How Do I Get My Aprilia Rs 125 To Start?

Do you have compression, if not then you will need to have a top end rebuild. I had the same problem as you because my Powervalve Blade snapped and took a couple of piston rings with it and lost all compression.

Richie
December 2010

unfortunately thats a classic symtom of low compression especailly the fact it chuffs out of the exhaust and the fact that it wont tick over.i would say the best thing to do it take the head and barrel off and have a look at the piston and the barrels plating inside as i would imagine its not pretty,also make sure the powervalve isnt broken as this is one of the classic problems of the rotax 122 and 123 engine that they use.you could if you want take the exhaust off and have a look up the port and see if there is any scores on the piston there the exhaust will have to come off either way anyway.

adam bike doctor
April 2010