Question about 1999 Aprilia RS 125 Extrema

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Aprilia rs 125 2003 wont rev past 5000rpm in first or second

154 kit fitted, new 34mm carb, starts fine pulls away but wont go past 5000rpm in first or second any help will be appreiciated ty

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Check the rev limmiter

Posted on May 19, 2009

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Posted on Jan 02, 2017

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Hi... I've have aprilia rs125 97 model.. When start up the motor it can rev perfectly, but then it cannot rev more then 8000 rpm.. I've changed the plug coil ang new spark plug, but still the same.


Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question and downloads that you will need please visit the websites below. Good luck and have a nice day.
Aprilia Rs125 wont rev over 8000rpm
Aprilia rs 125 mid rev problem
http://www.apriliaforum.com/forums/showthread.php?288926-Aprilia-RS-125-wont-rev-passed-9000-RPM
http://aprilia-taiwan.com.tw/servicearea/SERVICE-MANUAL/RS4%20125/APRILIA_MSS_1587490_EN_RS4%20125.pdf

Jan 15, 2016 | Aprilia Motorcycles

1 Answer

My apprilia rs 125 wont rev over 8000 rpm


Hi Anonymous, I am sorry you can't find the first and best tool you ever bought for your Aprilia but despair not for a mere $10 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.
Aprilia Rs125 wont rev over 8000rpm
http://www.apriliaforum.com/forums/showthread.php?288926-Aprilia-RS-125-wont-rev-passed-9000-RPM
bike lost all power and wont rev past 8000rpm
DOWNLOAD Aprilia Rs 125

Feb 09, 2014 | Aprilia Motorcycles

1 Answer

Cold start on aprilia 650 1999 model a problem. I know only the one carb is chocked.is there a way to choke the second carb as well? if I smuther air intake at box it starts very easy


Hi, Coetzee you may need to go through your carburetors and I am sorry you can't find the first and best tool you ever bought for your Aprilia but despair not for a mere $10 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.
How to clean blast out Aprilia RS 125 carb carburettor 34mm 28mm
DOWNLOAD 1999 Aprilia Pegaso 650

Aug 01, 2013 | 1999 Aprilia Pegaso 650

1 Answer

Hi i have just bought an aprillia mx 125 and was told it was full power but when im riding it wont rev past 5000rpm and just splutters when i try,


Hi, Samfoster22 and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question please visit the website below. Good luck and have a nice day.
https://www.tradebit.com/filesharing.php/search/0/2007+aprilia+mx+125

Sep 22, 2011 | 2007 Aprilia RS 125

1 Answer

Aprilia rs 125 2002 model, wont idle properly, airfilter bad condition, if i buy new air filter would it make a difference on the revs when idlin??


Yes, air filter if really dirty,wet or messed up would cause it starving to get proper air to carbs. If that don't do it then next focus on possible fuel filter replacement. Please let me know results, thanks mike

Jun 06, 2011 | 2002 Aprilia RS 125

3 Answers

Digital display wont work


20 05 Aprilia RS 125 ive just rebuilt engine , started up ran fine , put fuel tnk ack on now wont stat at all dont even spark i heard bleaping noise from imobilizer help please thank you colin

Oct 25, 2009 | 2003 Aprilia RS 125

1 Answer

Flat spot from 5000rpm-6000rpm


it sounds like you have a blocked jet,pull the carbs out,remove the bowls and inspect /clean the fuel jets,be carefull not to overtighten the jets when you put them back in as they are only very thin brass and quite fragile..hope this helps

Jul 06, 2009 | 1998 Aprilia RS 125 Extrema

2 Answers

GSXR 750 Slingshot wont rev past 5000rpm, with or without choke


I have seen this before a few things to do too make sure. First take the air filter out and shine a light use your fingers to move the slides up and down I suspect the springs that go on the slide is not seated in center you can tell from the slide going halfway and hanging up. Next, the boots on the slides only go on 1 way there is a notch on the carbs for them. I would guess this would fix you up if not we can get deeper into it with air-fuel mix screw settings.good luck

Mar 23, 2009 | 1998 Suzuki GSX-R 750 W

1 Answer

2006 Aprilia RS125 doesnt start


Hi .... Try switching the petrol off just prior to stopping the engine and start up again with the petrol OFF. There's enough petrol in the carb to start the bike. A good battery should show over 12 volts. Take the plugs out and give them a good clean or replace them. Is there a petrul pump fitted ? A two stroke needs to be ridden quite hard to maintain efficeincy, higher revs etc ........ let us know how you get on ?

Dec 19, 2008 | 2006 Aprilia RS 125

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