Posted on 17 January 2010 by John
Too much choke can flood your Aprilia when you are starting it up.
Fixing the problem is easy
- Remove the seat from your bank
- Remove the bolt holding your tank in place and lift it up
- The HT lead is easily seen on the RS125 so take it off your plug and torque out your spark plug.
- Put your RS125 in second gear
- Keep your RS125 turned off and the clutch lever out
- Push your RS125 along (as if you were bump starting it)
- The cylinder will crank over and blow any excess fuel out of the cylinder
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Posted on 25 October 2009 by John
Reader of Aprilia Rs 125 Tuning Paul emailed to ask this question:
Hi John
I’m having a bit of a problem with my forks if i go over a bump or pot hole in the road i can here a clunking noise coming from the forks sounds as though they are bottoming out but not sure would you have any ideas
Thanks
Paul
I told him that I didn’t know the answer, but I would ask around. It appears that this problem is caused by the headstock, but the problem might be caused by the brake caliper being loose. First check that the rubber bushes on the brake caliper are in good condition and that there is minimal play in the caliper.
If you are confident that the problem is not being caused by the caliper, check if the headstock bearings and top yoke nut are tight. The stem and yoke bearings might need replaced, but the problem could also be caused if the stem threads on the top yoke are damaged. If the threads are damaged, it would cause the top yoke nut to come loose, even after being tightened.
Posted on 18 August 2009 by John
Reader Paul asked:
Hi John
I’m really impressed with your website i was paying for oil changes filter cleaning etc before i came across your site now i can do it myself saving a few pound in the process.Was just wondering if you could tell me how to change my front and back brake pads.
Many thanks
Paul
Its a pretty straightforward process:
- Pop the calipers off
- Remove the pin/split washer that keeps the retaining pin in place.
- Slide the pin out
- Drop the pads out
- Put the new pads in
- Reassemble.
Posted on 18 May 2009 by John
Paul emailed me last night and asked the following question:
Hi John,
Sorry to bother you i put engine oil in my two stroke tank on my aprilia I didn’t start the bike and drained tank straight away and filled back up with 2 stroke. Will this cause any problems?
Thanks
Paul
The engine draws oil from the tank using a small pump located at the top of the engine on one side. Since you’ve not started the bike up, no oil should have been drawn through it and you did well to drain it straight away.
The oil pump is designed to pump only two-stroke oil, which is of a different viscosity to gearbox oil. If you had started the engine up, the heaver gearbox oil could have overloaded the pump and caused no oil to reach the cylinder.
Engine oil is used to lubricate the gearbox internals, reduce corrosion, improve sealing and cool the engine. As there is no pump to move the oil around, and only the lowest parts of the gearbox being bathed in oil, a higher viscosity oil is required to ensure lubrication throughout the gear train.
Posted on 10 April 2009 by John
Diagnosing the problem when your bike won’t start can be difficult. Check out this guide for common reasons for the RS125 not starting. Work your way through the checklist from top to bottom.
RS125 Non-Starter Checklist
- If there is a nick in a tube or you have a leaky carburettor, your fuel could have escaped and evaporated over the course of a few hours (Lift your filler cap and check that there is fuel visible in your tank).
- Someone could have played with it since you last rode the bike or you might have forgotten.
- Put the bike in neutral and push along with your feet (or have someone push you).
- When you have reached a good speed, put the bike into SECOND gear and hit the starter button.
- If she starts up, pull the clutch in. The problem would appear to be in the starter motor.
- The starter relay can be found behind the radiator and the connection means that it is possible for wires to fall out of the unit.
- If you can bump start the bike and the wires are all connected, the problem could lie within the relay.
- Turn the engine over and make sure that a good volume of air is coming out of the exhaust.
- If possible, take it off the bike and look for blockages.
- Make sure the choke is not flooding the engine.
- Remove the seat and lift the tank up.
- Either remove the spark plug or take a good plug that you are certain work, and connect it to the HT cap.
- Touch the end of the plug to the frame via the insulated cap as you are in for a shock (haha) if you hold the plug itself.
- Hit the starter button and look for a spark.
- Check the original plug in the same way to make sure that it isn’t the source of the problem.
- Make sure that the HT lead sits snuggle onto the plug.
- Make sure that everything is plugged into the CDI as it should be.
- This is located underneath the pillion seat. Look for bare or cut wires.
