Question about 2003 Yamaha YZ 250

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98 Timberwolf will not idle and has a rolling rattle sound in crank case sound dose not change when you throttle it up

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Sounds like a piece of metal which could be a bearing ball or some roundish object which is making the sound by rolling in the sump. Drain the engine oil to check otherwise the engine cam has to be exposed for checking. Also it must be causing a jamming effect thus when it tries to idle, it effectively causes the engine to stop. Anyway the engine has to be opened to rectify it..........sodeep

Posted on Jun 28, 2009

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Yamaha Timberwolf. How do I find model number to order parts?


I apologize - my answer to the previous question didn't really clarify your actual question - Your VIN can be found along the frame rail - left hand side - about a foot or so ahead of your left foot guard -

26028714-jbdqfs5232kzbw0rj532ox50-2-0.png

If it's still there - your model number is here:26028714-jbdqfs5232kzbw0rj532ox50-2-2.png

If you can read your VIN - and here's a tip to know you're getting the whole number and it's not rusted away a digit; your second digit should be a (Y) - if you write down your VIN, second digit is Y so you know the placement is right - the 10th digit is the year. And here are the breakdowns for that 10th Digit:

(For all Yamahas - not just the Timberwolf):
88 - J, 89 - K, 90 - L, 91 - M, 92 - N, 93 - P, 94 - R, 95 - S, 96 - T, 97 - V, 98 - W, 99 - X, 2000 - Y, 01 - 1, 02 - 2, 03 - 3

From 1992 - 1998 the Yamaha 250 4-stroke, shaft drive, trail bike was the Timberwolf.

From 1999 - 2004 the Yamaha 250 4-stroke, shaft drive, trail bike was the Bear Tracker.

*****SAME ENGINE, SAME TRANSMISSION, SAME REAR END, TIRE SIZE, PULL START - THINGS THEY DEFINITELY CHANGED IN 1999 WHEN THEY STARTED CALLING THEM THE BEAR TRACKER: - PLASTICS BECAME A LITTLE LONGER I BELIEVE; AND THE SEAT WITHOUT A DOUBT BECAME LONGER. THE CARB WENT TO A CONSTANT VACUUM - INSTEAD OF THE SLIDE CARB WHERE THE THROTTLE CABLE WENT THROUGH THE CAP LIKE THE TIMBERWOLF. HARD TO REMEMBER - BUT I THINK THE TIMING CHAIN TENSIONER BECAME UNADJUSTABLE - AND NOT MUCH ELSE CHANGED. IN 99 THEY EVEN KEPT THE BRAKING SYSTEM THE SAME. SOMETIME AROUND 2000, 01 OR SO THE BRAKE SYSTEM CHANGED FOR THE FRONT WHEN YAMAHA WENT TO DISC BRAKES. HOPE THIS HELPS. ANYTHING ELSE YOU NEED TO KNOW ABOUT YOUR TIMBERWOLF JUST LET ME KNOW - I'VE OWNED, REBUILT, BOUGHT, SOLD, TRADED A TON - I'VE CURRENTLY GOT A 99 BEAR TRACKER THAT IS THE MOST DEPENDABLE 250 4 STROKE I'VE EVER OWNED AND A 1996 YAMAHA WOLVERINE 350 4X4 - I'VE REBUILT THEM FROM THE BOTTOM TO THE TOP. THOSE BIKES ARE GOLDEN IF YOU TAKE CARE OF THEM AND DO A LITTLE ROUTINE MAINTENANCE. ALL THE BEST - JUSTIN MCCARTNEY

THE 99 I MENTIONED THAT I STILL HAVE:
26028714-jbdqfs5232kzbw0rj532ox50-2-5.jpg

A 98 I BOUGHT WITH THE ENGINE IN A MILK CRATE THAT I BOUGHT, REBUILT & SOLD:
26028714-jbdqfs5232kzbw0rj532ox50-2-9.png

A 2004 I BOUGHT, REBUILT AND SOLD:
26028714-jbdqfs5232kzbw0rj532ox50-2-14.jpg
All the best - let me know if you're ever in a jam with yours; not too much I haven't seen, fixed or had to deal with.

Dec 29, 2015 | ATVs

3 Answers

Why does my 98 ford explorer eddie bauer cuts off when i stop


In most cases as mentioned above the IAC can contribute but in your case sounds like your Throttle Control Position Sensor Switch eith er has a bad connection or the switch is bad all together. they are betwen 25 and 40 dollars any parts store stocks it.
25756998-3h3vbvy41etzwoijvymmsxyb-1-0.jpg

Jun 22, 2015 | 1998 Ford Explorer

1 Answer

1 2 vw passatt


There is not much to come loose there because the suspension bolts are typically torqued tightly. Does this rattling only occur when the car is rolling, or will it happen at idle. Assuming it is when rolling, I would recommend having someone drive the car on some bumpy road and run beside the car to get an idea where the sound is coming from. There is just too much insulation in the car to get a good feel for it. Also, do you hear it if the window is down, or just with the window rolled up. I would make sure that your coolant reservoir is held tightly with the 3 screws that hold it on. It is possible that the person who last did your oil change did not reattach those screws (the reservoir has to be removed to get access to the oil filter). Maybe post more information with information about when you hear the rattle, and where it sounds like it is coming from. I have often found issues running beside a car. If it is a constant clicking sound, then it may be a failing CV joint.

Apr 06, 2014 | 2003 Volkswagen Passat

1 Answer

98 eclipse 2.0 idles high at 2500 rpms an I just replaced the throttle positioning sensor


sounds like you may have a vacuum leak. any air entering engine not passing through the throttle body will cause engine to race. a whistling sound is sometimes a sign of vacuum leak but not always audible. propane is the recommended method finding leak but I find this unreliable. spraying carb cleaner around suspect areas and listening for a rpm change is more successful. just remember carb cleaner is extremely flammable and caution must be used.

Apr 08, 2013 | Cars & Trucks

2 Answers

Yamaha timberwolf 250


My 1994 Yamaha Timberwolf starts but won't idle properly. Sometimes when it quits it backfires. What could the problem be?

Aug 13, 2009 | 1996 Yamaha FZX 250 Zeal

2 Answers

2000 Suzuki esteem wagon, rpms race when car is rolling


check the throttle position sensor. that should be whats wrong.

Jul 22, 2009 | 2000 Suzuki Esteem

1 Answer

98 Timberwolf will not idle and has a rolling rattle sound in crank case sound dose not change when you throttle it up


It needs a doctor - it's a '98 two stroke - when was the last time the seals and bearings were replaced?

Jun 28, 2009 | 2003 Yamaha YZ 250

3 Answers

Cra wont stay on


It seems like ther is a problem with your gas pump, it doesnt seem to be pumping the fuel through your engine like it should, try replacing that and see what happens.

Wayne

Jun 26, 2009 | 1989 Cadillac Sedan DeVille

3 Answers

Won't idle steadily


Check the rubber boot that joins the carby to the engine to often have seen the hose clamps over tightened therefore creating a split in the rubber letting to much air in giving the rough idle eventually you wont be able to start it at all (have a good thorough look inside an outside of boot doesnt take much)

Nov 12, 2008 | 2003 Yamaha YZ 250

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