Question about 2003 Aprilia RS 125
Hi can anyone help? I have recently bought an 2003 Aprillia RS 125 it has been running perfectly and still is. The compression seems fine the bike runs and ticks over without any strange noises. The previous owner used to push start it as he bought it without a starter motor on it. I recently bought a replacement starter motor and then found the Bendix was faulty (Bendix is a separate unit fitted inside the engine on the 125) I got one and fitted it by removing the flywheel. The engine turns over on the button but wont fire up. there is a spark at the plug (which is clean and new the bike starts dead easy with a push (I must admit this has got me scratching my head as the battery is fully charged and brand new) the battery is a Varta 12v 9ah battery (would a more powerful battery help?)
Hi, Malcom Smith famous dirt bike rider extraordinaire and the usual suspects are:
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Discharged battery, needs to be 12.5 volts or better and be able to pass a "LOAD" test if necessary.
4. Check the 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.
5. Tip over sensor needs a reset.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand or clutch pull in switch/sensor.
9. Starter control circuit, relay, or solenoid faulty.
10. Main fuse or circuit breaker may be blown or faulty.
11. Check for engine trouble codes.
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.
APRILIA RS 125
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APRILIA RS 125 2006 Manual
Posted on Mar 18, 2017
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Posted on Jan 02, 2017
SOURCE: bike wont start
I would check for compression on the cylinders. a engine has to have fuel,fire and compression or it wont run. Check the specs to get the operable compression levels.
Posted on May 27, 2009
Check to make sure your getting gas by pulling off the hose, if no gas comes out your petcock is clogged. If this is the case blow air up into the hose, and if gas comes out now your tank has to be cleaned out.
Posted on Jun 23, 2009
SOURCE: 2003 Heritage Starter Problems
I have an 03 FLSTC, same issue. Went through four starters before 70k miles. Problem solved when I had both the gear reduction and compression releases installed. Have 40k miles on my fifth starter and no problems.
Posted on Jul 26, 2009
you have too much fuel going into to cylinder if backfiring on carb there are 2 screws one for idle and one for mixture the mixture screw is the one you want turn this in 1/2 off turns or more if doesnt help this picture will help buddy
Posted on Sep 08, 2009
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