I bought this bike not running. Did simple stuff like plugs, fresh fuel, air filter, and so on. My problem ous the bike starts great and runs strong for about 5 to 10 min or approximately a mile or 2 then dies. Have to wait 3 to 5 min then it restarts. Keep repeating the cycle no matter if bike is cold or not. I checked spark its good, checked fuel add its good. Im at a total loss. Any help would be appreciated.

  • Welcome to Motor Vehicle Maintenance & Repair! Sounds like you have a fueling problem. I'm not sure if your Katana has gravity feed for your fuel (would be if it has a carburetor) or has a fuel pump (if it's fuel injected). If it has a fuel pump, it could be your fuel pump is going out. If it runs for a bit, then overheats and shuts down, would behave exactly as you describe. You'd have to put a fuel pressure gauge on it to tell if it's doing what it's doing, though. Or some way to know if the fuel pump is continuing to run. Feb 5, 2019 at 13:09
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    When it dies take the fuel cap off, if you hear a sucking noise when you do then the tank isn't venting properly and you're getting vacuum.
    – GdD
    Feb 5, 2019 at 13:26

1 Answer 1


Had problem like this before, it turned out to be the coil, once it got hot it separated an internal contact.

I fitted a new coil and it was fine. If you can get a known good spare that would be a good test.

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