Hi everyone, I stumbled across scooter shack on good old Google and was hoping there might be someone who can help me with my speedfighter hell. The first one is my sons bike 2003, 50cc, Was running, then wouldn't start one night, I have finally had a look and there was no spark, I have put a new coil / ht lead and new spark plug, still no spark??? The second bike is my project that I have started doing up, to start with I had to put a new starter motor on and a new clutch bendix gear, turning over no spark, so I put a new spark plug in a new coil/ht lead.... Now it won't even turn over, I have nothing, when you try to start it all you have is the oil light come on, it does have oil in it..... I am totally stumped now, please help
OK, let's start with the basics on your son's bike. No spark could be as simple as one of the wires having come loose from the ignition barrel. Check that all wires are connected at the barrel end, then check all multiplug connectors between the barrel and the generator. Check that the CDI Unit is connected up and that the contacts are clean. As for the second bike, check the brake light switches, does the brake light come on when you pull the rear brake? The brake light circuit activates the relay for the starter motor so if one of the wires has come off, the relay won't click and connect the battery to th starter motor. Pull back the little rubber covers on the brake levers and check that the contacts are clean and that the wires are firmly atteched. Then check that the relay clicks when you pull the brake lever with the ignition on. If all of those are OK, then check under the bike that the live wire to the starter motor is OK. The oil light coming on tells me that you have some power and that the fuse is OK, but have you the means to charge the battery, to make sure that you have enough power available to turn the starter?
Hi, thanks for replying yes I have a charger and charged it last night, will go over the other bits tomorrow
Sons bike sorted... Changed the cdi and that did the job, should have checked that sooner lol other bike still a headache
I haven't really been get my sons bike going, Im thinking maybe something silly as was turning over fine before I changed coil/ht, so I have had a quick look at wiring incase I've pulled something out, I tried the brake light as you suggested, still does nothing..... Maybe cdi??? when I Google someone said about the a sensor on the stand, that the bike thinks the stands not up but can't see a sensor anywhere on the stand
They don't have a stand sensor, not that model anyway. Can you hear the relay 'click' when you pull in the brake and press the start button? If the brake light does nothing, is the main fuse intact? It's a 5A blade fuse, located near the battery in a holder next to the starter relay.
Any brake lights now? Are the wires to the levers connected under the rubber covers? Just in case the switch is knackered, try shorting the wires at one of the brake levers with the ignition on - if the rear brake bulb is OK, it should light. The relay may need the resistance created by the brake light bulb to pull it on, so I'd recommend checking that the bulb is OK too.
OK, so if the brake light works but the relay doesn't click, the next step is to replace the relay. They aren't expensive to replace and that should get the starter working again. The brake light pulls the relay circuit on, connecting the battery to the starter motor so that it turns over when you hit the starter button.
I have just ordered a new relay, hopefully it's just that, thanks for your help, will let you know if it works
Hi again, with the relay the bike now turns over again, I just can't get her to fire up, I have had the carb off and all looks good, brand new spark plug, put a bit of petrol in spark plug hole and she still don't want to know
In order for a engine to run it needs three things. Spark - Remove the spark plug and lay it against the engine block while plugged into the HT lead. Your looking for a good strong, consistent blue spark. No spark/Orange spark = no run. Compression - Please dont say that it blows your thumb off, 10 psi will blow your thumb off the same as 120psi, Compression test it. anything below 90psi and it needs looking at. Fuel - Is the spark plug wet? If not, youve got no fuel going through.
I have a good spark, if it was fuel, wouldn't the fuel I put in spark plug hole be enough to at least try and fire up? I don't have a compression tester I will have to get one
No, You would get a quick pop and thats it. http://www.scootertherapy.com/startinghints.html - should help a little.
One thing with Peugeots. The vacuum fuel tap takes a lot of getting going again once it's been stood for a while. Try turning it over with a cloth stuffed into the carb throat (or a hand over it) until you are sure that fuel is getting to the carb. A good 5 second burst should do it, then remove the cloth and try starting it again.
