Question about 2003 Aprilia RS 125
Hi, Jpcrawley and the usual suspects are:
1. Contaminated speedometer sensor.
2. Corroded, broken or loose connector pins/sockets in the wire harness between the speedometer and the sensor.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
DOWNLOAD 2003 Aprilia Rs 125
Posted on Oct 27, 2015
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Posted on Jan 02, 2017
SOURCE: de-restrict an aprilia rs 125
Hate to disagree with tina783, but you may have restrictions in place, there is two on the aprilia rs 125. if your on a L plate then the bike should be restricted to 11.5w of power, which is about 15 bhp, when it's de-restricted should be around 34bhp. First is the power valve or a RAVE Valve as some people call it, have you got one? located on the front of the cylinder body, above the exhaust. some times the body of the power valve is there, but there is a blanking plate is underneath it. If the body of the power valve is missing, then its a blanking plate. need to get a power valve and the control unit and the solenoid, fitting is easy look around the net and you'll find one. The next one is the emissions restriction, which is in place due to italy have a real hard on about thier air. The CDI at the back of the back of the bike needs to removed and then if you look at one side you will see a rubber sealant has been used to fill in one side. You need to dig that out and snap a little piece of the circuit board and then refill the hole with a rubber sealant. try to search the net for a how to do on this you need to look at the pics and see what part of the board needs snapping, don't go blindly into this other wise you will kill the CDI. the bike then will act alot more smoothly in the lower end revs.
Posted on Aug 02, 2009
yes buddy as the rs125 dont have fans on the radiators so the faster you go the more are passes through the radiator to cool it down dont worry abour it buddy there built for this or if your not happ install a fan your self also just make sure you have coolant in there
Posted on Sep 25, 2009
SOURCE: Aprilia RS 125 Power Loss
I guess youwillhaveto adjust the clutch cable so as to open the plates more at the pressure plates to let the clutch plate rotate freely instead of binding thus the low rpm.
Hope this helps!
Posted on Oct 30, 2009
hi not putting you off but when i fitted a arrow exhaust system and power valve. i had great power. but i had to rebuild the engine every 800 - 1000 mls. regards
Posted on Jan 31, 2010
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