Hi all.

Was there any answer to this? I have just bn told mine is on the way out for my 05 FSE450. Would be good if there could be an easy answer.

Sadly still no info and i was told that theres no stock in GasGas factory :S

I got my hands on 2002 FSE400 electrical schematic and i was suprised that they use there "ordinary" ignition coil (2-pin connection). So why did they install 4 pin pencil coils from 2004? Does that mean that we could just replace the pencil coil with random ordinary ignition coil?
Or was there maybe a reason that they would use 4pin coil that has built in igniter?

Okay...little bit success. I got one Denso coil from Honda CBR 1000RR (p.n.129700-5150) and....it works!!
At the moment i have tried it only in garage but as soon as i get my hands on Denso connector, i'll go for a test ride and will let you know if it works or will it die :)

Okay, so got all the connectors and made a little guide for anyone looking for a cheap alternative for GasGas ignition coil. This should work from 2004-2006 bikes which have the 4 pin ignition coil with part numbers: BFS450334000 , MFS400380006 maybe some other numbers also.
New replacement coil is with part number: 129700-5150 (some other 129700 coils might work too, but i don't know the length of the other ones, 5150 is just the right legth!)
This is Denso coil and is used on different bikes....Hayabusa, CBR etc....so pretty common.(i got mine from ebay for ~$16, low mileage, like new)
If you don't want to damage the original wiring then you also need one VAG connector and one Denso connector. You could skip the Denso connector and use 3.2mm insulated terminals and just fill the coil side connection with silicone.
Part numbers are on the picture. So here's the little guide:
CLICK HERE

I have made couple of test runs with this coil and everything works great!

Hi Vinny,

Can you please send me the same info. I'm having the exact same issue

Try checking the connections to the ECU. If i remember correctly then Vinny had bad connection to pin 20.

Tafka,

How did you go with the testing?
If I can't get this fixed Im about to chuck Gas Gas away as this is my first issue with the bike and can get no support on it in Melbourne. All Mechs here, although very knowledgeable and helpful, seam to have moved away from this era of bike.

Well the coil works, no troubles at the moment with the coil.
Still have some issuses when hot but those are not realted to ignition coil...i think my fuel mixture is out of balance somewhy :/
Would love to change my GasGas to some other bike also, because i'm fed up with the issues....BUT i don't have the heart to sell "broken" things to others...not like the previous owner who sold me the bike and few months later i had the pleasure to change almost everything in the engine :) My dealer has also no idea what could be wrong with the bike :/

VAG coil did not work! At least one that i tried....but theres many many versions of VAG coils.
Connector may be the same but that doesn't mean it works.
But if you say your coil has VW/Audi logos then share a picture or part number for others :)