Aprilia rs 125 cdi derestriction the aprilia rs125 comes with a cdi restriction it retards ignition around 6000rpm so the bike can pass eu emission tests this makes your bike perform poor at around 6000rpm derestricting this will invalidate your warranty. Cdi derestriction the aprilia rs125 comes with a cdi restriction it retards ignition around 6000 rpm so the bike can pass eu emission tests so they can be manufactured this makes your bike perform very poor at 6000 rpm and does not let the engine pull away derestricting this will invalidate your warranty. Rs 125 cdi derestriction problem hi guys today i decided to derestrict my cdi acording to the instructions i found in apriliazone website because it is realy hard to ride it in the town with the 5000 6000rpm ditch. Tutorial on how to install a full power valve set up to an rs 125please give my video the thumbs up and subscribe to my channelthinking of trying new thing