Shakedown ride shook the spark

[themoudie]

Aye Mackenzie,

This link will not provide comfort, but seems typical of the palaver that you and others have with old GN250 ignition.

GN250-ignition-woe

I can only suggest as others have here and on other sites to other folks with the same problem, clean all the connections, be methodical and expect to be a very long time. In your case the CDI appears to be the problem, but have you identified why it blew in the first place? It would appear that that fault still remained when you connected up the replacement unit and that too has gone 'PHUT'!

If it helps, view the wires as water pipes and some maybe leaking in hidden places, where they maybe chafed or subject to regular pushing or pulling. Wires may also be covered in verdigree behind covers or within connectors and are out of sight. Pull each joint, multi-connector apart in a systematic order and clean and protect with ACF50 or replace as you go along. Tedious, yes, but as you previuosly said you wont be paying somebody else to do what you can do and you'll be learning as you go.

Source of wiring supplies. Link: Vehicle_Wiring_Products

As the Python song goes "Always look on the bright side......!"

Hope this helps.

My regards, Bill.

[Propellor]

Mega frustrating, after putting so much work in. Hopefully your sparky geeza can sort it.

Are you using a cdi unit specifically designed for this bike?

From what I can gather there are two basic types. Ac-cdi, which don't require a battery as they generate a pulse from a coil on the "flywheel". And battery cdi, which use the dc supply from the battery and convert it via a mini inverter, built in. Apparently this type need a battery in good health. I presume you have this type as you have said you've got voltage at the coil?

Another possibility is that you're using a 6 volt version on a 12 volt system? Or vice versa. Dunno. Just (feebly) throwing ideas up.

Good luck.


Edit: maybe you're using a cdi unit for the "bike" (van van) whereas you should use one (and wire a circuit accordingly) for the "engine" ? Is that a possibility? I don't know enough about either bike to be sure.

[guest1406]

Hi All,

Sorry for the delay in news, been a few busy days.

In the end we knew it was coil. The coil used was a mini universal one which just wasn't compatible with the circuit, additionally i don't think the moody Chinese copy of a cdi helped either .. .

So I ordered a brand new GN250 coil first class and it arrived at 1pm on Saturday. Bearing in mind I had work from 2pm to 10pm and we had to be in Dunsfold aerodrome (50 miles away) at 10am sunday morning. It was a mad rush and i ended up finishing the bike up at 1am sunday morning. It turned out it just needed the original coil.

I was very nervous for the bikes 100+ mile drive on its first day, but it made it with very minor issues that can be easily dealt with. The shoot was good fun, a good experience and the model ended up posing on my bike for a while!! i'll definitely get some pics when the mags out in September or so.

So now its just fine tune and adjust pretty much everything but im happy with the outcome!

Mackenzie

[Moto63]

Nice one, knew it,d be worth it in the end for you. We'll done. Looking forward to seeing the pics, the curvy lines, the sleek poses. And some of your bike too.   Regards Michael