple of sizes on the main jets but it never hurts to get other peoples opinions and you guys seem to have tried most things with these bikes.
Go ahead, persuade me one way or another :?: