Engine Keeps Running

[Guest]

Hi guys

Well got a query here. Not so much of a problem for me, But i still wouldnt mind solving this issue, Incase its not MOT worthy the way it is..

Basically..

When starting my motorbike, the key has to be inserted and clicked on.. But once the bike is running, i can switch the key off and even remove it, and the engine remains running fully, just minus the electrics, all of those go out..

This is a short video of what i mean..

http://www.youtube.com/watch?v=TeAb7vr-Uec

Ive checked wiring etc, Nothing seams out of the ordinary.. The previous owner also installed a dead lock hidden on the bike, so once turned off, the bike cannot be started.. I thought this could have something to do with it, so i removed it all, but problem still remains..

Any help is very much apreciated...

[Mrbarry]

Once you have stopped the engine can you start it with out replacing the key?

[Guest]

No fella.

They key has to be in, and has to be switched on in order to start the bike.

But once its started, you can remove it, and the engine still runs. Although removing the key kills all electrics..

[Mrbarry]

Do you have a wiring diagram I can look at? What bike is it?

[eastanglianbiker]

sounds to me like you have got a live feed from the generator going to the cdi unit hence it is self generating untill you stop it and it then needs switch live to fire up again,what hapend if you use the kill switch if it has one does that stop it runing?

[Guest]

unfortunately i dont have a wiring diagram for it..

Its a chinese replica bike.. Similar to the Honda CBR 125r, (in my sig) but not exactly..

So i dont want to follow wiring that may be slightly different in some ways..

EastAnglianBiker:

Im guessing you havent watched the short youtube video that i put to in the first post?

Yeah bud, it has a kill switch on the handlebars, Thats what has to be used to shut it off..

[Mrbarry]

To make it stop off the key would be easy with an extra relay, but adding components isn't fixing the problem, its pandering to it.

If you was in the wolves area I'd have a look at it for you. Distance diagnostics isn't easy lol.

[eastanglianbiker]

have you replaced the ign switch at all because it has got to be feed to cdi problem i would of thought

[Guest]

I havent changed it at all

But funny you should say that.. The bike has obviously previously had it changed, before i took ownership of it, Because the barrell and key both have Hoda printed on them..

And my bike is a skyjet..

[eastanglianbiker]

that could be your problem then the set up in the back of the ign switch could be different

[Guest]

that could be your problem then the set up in the back of the ign switch could be different

 

There are only two wires on the back of the barrel fella..

Red and Black Wires... And thats it..

[megawatt]

You have a loose contact inside the ignition switch. Replace switch with a good one or fairly soon you will have no ignition and a bike that won't start.

[eastanglianbiker]

have you traced the ign wire right back to the plug where it goes into the main loom as often they are 3 or 4 wired you might well have one missing im only guessing that tho but worth checking as you dont know if it had the problem before u gt it as well

[Guest]

have you traced the ign wire right back to the plug where it goes into the main loom as often they are 3 or 4 wired you might well have one missing im only guessing that tho but worth checking as you dont know if it had the problem before u gt it as well

 

OK, coming from the ignition barrel, there are two wires, One black and One red..

These follow all the way down to a 4pin connector, where there are 4 wires, two reds and two blacks..

The other red and black wires are what go to the dead lock that the previous owner had installed..

The dead lock is a simple on and off key switch..

Im guessing those wires are meant to go somewhere else??

cheers

[eastanglianbiker]

are you sure that the original ign didnt have 4 wires coming out of it and he repalced it with the one now on there and the other bit he added to get over the problem it created? if you look at this new ign it has at least 3 wires coming out of it that i can see http://www.ebay.co.uk/itm/Chinese-Motor ... 589be7bd16

[Grumpy Old Git]

The two (fitted on your 'Honda' switch) MUST be to the starter cct. otherwise you would be unable to start the bike.

The other two are the ignition feed.

Replace ignition switch with correct type and wire as per the bike wiring diagram.

[Guest]

I honestly dont know fella..

I never bought it off the previous owner himself..

He had an accident on it, refused to get back on it,, sold it to a motorbike spares and repairs shop, i then bought it off the shop..

Kirkwood Motorcycles in Hammersmith, London,.. to be precice..

The dead lock switch does not allow the bike to be started, and if the bike is running, the dead lock cuts the engine off..

So cant i just add the red and black dead lock wires straight to the other two wires on the ign barrel?

This will give the same result, shut the engine off when the key is switched off..

Im a bit wary here as to what to do, without a heads up really..

No previous experience with these bikes, and no experience with these sort of issues, No proper service or owners manual (cant even download a correct one in pdf because its a chinese bike), and cant find a matching honda cbr 125r manual (because thats what this bike copies)..

Grumpy Old Git: I have not got a diagram that exactly matches my bike, so i cant..

cheers

[eastanglianbiker]

comparing cbr125 ignition switches some are 2 wire some are 4 wire depending on year so who ever replaced the one on your bike has got it wrong.you have 2 choices carry on as you are with it or replace the ign unit again

[Guest]

Well not buying a new ignition barrel wasnt my original intention..

Not exactly a cheap option haha

But if thats what it needs then im guessing it will need to be done

[eastanglianbiker]

before you go doing that check and make sure they havent butchered the original plug on the main loom to change it about otherwise you are just going to run into more trouble

[Grumpy Old Git]

At work at the mo so can't 'search google' but there may be a Skyjet Owners Forum somewhere - someone will have a wiring diagram that you could get access to (or advice from the owner). The non-restricted site search details your model and dealerships - have you tried talking with their staff?

DO NOT cross connect the two reds and two blacks together without proffesional advice (or a wiring diagram) as this could cause serius damage (even an electrical fire!).

[Tango]

Dunno mate....but this is a generic Chinese 4-stroke wiring diagram.....see if you can mak sense of it, but it looks to me like the wires that are taken to the Dead switch on your bike would normally be fed to the Main Switch and would be shorted together when the switch is off....although from this diagram they are different colours......

[Guest]

Dunno mate....but this is a generic Chinese 4-stroke wiring diagram.....see if you can mak sense of it, but it looks to me like the wires that are taken to the Dead switch on your bike would normally be fed to the Main Switch and would be shorted together when the switch is off....although from this diagram they are different colours......

 

hi fella

Yeah the wires to the dead switch, When twisted together, stop everything working on the bike, including cutting the engine off.

So yeah, your spot on with what your saying..

Ive removed the dead lock, but what do i now do with the wires to make it so the key shuts the engine off?

So basically, when you turn the key to OFF position, those wires are essentially joined, which shuts everything off

cheers

[Tango]

Yep....that's about it. The key switch would normally have 4 wires going to it......2 which are connected together to put power onto the bike for starting.....which are there already....and those other 2 wires that would be joined together to kill the ignition.....basically it grounds one side of the CDI to kill the spark......

[eastanglianbiker]

the ign switch you have is not seet up to do that so it never will you either have to add a seperate engine kill like it had or go original ign