Bike has been running just fine. Recently left the lights on while at work, completely draining the battery. Couldn't get it push started there, but was able to get it jumped. I thought no biggie right, new battery, easy fix. Wrong. Bought a new battery, charged it up, but still no start. Thinking maybe a blown fuse with the jump since it was done with the car off. Any advice?

  • is your bike a 6v or 12v? cars are 12v.
    – joe
    Commented May 5, 2011 at 17:46
  • 1
    the bike is 12v
    – Garrett
    Commented May 6, 2011 at 3:38
  • So you got a jump start and drove the bike home, but it won't start after you replaced the battery?
    – TMN
    Commented May 2, 2016 at 16:00

3 Answers 3


The Katana has a fuse for the starter located on the starter relay underneath the rear of the banana seat. Under the passenger.

There is a plastic cover over it, so it's not easily seen. The plastic cover is white. Pop that off and check the 30amp fuse.

When you jump start a bike, do not have the car engine running, just use the battery. The amperage is too high. I've seen a battery blow up before from doing that. It was the 80's so the tech was pretty low end at the time but that just illiterates how hard a high amperage push into an MC battery can be.

enter image description here

The fuse is labeled 1B in the illustration. The white cover I referenced is 1A.

Best of luck. Hope this helpful.


Double check that your battery connections are secure and clean. There is a chance that the brand new battery is bad. Make sure your head-light at least comes on when trying to start it.

Jump starting the bike should not do damage unless, you touch some thing other than the battery with the positive cable. I would not rule the chance out that there could be electrical damage due to the jump start.

  • Double checked the connections and everything secure/clean. I went and picked up a multimeter and checked the battery on Ohms setting, and meter showed GOOD. I checked the solenoid (sp?) and fuses as well, also read GOOD. Possible wire burn out? Thanks for the assistance
    – Garrett
    Commented May 6, 2011 at 3:40
  • Also no headlights/turn signals. And im short a wiring diagram to actually see whats next in the troubleshooting process.... Thanks for the assistance
    – Garrett
    Commented May 6, 2011 at 3:46
  • @Garrett: If i understand this comment correctly, your headlights and turn signals aren't working either when the ignition is switched on? This points to something systemic, rather than something with just the starter or one fuse. Check the connections on the ground side of the battery.
    – mac
    Commented Jul 17, 2012 at 15:32

Check your fuses (I believe under seat on that model, possibly under left side body panel). Visually inspect them, and check for for connectivity (low Ohm, or use audible connectivity setting if the meter has one). Some models have an ignition breaker that can be toggled.

Parts diagrams are available from some dealers websites (Ron Ayers, Alphasports, others) and model-specific service manuals can usually be found through searches or motorcycle forums.

If the fuses aren't the source, trace 12v DC from the battery through the fuse box, ignition switch (red & orange are ignition circuit, brown & grey are running lights), and starter button and relay.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .