the bike starts and runs for a couple of minuites then dies, it uses the furl in the carb and dies. it will only start again with choke on and if you shake the bike, as soon as you stop shaking the bike or turn the choke off it dies, i have replaced the carb and problem persists, seems like lack of fuel, any ideas?

ceuron williams, April 2008

Hiya I have an aprilia rs125 02 had and 05 bottom end on it ok let me get to the problem I start the bike its fine then after a few minutes it splaters on 6000rpm sometimes in gear 1 it goes to 8000rpm if you keep trying I have checked the reed valve I honestly have no idea someone help please

peter, April 2014

Hiya I have an aprilia rs125 02 had and 05 bottom end on it ok let me get to the problem I start the bike its fine then after a few minutes it splaters on 6000rpm sometimes in gear 1 it goes to 8000rpm if you keep trying I have checked the reed valve I honestly have no idea someone help please

peter, April 2014

Hi I've got a aprilia rs 125 2005 model its been stood for about 3 months and now when I go to start it I will start but after a munuite or so it will cut out and will take ages to start agen and if I rev it I cuts out does anyone no what's the matter plzz help

bengray, March 2013

burn it

steve, December 2010

The spluttering happened on my bike between 6000-7000 rpm in turned out to be that the bike needed a power valve, this might be your problem.

chris, May 2009

I had this problem, I tryed everything and it just turned out to be stale (old) fuel.

Chris, May 2009

hi my rs goes to 7000 revs then splutters and does not wanna go any idears wat it could be ive had the carb cleaned aswell

rhys125, March 2009

I have experienced this on several occassions and with 2 different rs125s. Usually, but not always, it occurs if the bike has not been used (even after a week or so). The problem occurs with the fuel that was sat at the alumininium fuel tap - seems to form into a small solid grain for some reason and this can fully or partially restict fuel supply. The fuel galleries are very small here and the problem can show its self even if you change the fuel tap to the reserve position.

As a last resort you can empty the fuel from your tank and strip and clean the fuel tap (a pain in the backside) - however I have developed a neat trick so that a stip down is not required.

Apart from the fuel hose going from the fuel tap to the carb there are 2 other hoses comming from the fuel tank. One is the overflow the other is the vent. You will find the ends of them usually sticking out down either the left or right side fairing (depends who has routed them). You need to find the open ends of these hoses and identify which is the vent. The easiest way to do this is to blow into each, one at a time, firstly with the fuel filler cap closed and then with it open. The vent is the one which gets a lot easier to blow when the cap is open.

Great! Now you have found the right hose. Close the filler cap fully, close the fuel tap. Blow (with your mouth only) as hard as you can until you feel the pressure begin to build up in the tank - now open the fuel tap whils the pressure is held in the tank. Stop blowing, wait a few seconds and start your bike. The blockage hopefully should have cleared. The blockage occurs at the inlet to the tap porting so once it has cleared then both main and reserve will work again.
It has worked for me each time so I hope it works for you.

Good Luck!!
Keith.

Keith Brown, July 2008

check your fuel filters one in carb one in tannk

satan, May 2008

try turning the idle nob on the right hand side of the carburettor there might be too much air getting in. if this does not work remove your carb and take it too bits clean it then put it back together pay particular attention to the little needle on the bottom of the carb

Ryan, May 2008