Question about 1998 Aprilia RS 250

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Splutter Problem I have a problem with my 1998 Aprilia RS250, when I open up, as the bike hits power band it starts to splutter. When I change too third it starts coming right, what can it be.

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Posted on Feb 09, 2009

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Runs for a while then starts spluttering

Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Damaged or restricted fuel tank venting system.
4. Dirty or damaged air cleaner element.
5. The accelerator pump is inoperative.
6. Vacuum piston assembly malfunction.
7. Enrichner valve is not seated or leaking.
8. Restricted fuel supply tract.
9. Plugged bowl vent.
10. Loose or plugged fuel and air jets or passages.
11. Improper fuel level.
12. Worn or damaged needle or needle jet.
13. Loose or plugged main jets or passages.
For more information about your issue please visit the websites below. Good luck and have a nice day.
DOWNLOAD 2007 Aprilia Sportcity 250

Mar 20, 2013 | 2007 Aprilia Sportcity 250

1 Answer


Hi, What Fuel/oil ratio are using?

I'd strongly suggest 40:1 with fully synthetic 2T oil and premium fuel.

How is the bike's compression? It should be165-215PSI. If it is less than this install new correct size piston and rings and use new gaskets.

If the bike is still splutter and blowing lots of smoke then raise the main jet needle by one notch.

Dec 12, 2012 | 2000 KTM EXC 380

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Why does my DT125 splutter at hight revs

Sounds like either the bike is starving for gas at higher RPM's, or you're hitting the rev limiter.

Jun 15, 2012 | Yamaha DT 125 R Motorcycles

1 Answer

My 1990 aprilia af1 futura seems to splutter and there is a loss of power at high revs. this happens between about 8500 & 10,000 revs ,when the red line is @ 11,500 through 13,000 . the bike is a full...

Hi, Tanita and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question please visit the website below. Good luck and have a nice day.
841 af1 rs manual zip 805 KB

Mar 25, 2011 | 1990 Aprilia AF1 125 Futura

2 Answers

Cpi sm 50 engine has been rebuilt. i have fitted new auto choke,new battery. carb has been stripped and cleaned, slightly bent the float to allow more petrol in thinking the bike might be starved of...

Hi Gusowz, put the throttle needle and float height back to their original position, I am sorry you can't find the first and best tool you ever bought for your Aprilia but despair not for a mere $10 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.

Sep 05, 2010 | Aprilia RX 125 Motorcycles

3 Answers

Bike boggs down no powerband rm 250

i have a 92 rm 250 an i just had it fully rebuilt an it laggs in power band an splutters an feels guttles

Oct 09, 2009 | 2003 Suzuki RM 250

1 Answer

1999 Aprilia RS250 won't come up to proper temp.

hi mate when you put the coolant do you bleed the system to get the air out of the cylinder

Aug 25, 2009 | 1998 Aprilia RS 250

2 Answers

2008 Derbi Cross City 125 running problems

if you turn a motorbike tank into reserve..
the patrol wont go to a little filter.. soo.. thats the splutter and so..

Jul 10, 2009 | 2008 Derbi Cross city

1 Answer

1998 Aprilia RS250 Still Spluttering

Hi and welcome to FixYa,

Your described problem could be the battery but I am also inclined to suspect the voltage regulator. If the 'splutter' is when revving/higher RPMs, then the CDIs are cutting off possibly because of higher than normal voltage from the regulator and/or the battery is not loading the system(charging). Try charging the battery externally for at least a couple of hours, try and observe. You can also have the battery tested. If the battery checks good, accepts a charge and the bike will run normally after being charged, then the regulator must be considered.

Good luck and thank you for using FixYa.

Feb 11, 2009 | 1998 Aprilia RS 250

1 Answer

Spluttering in mid revs.

Hi ....... The excuses you've been given might hold up either in Oz or tibet but as you say in Ireland it doesn't quite hold water.
Has anyone changed anything ? Pipe, airfilter, ignition ? The fact it takes off in the powerband show it's either not too bad or you've been luckey not to hole a piston. Try removing the spark plugs and note the colour, any colour other than a light tan is NOT correct and indicates fuel mixture as too lean/white (too much air) or rich/black (too much petrol). Too rich is preferable to too lean as being lean will hole a piston, burn out a valve or a partial/full seizure. Dependant on colour I'd then LOWER the circlip on the carb needle.
Let me know how you get on.

Dec 10, 2008 | 2008 Aprilia SX 125

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