ive got this skyjet F5 125 sport bike on a 57plate and for some reason the rev counter doesnt work, i have checked that the earth wire (black) and the live wire (green) both function as they should however i'm trying to locate where the yellow and black wire goes to? i assume it is the one for the sensor but i cant for the life of me figure out exactly where it is? can anyone help?

Nick, July 2010

check both sides of the engine around the casings. the wire could lead down to there also the sensor if there is one will be around the engine area.

james, July 2010