chappo Posted January 15, 2019 Share Posted January 15, 2019 I’m currently renovating a 1979 325 Sherpa which has the small air box with the door on the side. I be heard a lot of negativetity over the years about them being to small. Would a later 199b be better? Will it fit? I intend to run a 26mm Mikuni on this bike. What do you guys use? Many thanks. Quote Link to comment Share on other sites More sharing options...
bullylover Posted January 15, 2019 Share Posted January 15, 2019 The go to setup has always been a M159 style of airbox on the later Sherpas. They are supposed to breath a lot better. A lot of folk also use a M199B style of air filter in the M199A airbox which I have heard also works well. Graham. 1 1 Quote Link to comment Share on other sites More sharing options...
sherpa325 Posted January 16, 2019 Share Posted January 16, 2019 I would say either the 159 or 199B would be better than the original 199A. All the factory bikes used the 159 style so it sort of is period correct and they have the advantage of being a fair bit narrower than the std one and the side panels don't fall off either. Cheers Greg 2 Quote Link to comment Share on other sites More sharing options...
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