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So I just purchased a 2000 Suzuki Katana 600. The bike cranks but doesn't want to start. I had the battery tested and it was good. I can get it started with some starter fluid. Then if I go ride it or it sits for any amount of time I have the same issue. It cranks over but it sounds like it's really struggling to do so then after continuously trying it stops cranking. So it sounds like a battery but was told it was good. Any help would be greatly appreciated.

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  • Welcome to Motor Vehicle Maintenance & Repair! Apr 28, 2022 at 20:59

1 Answer 1

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Always start with the basics. To run an gasoline internal combustion engine requires:

  1. Fuel
  2. Air
  3. Compression
  4. Ignition

First of all this bike has carburetors and these can be very sensitive to storage especially with ethanol-laced fuels. From your description that it starts on starter fluid indicate problems with fueling. You'll probably want to rebuild the carbs to resolve this issue. There are some in-fuel carb cleaning products but I've had little success with any of them. But they are relatively inexpensive and easy to use so it's probably worth a try. Also check that the choke or cold-start enriching circuit and its control is working properly.

Check your airbox and air cleaner to be sure nothing has built a nest in there and the filter is clean.

A compression test is simple enough to do and will give you an indication of the health of the piston rings and valves. These types of engines will run on 3 out of 4 cylinders but not well and can be difficult to start.

It sounds like your ignition, i.e. spark plugs and coils are working OK. So I'd leave those go for now.

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