I have a BA02 with aftermarket pipes, AI removed and rejetted after Dyno run. Before I replaced the pipes the bike was running a bit rough so changed the plugs...bingo ran sweet. After 1000Km ran rough again so again changed plugs...bingo. Then I did the upgrading of pipes etc. Afetr short while again the bike ran rough. Back to Dynotech to sus the problem out. After 2 hours running through carb balance fuel etc a pair of substitute coils were fitted as resisitance on testing was more than poor. Eureka it ran smooth. Contacted Jack Lilley dealer and apparently BA's are notorious with coils. Now have 2 new ones and the Bonny is running sweeter than I have ever known it. If any of you have running problems it is worth a check
