CDI Derestriction
The Aprilia RS125 comes with a CDI restriction. It retards ignition around 6,000 RPM so the bike can pass EU emission tests so they can be manufactured. This makes your bike perform very poor at 6,000 RPM and does not let the engine pull away. Derestricting this will invalidate your warranty. If your bike is in warranty, the best thing to do is buy another CDI and derestrict this and use it on your bike.
Derestricting the CDI?
The CDI is a black box under the passenger seat. Therefore to get to it you will need to remove the tail of the bike. The easiest way to do this is to remove the rear side fairings with the tail. See the manual for more details.
The CDI will have a serial number on it? if the serial number is in the following format 071000-XXXX-XXXXX then this derestriction will work if done correctly (may still work on others).
The Aprilia RS125 is often restricted as per EU-standards learner legal form, but could be derestricted to full power (claimed 33bhp). To do this you will need the following items:
o RAVE controller
o Powervalve blade
o Solenoid
o Cable
If your RS125 is restricted, then it will not get a significant power increase around 8,000 RPM.
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