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Peugeot speedfight 2 and it won't rev?

I have a Peugeot speedfight 2 scooter that starts but won't rev. anyone got any ideas how to fix this?
Emily Foxall, August 2011
carb,fueling,and exhaust systems are all ok. the immobiliser from the aec 400 system has been removed and replaced with an aftermarket cdi unit.

the bike is behaving as if the immobiliser isnt programmed to the key. ie starts fine but wont rev past about 2000 rpm. but the immobiliser isnt even wired in. neither is the origional cdi unit.

can some ne please tellme what i've done wrong?

emily, August 2011
could be the main jet in the carb. blocked.

rayb, August 2011
link Click here to see other fixes for Peugeot Speedfight 2.