Question about 2003 Yamaha YZ 250

1 Answer

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

Posted by on

  • joe May 11, 2010

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


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 373 Answers

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

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Engine number 4BD-211821 need to verify size and year

Hi, Gary this was a tough one I had to dig really deep in my bag of tricks for the answer I am pleased to announce that you are the proud owner of a1996 Yamaha YFB 250cc engine that came out of a 4 wheel off-road vehicle called a Timberwolf for more information about your question and valuable free downloads that you will need please visit the websites below. Good luck and have a nice day.
Yamaha Yfb 250fwh 1996 parts lists
Yamaha Timberwolf 2x4 Specifications Off Road com

Feb 11, 2016 | Motorcycles

1 Answer

Yamaha 650 v star tps,.. how do i find it on a 2004...then how do I test it to see if its the problem??

I would still think this is a carb issue. Most techs stink at properly rebuilding carbs because there are so many different kinds.

I however have spent 15 years honing my carb skills to perfection.

If the bike was purchased from a person at a higher altitude, main jet size might be incorrect. Or if it has modifications to the exhaust or intake - also main jet.

Contaminated or old fuel could also be a factor - have you drained the tank?

The TPS has to be set and checked with an olm meter. The TPS controls the CDI second timing curve which may have failed. I have seen this many times!

Apr 02, 2014 | 2004 Yamaha V Star Classic

1 Answer

2002 Yamaha xvs1100 won't run right after carb rebuild No power Front cylinder gets hot back cylinder stays cold.HELP

Hi, Virgil for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
star 1100 wont rev up and started poping through carb
Yamaha Star Carburator Cleaning
OEM parts for Yamaha

Aug 02, 2012 | 2002 Yamaha V Star 1100 Classic

1 Answer

1982 Yamaha Seca Turbo (XJ650LJ) Had the carbs

Mine was stored for 20 years, I ended up replacing the seat and needles, cleaning them thoroughly and when I tried starting it, nothing!! No gas was going to the carbs, it turned out to be my gas pump, it was seized by the old gas remains 'varnish' so I had to clean it numerous times, soaked it in gas cleaner (short period at a time 15 minutes or so, being a very powerful cleaner, you cannot leave it for long without causing greater problems, thus I was able to get the pump going by boosting it with my car batterie, having more cranking amps directly to the pump, the pump was able to release itself from the old crusty varnish.

Aug 29, 2011 | 1982 Yamaha XJ 650

1 Answer

Is there any usuall problem with a yamaha fzr 600? Here it is. I'm about buy a 1996 yamaha fzr600. But my friend said it's a pretty old bike and it tends to give a lot of issues. Something with the...

I agree with your friend. Most shops will not work on a bike over 10 years old. Dealers no longer have parts in inventory is one reason. The problem with the carbs is that they are CV carbs. This is a type of carb that uses an air pressure actuated slide. The throttle cable is not connected to the slide at all. If the diaphragm gets a pin hole or bad seal, the slide won't raise. Diaphragms are $160 each, if you can find them. Your best bet for parts is Babbitt's. Please rate my answer, thanks.

Aug 25, 2010 | Yamaha FZR 600 Motorcycles

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

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

1 Answer

Yamaha timberwolf 4x4 carberator issues


Firstly, if you are not a mechanical person you should never buy a vehicle that does not run.
However, here are some basic tests.
1. Connect a good battery.
2. Remove the spark plug.
3. Turn the motor using the starter motor or kick starter.
4. check for spark by inserting a new plug into the plug cap. (make sure the plug is grounded).

If the motor turns freely and there is spark, chances are good that the motor will run. This does not mean that the motor is in a good condition. Only with the motor running will you be able to know for sure.

You will now have to source a carb and fit it to the 4 wheeler.
Fitting the carb is not too difficult. Check that the intake manifold is not perished or torn, and remember to use the airfilter.

Enjoy the ride !


Mar 01, 2009 | 2003 Yamaha YZ 250

Not finding what you are looking for?
2003 Yamaha YZ 250 Logo

Related Topics:

456 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

61 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

D. E. Hev

Level 3 Expert

1132 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides