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

Posted on Jun 28, 2009

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SOURCE: 98 Timberwolf will not idle and has a rolling rattle sound in cra

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

2006 Dodge Stratus Noises


It sounds like you have a new old car!!! Noises could be so many things, but since you mentioned you had a muffler replaced, my first suggestion would be the exhaust pipe or new muffler is too close to a frame or out of line. Put car up high enough to where you can roll all around the undercarriage. Start the car and let it idle while you roll around looking and listening, and you will have a 90% chance of isolating your annoying rattle. Good luck!

Mar 28, 2014 | Dodge Stratus Cars & Trucks

1 Answer

2005 Mercury Grand Marquese accellarator not accellerating motor


Check idle speed, air flow speed, oxygen sensors . Check fuel manifold pressure. If the engine runs ok but will not rev up check the cat converter by hitting with the heel of your hand and listening for rattles as they are prone to failing and blocking up the exhaust system which stops the motor from accelerating

Feb 15, 2013 | 2005 Mercury Grand Marquis

1 Answer

I have a 98 ram 1500 with a 5.2L and 2wd. I recently changed my timing chain and gears because truck wasn't running right. Now it idles up and down crazy. Backfires and sounds like ****. The timing was off...


scan truc with a tech ll that runs a data stream--cause u need precise readings--inspec throttle body and idle air control-may need cleanin--hows the thermostat-its crucial for correct operation

Apr 05, 2011 | 1998 Dodge Ram 1500 4WD

1 Answer

The bike idles and runs great at idle but if I rev the engine and let go of the throttle there is a little rattle. Also if i crank the throttle it will rev to around 7500 and at wide open throttle the rpms...


the rattle may just be vibration or a failin bearing-old bike--carb shud be takin apart-cleaned-and ajusted if problems get worse--buy a repair manual thats what the pros use

Apr 10, 2010 | 1984 Honda VT 500 C Shadow

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


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

Jun 28, 2009 | 2003 Yamaha YZ 250

1 Answer

98 GMC k2500 7.4L Rouch Idle


TRY THIS BEFORE U SPEND ANYMORE MONEY N PARTS.
Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

May 22, 2009 | 1991 GMC K2500

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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