i have a speedfight and i put a 100cc wireing loom and engine and the 100cc did run when it was on the uther frame, i changed it on 2 my frame and the imobiliser light is stuck on when i turn the ignition on, how can i fix this, i dont have the red key, help :)

JAKE, March 2010

the lads are right, get the cdi and chip off the other bike or but bypass box (i have 1) please remember thee have rolling codes and you cant mix parts, you didnt tell us how old it was? if its pre 2000 this can be bypassed realy easy done shedloads and its cheap as chips

m, March 2010

well you will be needing the immobilser/cdi off the 100cc bike and the chip that was in the key that belonged to it to get yours to work now.

adam bike doctor, March 2010

Hmmm. I would say when you took it apart the CDI thought you were nicking it and it is now on all the time. Try the other CDI on it but I guessing its off a 50??
You wil have to get a new CDI without immob in it. See LOTS of other previous posts about those blessed speedfights!! No red key =no go!

bb, March 2010