Question about 2005 Aprilia RS 125

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Aprila 125 rs 2005

Hi,i have just rebuiilt engine put ngine back in frame it started up great, turned it off put petrol tank back on wouldnt start not even a spark now when i put the key in i here a bleeping noise from the emobilizer could this be the problem i havent got a spark thank you colin

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The rebuilt NGINE worked great as you said. The line could have an air gap and need flushing. Check the plug and see if it has deposits or oil on the contact. Clean and gap properly. Check the electrical system to see if your getting a spark.

Posted on May 09, 2014

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Posted on Jan 02, 2017

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SOURCE: aprilia rs 125 starting problem

First check the battery to see its still fully charged. If it is do a voltage drop test between the battery and the starter to check for a bad relay or open circuit. If that checks out, you very likely have a bad starter/solenoid. I can explain how to do these tests if u need me to

Posted on Nov 26, 2008

  • 298 Answers

SOURCE: rs 125 wont redline.....please help!!! PLEASE.

there's a rev limiter . Im not sure of your bike model but a simple google might help.

Posted on Mar 15, 2009

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SOURCE: vespa et4 125 cuts out after starting and riding for a few yards

before buying a new HT coil (as these are generally bullet proof on an et), remove the inspection panel and disconnect the spark cap. secure something long, thin and metal into the cap ( screw, tweezers, etc) and position it with a slight gap to the frame. disable the immobiliser and use the kick start. you should see the spark jumping from the metal to the metal frame. I fyou see this spark, it is most likely that the HT coil is fine.

Sometimes the diaphragm in the fuel tap can go wonky on an ET also, meaning that it might start alright but after going for a while, once the carb drains, the engine will die from fuel starvation. to test the fuel tap, remove the 2 tubes that run from the fuel tap to the carb at the carb end and **** lightly on the thin one. you will feel the daphragm open and fuel will run from the fatter tube if it is working.

Another thing that might happen if it is running for a while then dies is that the carb might be allowing too much fuel to the engine and flooding it. If when it restarts, there is a lot of smoke from the exhaust it could indicate this. leave it tick over for a while to run off the worst of it then increase the throttle slowly until you hit full throttle, leave it run back down to idle and you should be set to go. only use the throttle lightly and go slowly and it should bring you home at least then adjust your carb.

Posted on Aug 23, 2009

ollie reece
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SOURCE: cannot start aprilia rs 125, seems battery is dead but just drove

well thats the battery i guess its not turning the engine over fast enough for it to fire also try bumping it in 2-3 gear if it starts you know ya problem battery if it still doesnt go get back to me buddy

Posted on Sep 09, 2009

ollie reece
  • 1167 Answers

SOURCE: aprilia rs 125 wont start,spanner on display

tilt tank back and look at the spark plug clean it aswell then try it get back to me if not ok also i have amanual i will look for the spanner tomorrow night buddy

Posted on Sep 23, 2009

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With apprila Rs 125cc 2 strokes bike. I fill up with 98 octane unleaded and I poured 2 strokes oil Into petrol tank. is it possible can damage the engine?. at the moment I couldnt start the engine.

well you cant damage it by doing that but if you put too much n and didnt shake it well it will settle at the bottom of the fuel tank and fill the carburettor up with oil as oil is heavier than petrol.why are you not using the oil tank and oil pump fitted to the bike ?best thing to do is put a new spark plug in it turn the fuel tap off roci the bike bacwards and firwards to mix the oil and fuel in the tank,and drain the carburettor by undoing the 14mm nut in the centre of the bottom of the carb,then turn the fuel back on and try and start it up.

Dec 10, 2015 | Motorcycles

1 Answer

Aprilla rs 125 1998 will only start when i put petrol where sparkplug sits

Hi, Angiep10 and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
DOWNLOAD 1998 Aprilia Rs 125

Feb 07, 2013 | Aprilia RS 125 Motorcycles

1 Answer

My aprila leonardo 125, takes ages to respond to the throttle when 1st started. then takes ages to reach 50mph. iv been told the carb needs cleaning, bu then heard it could be a crack in the air in take...

Hi, Danny and the usual suspects are:
1. Throttle cables misaligned or misrouted (may also affect idle speed).
2. Damaged or restricted fuel tank venting system.
3. Inlet system air leak.
4. Vacuum piston malfunction.
5. Accelerator pump leaking or no output.
6. Plugged bowl vent.
7. Fuel level in bowl too low.
8. Restricted fuel supply passages.
9. Plugged jets or passages.
10. Worn or damaged needle or needle jet.
12. The enricher valve not seated or leaking.
For more information about your issue please visit the websites below. Good luck and have a nice day.

Aug 04, 2011 | 2005 Aprilia Leonardo 125

1 Answer

Were is the battery on a aprillia 125

unscrew and lift the petrol tank and you will see the battery if it's the same as my sons 2005 you will need to losten the water bottle to remove the battery.

Apr 18, 2010 | 2006 Aprilia RS 125

1 Answer

De-restricting aprilia rs 125 (jetting)

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

Nov 11, 2009 | 2007 Aprilia RS 125

2 Answers

Cant get aprilia rs 125 started

You need to box that thing up and ship it to me immediately. I will get to it and back in your hands no latter then say......2012...2013 at the latest.

Pull your plug after you try to start it. What does it look like? If it's wet your problem is flooding, electrical or bad fuel. If it's dry your not getting fuel.
After you check the plug please repost here with what you find and I can help you out with a more specific cause.

Oct 27, 2009 | 2000 Aprilia RS 125

1 Answer

I need to get to carbaretta to clean but cant lift petrol tank due to petrol pipe connected. how do i turn off petrol

there is no valve to turn off on modern bikes. you will have to syphon off petrol into a safe container and can pinch hose with a small pair of mole grips or bend hose back 180 degrees and put a rubber band on

Sep 22, 2009 | 2006 Aprilia RS 125

2 Answers

DT 125 2000 Very poor starter. Stolen recovered so no ignition

had exactly the same prob with my dt 125.

In the fuel tank there were two filters that had become a little blocked with small fragments. I replaced both of these, aswell as the petrol tank and now works perfectly.Worth replacing with every service.

Also make sure the amount of fuel to oil is correct because if there is too much oil it leaves a small layer of oil on the spark plug which gets thicker when the engine cools. When you dip the spark plug in petrol and put it back in it obviosly makes a large enough spark to remove the oil, but repeats itself when the bike cools.

Hope this helps


Apr 15, 2009 | 2000 Yamaha DT 125 R

1 Answer

Bke wont start

Hi there, try this sometimes the stand switch can make the bike not work if has got rusted at the back.and check or replace the coil., then check if you are getting a spark from the plug by putting the spark plug on top of the head. The next thing is if the bike turns over but not fire up, you need to strip down carb and clean jets, also check petrol value under the tank If you have a book it will go through this step by step. good luck.

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1 Answer

Kawasaki kmx 125 2002 wont start

To me I want to know how old that gas is. If it smells like old paint or stale at all you need to rid the complete system. Then you need to take your carb. off and take it apart and clean it and all the jets, since you said there was sand in the gas tank.

Jan 05, 2009 | 2002 kawasaki KMX 125

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