Question about Honda Cb 400 Super Four Motorcycles
I have a honda cb 400. i accidently changed the spark plug cable of eng 2 to eng 1 and vice versa and tried to start but bike didnt start and made a detonate. after that i realised that the cable has been changed and i made the correction, but still bike not starting.
I had a honda 400 you need to check that the lead is correctly attached the top end does not just pull out you have to screw it in and the same at the plug end.i would first check your main 30 amp fuse and then check your plugs for any carbon deposits check you have the right firing order for it to run and if possible have someone check your coils for consistency hope this helps ..if you google cb 400 they're are plenty of PDF manuals you can download for free
Posted on Jan 19, 2015
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Posted on Jan 02, 2017
i could not find a schematic of a 96 cbr400rr, so guessing this bike is not from the USA. however, there should be a master fuse near the battery on the positive side mounted to the battery box somewhere. i would check this fuse first to see if its burned out.
also, is battery fully charged? might have to top charge the battery to get good juice if its old (>3 years) and been sitting for a bit.
Posted on Jan 28, 2009
Definatly a good tune up would help, but it also sounds as if you may have a bad stator. I would check the voltage at the battery and see if it goes up and down when accelorating.
Posted on Mar 11, 2009
SOURCE: 1974 honda cb550 will not run?
• The first thing to do with ANY engine that has sat for any longer
than a couple of months is to dump ALL the fuel in the tank and
carb(s). ALL OF IT !! You'll want to refill with some high priced fuel
that has fuel system cleaners (Like Chevron with Techron) not becasue
you need high-test fuel, but because you need the cleaners. It's ether
that or disassemble the carbs and clean out jets you can't find much
less see. Your choice. The carb kits alone will cost you about $50 so a
tank of high-test is looking pretty good, huh?
• Now the fact that you tried to crank the engine with old fuel has fouled the sparkplugs. All of them. Go buy all new sparkplugs.
Posted on Mar 21, 2009
I worked on a bunch of these bikes back when they were new and I was working at Mathews Honda in D.M. Iowa. Bear in mind that was 30 years ago. IF I recall correctly. . . . .
First, the points only open and close. Other than that they don't move. The points are adjusted for gap by being moved L and R then locking down in place with a screw.
Assuming you have a good set of points, set the point gaps to 15 thousandths. The timing is set by rotating the base plate the points are mounted on. Behind the plate is a centrifical advance. Get an inductive pickup timing light and hook it up to the battery. Hook the pick up on the left sparkplug wire.
Start the motor and point the light at the top of the gearbox flywheel. Yes, with the cover removed some oil will spit out. This is normal. Rev the bike and you will see the timing marks. You will also see a static timing mark on the casing. Rotate the points base plate to line up the marks. When you let off the gas the flywheel marks should move counter clockwise. If they don't, then remove the points cover and free up the centrifical advance mechanism. You just timed the engine.
The photo will not open in "FixYa". Email it to me at email@example.com. Would you like to know how to synchronize and balance the carbs?
Include your phone number in the email.
Posted on Mar 29, 2009
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