Hi all! I put on a bi-turbo pipe and a hi- flow filter and up jetted to a 64 and my magnum 2hp 2speed only goes 32 mph . I know it is a heavy bike but i was thinking 35 to 40? The stock gearing is still on there 18-40.
there are a million other things to consider on an old bike like this. any of the following things could be robbing you of the 3-4mph you feel like you are missing.
old spark plug
worn out piston rings
air leak from cylinder to case
air leak from cylinder to intake manifold
air leak from intake manifold to carb
bad wheel bearings
bad engine bearings
the list goes on and on and on. gotta work through that shit and eliminate possibilities.
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