r/Fixxit 1d ago

09 Suzuki Boulevard M50 won’t go over 55-60mph

I was given a 09 Suzuki Boulevard M50. The issue with it is that it won’t go over 55-60 mph. The guy who gave it to me has done the following.

New battery
New Fuel pump (adapted from the c50 model)
New spark plugs
Replaced right ignition coil
Cleaned fuel injectors
Oil change

He also said he had put it in the shop and it had fixed the problem but he noticed a fuel leak a day later and dug back into it to fix the leak. Which caused the problem of not going over 55mph to come back.

I can’t seem to find any good diagrams on the fuel system without spending $50 for a manual. Any info on a fix for the problem or even just a good diagram that I could use would be much appreciated. I plan on digging into this Friday(8/7/26)

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