Question about Aprilia RX 125 Motorcycles

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Aprilia RX50 loses power after 5 mins running. Can you help.

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  • Aprilia Master
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Hi Johnj_jackso, you may have squeaked your top end this is commonly known as "HEAT SEIZE" the piston heats up expands and becomes extremely tight in the cylinder bore and usually occurs mainly on 2 cycle engines right after a fresh top end rebuild, but it can also happen to brand new motorcycles, but these are rare instances due to better quality control and education. The usual suspects are:
1. Improper oil/fuel mixture ratio.
2. Faulty or improperly adjusted oil pump and or cable.
3. Among the causes of lack of cylinder oil is clogging of lubricator by dirt or waste, obstruction in oil pipes, leaky check valves, leaky pump packing, broken oil pipe, oil too cold to feed, lack of oil in the crank case.
4. Wrong type of oil used in mixture or pump.
5. Failure to follow proper break in procedures.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
https://www.tradebit.com/filesharing.php/search/0/aprilia+rx+125+motorcycles

Posted on Oct 18, 2015

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Posted on Jan 02, 2017

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SOURCE: ktm 50 runs good at first then lacks power

weaken the fuel mixture - is it air cooled? sounds like over heating

Posted on Apr 01, 2009

rzman
  • 148 Answers

SOURCE: How do I replace clutch on aprilia rx50?

you will need new clutch plates and side cover gasket,,,remove the side cover,undo the pressure plate bolts and the pressure plate will come off,then pull out the old clutch plates and steel plates and fit the new ones in the same order as you removed the old ones

its an easy job you can do it

Posted on Mar 20, 2011

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I'm having problems with my aprilia rx50 (2008), it ticks over but when I knock it into first and slowly release the clutch it pulls about a metre then the engine loses power and cuts out ! Any ideas


Hi Anonymous, the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or damaged battery, 9 volts or lower.
2. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
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10. Fuel tank empty.
11. Gas cap is not venting properly or fuel tank venting system blocked.
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13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
For more information about your issue, please visit the websites below. Good luck and have nice a day.
DOWNLOAD 2008 Aprilia Rx 50

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Hi i have an aprilia sx 125 it is a 2010 model and i bought it a few weeks ago it came with the warranty book but no service stamps in it. My problem is that when running the bike mainly in 4th gear at...


Hi, Dunhills and the usual suspects are:
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2. Dirt, rust, water, or ethanol sludge in the fuel system.
3. Sticky throttle cables.
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5. TPS sensor out of adjustment or faulty.
6. Wrong spark plugs for the type of service.
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8. Faulty O2 sensor.
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10. Aftermarket components not compatible with ECM.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

How do I replace clutch on aprilia rx50?


you will need new clutch plates and side cover gasket,,,remove the side cover,undo the pressure plate bolts and the pressure plate will come off,then pull out the old clutch plates and steel plates and fit the new ones in the same order as you removed the old ones

its an easy job you can do it

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I need to know how to completely strip my aprilia rx50 forks can you help?


Hi Sherbz18, 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.
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Hi Aitchmere, for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix/test or parts inquiry. If necessary transport your vehicle to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. For more information about your issue please visit the website below. Good luck and have a nice day. DOWNLOAD 2008 Aprilia Rx 125

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Ktm 50 runs good at first then lacks power


weaken the fuel mixture - is it air cooled? sounds like over heating

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