Question about 2003 Yamaha YZ 250

1 Answer

Wheel lock rear wheel locked up as if transmission seised . i need advice.

Posted by on

  • 3 more comments 
  • Anonymous Dec 26, 2008

    After I wrecked the bike and bent the handle bars, the clutch doesn't seem to disengage the transmission. With the bike in first gear and the clutch pulled in it will not roll freely. With the engine running, in first gear and clutch pulled in the bike still wants to go forward. I have to use the brake to hold it back.

  • devovedder Dec 30, 2008

    can someone with no knowledge of bottom end rebuild or transmission do this or do i need a mechanic.

  • watts250whip May 17, 2009

    i have a 2008 yz250f that locked up one day and it was the crank i have a friend with a 07 did the same thing and another friend with a 06 did the same

  • Rob Selvy
    Rob Selvy May 11, 2010

    First of all I seriously doubt the transmission is seized unless you ran the bike without oil in the gearbox. I'd really appreciate it if you could give me some more feedback to the questions I asked above.
    The YZ 250 has been around since 1974 and they are a very good bike. I guess it a matter of opinion aas to weather you chose to believe they are "notorious for transmission and clutch problems" I would rank them one of the top two, they other being a Honda for reliability. I have over 30 years experience working on these bikes and tranny issues are not one of their weaknesses. As far as the clutch goes, heck we use the Yamaha clutch in Kawasaki's and other bikes because they are so durable.
    If the transmission is broken like you say, one of the wheel gears will sieze to the shaft, again thins only happens when you don't have adequate oiling. The gears rarely explode unless you downshift from 5th or 6th to first gear WOT.
    Please tell me if the bike will start or if you can kick it over at all. Pay attention when you are trying to kick it over to any particular noises. Is the shifter locked up? Meaning can you shift it up or down either way?
    I'm thinking you may have burned the rod out. This is much more likely than actually losing a transmission gear. If you did lose the rod the bike will be "locked up" like you say.
    When you lose a tranny gear it would most likely be top gear wheel on the mainshaft, if thats the case you will need special tools to split the cases and rebuild the engine.
    You can actually buy the tools from Yamaha much cheaper than paying the labor to have the engine repaired. You can contact me for free advice and all the "how to's" to rebuild the engine.
    If the connecting rod has burned out you will need a rod kit and somebody with crankshaft rebuilding experience to rebuild it. A new crankshaft will cost probably near $320.00 from the dealer. I did some checking and for the gear and the shaft in the transmission you would be spending about $75.00 for both. You will most likely need some additional parts but I can discuss that with you next time we chat.
    Best of Luck,
    Regards,
    RSelvy
    Again, just give me some more details and I'll be more than happy to assist you.


  • Rob Selvy
    Rob Selvy May 11, 2010


    1. Can you put the bike in neutral?

    2. Can you shift it at all?

    3. Did throw the chain?

    4. Has the bike been sitting for a long time?

    5. Will the motor run at all?
    If it has been sitting for a while you may just have rust in the rear brake drum causing the wheel to lock.


×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 28 Answers

Yz250 are notorius for trans and clutch problems if you can put it into nuetral your whee should move if it doesent the trans gear is busted and has the wheel locked up then you can take the transmission out and rebuild it yourself with no problems.

Posted on Dec 28, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 96 oldsmoblie cirea it will shift but not engauge and front wheels are locked in place


unlock your front brakes first. if it's front wheel drive, with locked front brakes, it would shift but wont run or you burn your transmission clutch. if it is not front wheel drive, if transmission shifts, rear wheels should turn or spin.

Mar 21, 2016 | Cars & Trucks

2 Answers

Transmission or rear end locked up


if its sat a long while with the parking brake on it could be stuck also.

Apr 26, 2015 | ATVs

1 Answer

1999 kawasaki kvf 300 rear wheels siezed


Is it the wheel bearings or is it the transmission? You will need to raise up the back of the bike to see if the wheel spins. Check the gears are in neutral. you may have to loosen the wheel aligners and push the wheel forward to remove the chain. With the chain off, if the wheel is still stuck, it could be wheel bearings, If it turns freely, I would say your transmission or primary gears have locked up.. Also, check and make sure the rear brake has released..

Jan 04, 2015 | kawasaki Motorcycles

2 Answers

Replace rear brakes


i know most vehicles use shoes for rear so we start there first
put vehicle in park to engage transmission to lock front wheels
do not apply emergency brake/ once wheel is remove use large rubber hammer and pound around outside of casing.untill it falls loose to reveal shoes and springs. sometimes residue will stick to make it loose try wd40 or something to break that residue.

Dec 16, 2013 | 2005 Lincoln Aviator

1 Answer

96 pajero auto no power front right wheel i 4wd trans fluid level ok


wd diff lock only locks the front to rear diffs not the 2 wheels on the same diff. To have both front wheels driving as you require will need limited slip diff in front or locker in front Be hard to steer in tight areas but they are available.

Apr 22, 2013 | Cars & Trucks

1 Answer

Dryer drum wont turn


Hi, If you cant turn it by hand your rear support wheels might be seised. If thats the case they will need to be replaced.

Sep 26, 2011 | Maytag Dryers

2 Answers

Craftsman mower #247.887760 rear drive. rear wheels lock-up when you try to pull mower backwards


The rear wheels are locked to the drive train. To pull or push the mower, you must pull out the release probably at the back of the mower, near the transmission.
Gary

Jul 10, 2011 | Craftsman Garden

3 Answers

Rear cluch not working


Depends on what model and components you have:

{ ...
ENGINE TORQUE DISTRIBUTION – DIRECTING THE FLOW OF POWER
In an all-wheel-drive vehicle, engine power can be directed to all four wheels. Subaru Symmetrical AWD differs slightly from model to model in how it directs power to the wheels, depending on its transmission.

MODELS WITH FIVE-SPEED MANUAL TRANSMISSION – CONTINUOUS ALL-WHEEL DRIVE: A viscous-type locking center differential and limited-slip rear differential help distribute torque – normally configured at a 50/50 split front to rear. If wheel speed differs between front and rear axles, the center and/or rear differentials lock up to help distribute power to the wheels with the most traction.

MODELS WITH FOUR-SPEED AUTOMATIC TRANSMISSIONS – ACTIVE ALL-WHEEL DRIVE: An electronically controlled variable transfer clutch and limited-slip rear differential distribute power to where traction is needed. Sensors monitor parameters such as wheel slippage, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction.

MODELS WITH FIVE-SPEED AUTOMATIC TRANSMISSION – VARIABLE TORQUE DISTRIBUTION ALL-WHEEL DRIVE: As with Active All-Wheel Drive, an electronically controlled variable transfer clutch distributes power, but through a planetary-type center differential and a viscous-type limited-slip rear differential. Torque distribution is normally configured at a performance-oriented rear-wheel-biased 45/55 split front to rear. Sensors monitor the same parameters as for Active All-Wheel Drive.

WRX STI, WITH SIX-SPEED MANUAL TRANSMISSION – DRIVER CONTROLLED CENTER DIFFERENTIAL (DCCD) ALL-WHEEL DRIVE: The STI uses an electronically managed multi-plate transfer clutch and a mechanical limited-slip differential in conjunction with a planetary-gear-type center differential to control power distribution between the front and rear wheels. Featuring manual and three automatic modes, DCCD is normally configured at a 41/59 split front to rear. Sensors monitor parameters such as wheel slippage, steering angle, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction. DCCD also features a limited-slip helical front and Torsen® rear differential. ... }

And what are the symptoms? How do you know the coupling to the rear is not working?

Jun 05, 2010 | 1995 Subaru Legacy

1 Answer

Does my truck have abs brakes? It is 4x4 1992 chevy 1500


Your truck is equipped with RWAL or rear wheel anti-lock. This just worked on the rear brakes(duh) but the speed sensor was taken from the speedometer drive at the transmission tailshaft, and would allow one rear wheel to lock as long as the speedo kept turning. Later models were improved with wheel speed sensors at each wheel.

Apr 06, 2010 | 1992 Chevrolet K1500

3 Answers

Hello, 1986 Toyota 4X4 Truck 22R carb engine manual transmission. My son was driving it and the rear wheels locked up. Driving in 2 High mode. He got the truck pulled over to the side of the road using 4X4...


I've seen a similar issue on other transmissions where the shifter slips out of the slots in the shift forks, either due to shifter bushing wear or just general wear on tte trans. It can usually be remedied at least temporarily by popping the shifter top off the trans and resetting the forks all back to nuetral and then reinserting the shifter. It gets jammed when two forks are trying to engage two different gear sets.
On one of the 4x4 sites, they tell you how to replace the shifter bushings, cheap fix if you are lucky.
Good luck.

Dec 09, 2008 | 1986 Toyota Pickup 4WD

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

Related Topics:

366 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

278 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

D. E. Hev

Level 3 Expert

1167 Answers

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

Answer questions

Manuals & User Guides

Loading...