1985 Limited FI -
Hey JW - I owned a 1986 SEi a few years ago which was a bit temperamental at times - especially if the battery wasn't fully charged. My 1983 Honda CX650 Turbo uses the same fuel injection system. Check the diagnostic error LED lights on the side of the computer to see if any sensors are being picked up as a problem.
Disconnect the battery ground - then remove, clean and reseat the computer's rectangular connector to make sure there is no surface contamination. An old toothbrush works great with some electrical pin cleaner. Jumper a car battery in parallel with the bike's battery to make sure there is a good voltage source to the computer and that the starter is spinning the motor over at a brisk RPM.
Make sure the connectors to the crank and cam position sensors are good. If the spark plugs are dry - remove the air cleaner element and carefully dump a couple of tea spoons of gas down into the intake to see if it's a fueling problem. Although you normally don't touch the throttle during a start - if the plugs are wet with fuel - during the next attempted start, crack the throttle open about halfway with the battery jumpered. Don't be too surprised if this step produces a major back fire which brings all the neighborhood dogs to a full fit of barks and howls.
Check the outside ambient air temp and intake air temp sensors for a good electrical connection. They can tell the computer to lengthen the injection pulse in error which can make the air/fuel mixture too rich to start.
Good Luck, Michael
Last edited by jkmcdonald123; 10-01-2018 at 09:44 AM.