Motor bike mechanics....please help.?

Question

I have a CBR 600 F on a P reg (1997). I am having a few mechanical problems with it. I just need to know what maybe causing the problem.

1) I have had the battery replaced but it is flat as a pancake
2) Have managed to jump start the bike, warmed it up (with the choke on) but as soon as i turn it of the bike dies.
3)The bike will not "tick over" unless it is constantly revved up or the choke is on.

It has been suggested by a friend that the alternater may have gone. I know the alternater charges the battery, but i thought both the battery and alternater were no longer used to run the engine once the bike was started.

Any ideas.

Answer 1

Teh alternator, if that bike has one, is needed to run the bike. If the alternator is not producing electricity, it will only run for as long as the battery can create spark, which isnt very long. You should take a multimeter, borrow one if you dont have it, and measure the voltage at your battery while running. The battery should have around 12-13 volts when off, but running the alternator will send a charge to the battery raising the voltage to 13-15 volts. I do not believe that your bike has an actual alternator though, I believe it is a stator coil. Just keep in mind that those voltages are all in DC.

Best of luck

Answer 2

Firstly you say that new battery appears dead flat

If the battery is definately charged but fails ti light anything up on the bike then I would look at the master fuse and battery connections, earth connection and solenoid connections. Check to see if power is getting through to other circuits. Honda's do tend to suffer with terminal corrosion as water gets into the "sealed" connections.

Once charges the battery should start and run the bike even if that alternator has failed and as the battery gets lower on power then the engine will cut out but not the other way round

I think you will find that the battery power is not reaching the other electrics and that you will probably find a corroded connection somewhere

Good luck as the spring and better weather is on it's way

Ride safe

Answer 3

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Answer 4

If you are getting problems with a flat battery even though it is new and you rekon the alternator is working it may be just a problem as simple as a bad earth.This happened to me and because it was winter there was a bit of corrosion on the terminals.You will be surprised how much this can affect the battery.Give them a dam good clean up before you start paying out on expensive parts.

Also as it is winter it may be difficult to start if you do not have a thin enough oil.I tried to run my bike on Castrol R40 through winter and it was too damn thick to turn the engine over and get a good spark.Changing to a 10W40 did the trick.

Good luck

Answer 5

Some bikes, the battery has to be charged to run the system. The alternator just keeps the battery charged. Had this taught to me after trying to push start a 500 Yamaha years ago.

Answer 6

Yes the alternator does charge the battery but it's primary duty is to run the bike. Ones the bike starts, your battery steps back and rests. With modern circuitry, the ICs in the Control need a stable supply of juice. If your alternator is shot, it won't get this. Have an auto electrician check it.
Cheers
tj

Answer 7

Check alternator;

Have bike running at tickover speed with lights on. Watch headlight & rev engine, it should get brighter when engine revved. If not alternator problem. To be sure use voltmeter accross battery terminals with engine running, from tickover increase revs, volts should rise.

Sort out electical problem first i.e. why battery not charging & other problem (not ticking over) may go away.

Has the bike been garaged over the winter? Y/N

Has the bike been standing long time without being started?

The battery & alternator are integral parts of the bikes electrics (same on cars) if battery dies takes out whole electrical system with it.

Give me some more info if poss.

Answer 8

Yes! your friend could be right - you still need a current to charge the coils and fire the plugs - not enough current it will die on you! I had the CBX750Zf (I think it was Zf) - it had a similar problem and although the light didn't come on to signify a fault in the electrical system - when tested the alternator was Kapput! Replaced and fine - it's a ten minute test at a Honda dealer - they'll tell you straight away if it is the alternator

Answer 9

hey, firstly congrats on riding a Blade. i ride a CBR900RR. Fireblades rock !

check out the regulator-rectifier ,
they blow from time to time and cause all sorts of starting and charging problems. i bet its the regulator.
i had the same kind of prob with my 900 and found the reg. was stuffed. changed it and have had no issues so far.

also check out the Stator (alternator - if you want to call it that) charging readings.
there is a flow chart for checking the readings of the reg. and stator, just have to find it on the net.

i have put up some links for you, that have helped me in the past.
check them out, RR Zone web is great, go to the forums you may find your answer or ask Blade experts from all over the worlds. also click the link to the CBR600F parts Fiche, or find it on the on the Ron Ayers web. look up your model bike and all the part numbers and maps will come up.
just hunt through the links i gave you, you will stumble over what you need sooner or later.
very useful.

the reg. mate ! the reg. !

good luck.

PS: im no motorbike mechanic ! but i get around.
:P

Answer 10

It's probably the rectifier, a very common failure on 90's Hondas. Sort the battery issue first, the running problems are likely to be a by product because the ignition system hasn't got enough juice to function properly.