Question about 2003 Yamaha YZ 250

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Yamaha timberwolf 4x4 carberator issues

I was recently offered a deal on a yamaha 4-wheeler that doesn't run. The carberator is not attached at all, so I can't hear it run or nothing. I would realy like to own the 4-wheeler, is rebuilding a carb. a hard task? Is there anything that I need to replace or check for wear that will help with this task? The wheeler is a 1990 yamaha timberwolf 4x4 350

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    How to remove cables off carb 400 grizzly 4 wheeler yamaha


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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 !


Posted on Mar 01, 2009

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1995 Timberwolf. When I try to start it, all I get is a click and it will not go into gear. What's wrong?

Hi, Brooke it should be noted that in order to "PROPERLY" diagnosis any electric starter issue it is "IMPERATIVE" that you begin with a fully charged battery 12.5 volts or better and be able to pass a proper load test, and the usual suspects are:
1. Battery terminals have loose or corroded connections.
2. Battery cables faulty due corroded or broken internal wiring at the cable connector especially the "NEGATIVE" cable which needs to be checked at "BOTH" ends.
3. Battery voltage, 12.5 volts or better,to the main circuit breaker to the ignition switch to the security/ignition fuse to the TSM/TSSM module to the engine stop/run switch to the starter button to the starter relay to the green wire that connects to the starter solenoid has dropped more than 1/2 volt.
4. With a voltmeter connected to the battery, the ignition switch in the on position, the kill switch in the run position, the starter button depressed, starter engagement should not bring voltage below 8-9 volts.
If a lower voltage is produced a proper battery load test should be performed with a load tester to validate battery integrity or battery replacement.
5. Faulty starter relay, check continuity.
6. Faulty starter solenoid, check contact plate and shoes for excessive electrical erosion/etching, refurbish as necessary or invert contact plate and use the virgin backside. Check contact shoes for being loose. Replace solenoid if the negative function is still a final outcome.
7. Faulty starter, bench test starter with a 12-volt battery if negative function check, decontaminate and undercut armature commutator segments as necessary, check segments with an ohm-meter probe each one and the segment next to it for shorts. Have the armature tested with a growler and field coils, and brush plate with an ohm-meter for opens, shorts or grounds. Replace brushes if less than .438" It is generally cheaper to overhaul/refurbish a starter motor than buy a new one.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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The frame number (VIN #) is what will tell you the information needed. Call a dealer with the VIN number ant they can tell you exactly what you have got. Chances are the dealer can tell you. The Timberwolf came in 2x4 and 4x4 models. You can look up the part numbers for both and see if the casings have the same part numbers. If so, you should be able to do a swap out. Check out the part numbers on the frames.

Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.

Please top rate this answer. Thanks!

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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.

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what an *******. If I had a manual or my library had one I wouldnt be asking the question. If I need help fixing something dont tell me to go jump in a lake just dont answer

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