I have a 04 Yz250f and ive just put a WR250f engine in but 2 plugs on the engine that come from the stator dont match up with the 6 wire plug on the bike is there a harness that can be put in to suit or is it more a cut and shut of the wiring job.

Hi, Larry and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
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https://www.tradebit.com/filesharing.php/search/0/2002+yamaha+wr+250f
http://www.carlsalter.com/download.asp?p=1772
http://www.pdf-manual.com/vehicle/off-road-motorcycle/yamaha/manual-wr250f-2002-18159.html

U need to fix the wires to the safety switch it will not get spark until it's fixed

Hi, Aj for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. 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.
yz250f engine locking up why WR YZ 250F
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YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Hi, Gavin 03 has a better camshaft for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
difference between 01 and 03 YZ250F
YAMAHA WR 250
YAMAHA WR250F Owner Service Manual
OEM parts for Yamaha
YAMAHA WR250R Owner Manual

Hi, Bombardierxb 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 zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
what is the proper spark plug gap for 2007 yamaha yz250f
YZ250F Spark Plug Removal Replacement Applies to MOST 4 Stroke MX Bikes...
YAMAHA YZ250F LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Hi, Anonymous 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 zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
what is the proper spark plug gap for 2007 yamaha yz250f
Yamaha WR250F 2001 2002 Technical specifications
YAMAHA WR250F Owner Service Manual
OEM parts for Yamaha
YAMAHA WR250R Owner Manual

Hi, Lynnmcneely and the usual suspects are:
1. Fuel mixture too rich or enrichner left out too long.
2. Faulty spark plug.
3. Incorrect spark plug for the engine type or service.
4. Piston rings badly worn or broken.
5. Valve guides are badly worn and/or seals worn, crushed or have come off the valve guide and are pumping oil through it.
6. Spark plug cable weak or leaking check for spark jump in the dark.
7. Faulty ignition coil.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Why Does My Dirt Bike Keep Fouling Spark Plugs
YZ250F fouls plugs
YAMAHA WR250F Owner Service Manual
OEM parts for Yamaha
YAMAHA WR250R Owner Manual

Your alternator isn't putting 14 volts out to the battery. Check the stator wire on the alternator and the 3 wire plug make sure there is no gap on any of the alternator connectors and they are on VERY firm!

Hook up a multimeter inside your car and watch the battery voltage! if under 14volt you got an alternator problem!

No 3.1L but choose the one that is yours.....


2.5L Engine Firing order: 1-3-4-2 Distributor rotation: clockwise



1999-04 4.0L Engine Firing order: 1-5-3-6-2-4 Distributorless ignition system


4.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition


5.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition

www.onlinefreeebooks.net/automotive-machinery.../suzuki/

This may help.