i've put a 2004 peugeot speed fighter engine in my peugeot trekker and have changed the cdi over to make it run but the back wheel spins backwards when the cdi is moved around a bit it starts to run forward but cant get it to go forward continuosley can any1 help???? if you have any clues your input will be very help full thanks.

charlie, April 2010

this fault can really only happen with a faulty c d i unit! it alters the spark curve!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

m, April 2010

This is weird,the only reason i can think off is that the cdi is retarded and the engine is turning over the right way then firing and spinning back the other way.try this but its a bit tricky.take the magneto off using the correct extractor then take the woodruff key out and move the magneto slightly against the rotation of the engine and do it back up this will determine the problem but its not a permanent fix as the magneto can slip.you could also slot the bolt holes in the stator plate and turn that against the engines rotation this will also advance the timing dont go to mad with it though just a little bit .to do it properly you need a timing light and to make a firing mark on the magneto as i think they only have a tdc mark.i ahve seen this a few times but its not common seen it on a gs 125 and a xj600 pre diversion and an et4.

adam bike doctor, April 2010

i got the same problem with a speedfight 2 all i can think of is its the cdi i bought a imobilizer by pass cdi unit but it still does it

shaun, April 2010