Pilots and mains are from certain carbs. HD used 3 type jets for carbs like ours. There is also a Mikuni main that works. The Mikuni head is slightly smaller but the jet size is the same and the threads are the same. I used a pair in Wendys bike. HD has an old style that is wrong and 2 differet new styles one of witch is the same as ours,if you look them up in V Twin or one of those suppliers it is the smaller ones.

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