Question about 2003 Yamaha YZ 250

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CARBURATOR SIZE I was given a Yamaha Timberwolf 2wd (unk year) with some major carb problems. Allegedly the carb was rebuilt but still has issues. I do not want to invest a ton of money and figured I could just buy an aftermarket carb and that would hopefully get this thing up and running. Do you guys have any idea what the OEM size would br for the bore and spigot mount. Can you also suggest a decent aftermarket product. Thanks

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  • joe May 11, 2010

    have you tried a motorcycle salvage yard for the same carb?

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Get the VIN number for the bike and ask the local yamaha dealer. (the VIN number has a code for the year in it) what was originally on it when new. and what can fit on it from the aftermarket products.

Posted on Mar 14, 2009

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Need to find model number to order parts


92-2000 Timberwolf YFB250 all use the same air box, this site gives you all the details you should need

http://www.cmsnl.com/search/index.php?spbmbrand=YA&spbmmodel=Timberwolf++250&spbmvin=

Dec 29, 2015 | Yamaha Timberwolf 250 2wd 97 Airbox Air...

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Yamaha Timberwolf. How can I find model number to order parts


If you can tell me your vin - or your year I can tell you what model you have. But - if you go onto any parts site - such as cheapcycle.com or partsmonster - you name it - you won't need your 'model' # - just your year. You'd click - Yamaha OEM Parts, then ATV then Year - 1992 - 1998 was the Timberwolf - a lot of parts from the 99 - 04 Bear Tracker will work (just about only changed the plastics and carb in 99 - 04) same engine/transmission/rear end, etc. the brakes also went from drum to disc - but you'd click on the year - and then look - the timberwolf will be right there the 1992 - 1998 Yamaha Timberwolf 250 - I can't remember if they offered a timberwolf 350. If you can tell me the vin or year - like I said - I'll reply with your exact model # - but you can buy and order most parts just by model name and year 95 Timberwolf.

Dec 29, 2015 | ATVs

1 Answer

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

1 Answer

'92 yamaha timberwolf valve adjustment


Here's the info you're looking for.

1992-1998 Yamaha Timberwolf 2WD and 4WD
Intake: 0.05 - 0.09 mm (0.002 ~ 0.004 in)
Exhaust: 0.11 - 0.15 mm (0.004 ~ 0.006 in)

Jun 20, 2014 | RTO 200cc Full Size Four Wheeler ATV

1 Answer

Dies when you turn off the choke


sounds like you have an air flow issue,remove carburreter strip andclean with carb cleaning spray and an airline. Check float height adjustment, once everything has been reassembled, refit carb, prime with fuel and JOB DONE

Mar 05, 2013 | Yamaha Timberwolf 250 2wd 97 Airbox Air...

1 Answer

Gas pouring into the air box .


The 24mm Mikuni carburetor float is stuck to on position.
Replace the float and clean the fuel bowl will fix the problem.


Yamaha Timberwolf 2x4 Specifications Off Road com

Oct 04, 2012 | Yamaha Timberwolf 250 2wd 97 Airbox Air...

1 Answer

Yamaha timberwolf wont start unless push started


You have a loose connection to the ignition system . When cranking make sure it is in neutral. and kill switch is in run position. The only thing dropping would sensibly affect is the fuel system or jarring a switch., but with the suspension you have there really is no jarring. So, I would ck the wiring. something is loose.

May 29, 2009 | 2003 Yamaha YZ 250 F

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