Question about 2005 Yamaha WR 250 F

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2007 wrf250 loosing power similar to running out of fuel

My wrf250 looses power it feels like the fuel is running out but the carby has been cleaned already and a fuel filter has been fitted jets have also been checked dealer thinks it could be the stator or the cdi the coil and spark plug is are ok can any one help on this problem

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Hi and welcome to FixYa,

Initially, pls try without the fuel filter and replace the fuel hose with bigger inner diameter.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 20, 2008

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Posted on Jan 02, 2017

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3 Answers

'89 FXR. Starts fine, but why does it die after a few secs?

Hi, Eric the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, 9 volts or lower.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture ***** improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please visit the websites below and for specific information or questions, please feel free to contact me at Good luck and have a nice day.
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Mar 18, 2016 | Harley Davidson Motorcycles

1 Answer

My bike sat for a couple months, now I need to know How to drain the gas

Disconnect the fuel line at the carby with fuel tap off. Put loose end into a container and turn on fuel tap. ( doesn't make a big mess that way) now you wait until it's empty, refill tank, flush fuel line a little, reconnect fuel line, then you might need to drain the fuel bowl on the carby as well using the screw to one side ( the bottom one removes the fuel bowl, you only want to drain it) DONE!

Sep 06, 2015 | 2007 Yamaha V Star Custom

1 Answer

Yamaha yzf 750

coils may be overheating and loosing ability to function. How ever I would first check to see that the fuel cap is venting properly as it sounds like a vacuum forming in the tank and not allowing proper fuel flow to the carbys

Jul 04, 2013 | Motorcycles

2 Answers

Bike chokes down after throttle is open past 20percent things i checked cleaned silencer cleaned intire carb things i havent checked fuel cutoff solenoid ex.port valves thrttl position sensor

hi ,
Is your carby well fixed? If your air intake is too big ,the bike will not run properly .
Make sure the carby is not taking additional air or not enough .
Clean the air filter , tune the carby with the mixing screw air/fuel

Jul 13, 2010 | 2004 Yamaha YZ 250

1 Answer

Why does my motorcycle stall when i slow down and dies when im riding normal speed after like 15 sec into the ride and it doesnt seem like its getting all of its power when u gag on throttle

Your fuel petcock (on/off tap) may be restricting fuel flow and the carbies may need to be cleaned.
To maximise fuel flow thru a dirty fuel filter or restricted fuel flow thru a contaminated carby jet, disconnect fuel hose from tank and drain remaining fuel in carbies into a glass and inspect for contaminates. Take off float bowls and spray ($8 retail 400g aerosol spraycan carby cleaner) cleaner down fuel line/hose until it pours out of carbies. Allow to evaporate. Replace fuel filter (there may be a cylinder of white mesh gause inside of fuel hose) and check bottom of tank for rust, scale or debris. Try fresh fuel, new sparkplugs (0.8mm gap) and ensure choke is functioning correctly. Check camchain tensioner is not loose. Keep battery fully charged, replace if the bike can't achieve this when running with no lights.. This link will give you diagrams to help you out.

May 08, 2010 | 1979 Honda CX 500 A

1 Answer

My tiger 1050 wont start, plenty of power in

I would first fill the tank with fresh fuel especialy if the bike has stood for any length of time also determine as to wether or not fuel is actualy reaching the barrrels remove the spark plugs & check if they are wet or dry if they are found to be dry open the drain plugs on the carby float bowls if fuel runs out of the drain it must be asumed that your broblemis carburation & will require the carbies to be removed stripped & cleaned this will involve the removal of all the jets the float & the needle & seat once these have all bean cleaned thoroughly [compressed air is usefull for this part of the operation] &reasembled return them to the machine &

Feb 20, 2010 | 2007 Triumph Tiger

1 Answer

Got a arquin 250 motor bike ,starving for fuel ,and running really rough loosing power .when i go out it for hour its fine then its plays up real bad .is it the carburetor????

It will be the carby, it sounds like either you have got some dirt in the jets which need cleaning. It is either that or you have got some bad fuel from somewhere. It would be an idea to fit a fuel filter to capture any rubbish picked up from Service Stations. Firstly though a thorough clean of the Carbies would be the go.

Oct 24, 2009 | 2004 Suzuki VL 250 Intruder LC

1 Answer

Hi, This is probably a simple question but it has me baffled. I bought a cx500 1981 custom last week and I have had a couple of teething problems. The main one being that she looses power - at full...

you definately have a fuel problem .
clean your tank first as deposits in the tank might have made way to the carbi .
the fuel/air mixture is one thing but your bike may have also oil burning issues .
try first by making sure the carbies are clean , fuel tank clean , the air mixture adjustment is tricky but usually screw the air mixture screw on the carbi all the way in and undo it 1.5 turn back and no more .
try that first and see how you go . the vaccum menbrane in the carbi may be defective too and may have to be changed .
have a look at all that and see how you go

Sep 26, 2009 | 1981 Honda CX 500 B

1 Answer

Carbies willn't set float level,right floods,left sets to low

I don't know if its any help but I've fixed my Honda with similar problem. It turns out I reassembled the rich carbys air cut off valve incorrectly. Have you checked yours? I'm wondering if the cut off valves somehow affect the other parts of the carbys. Mine is running sweet now.

Apr 13, 2009 | 2001 kawasaki ER-5

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