Motor locked up

12 replies to this topic
  • MX2Havasu

Posted November 07, 2004 - 05:22 PM


So i guess the best place for the motor to lock up was in the air. I ended up go over the bars and at the hospital. But more importantly, my 01' YZ426 wont kick over. The kick starter is stuck about half way down. I haven't tried any troubleshooting yet. Just wanted to see if anyone else out there had this problem.

  • sirthumpalot

Posted November 08, 2004 - 04:54 AM


Without more information... determine if it's locked in the tranny or in the motor. If you put it in neutral or pull the clutch will the rear wheel spin? If not then it's likely in the tranny, starting disassembling. If so, then it's likely in the motor. First check the valve timing, and look closely at the cams not just the timing marks. You're looking to see if either the timing chain slipped or a cam sprocket spun on the cam. If the timing is out then most likely the piston hit a valve (or two or three) so save your allowance and start taking it apart. If the timing is OK then take the right side cover off and see if anything got jammed in between the clutch gear and the main gear on the crank shaft. If nothing is there then I would say start disassembling the top end and see what you can find. Maybe someone else has better advice but I hope this helps, let us know what you find!

  • Fyrnsmk

Posted November 08, 2004 - 09:14 AM


Were you doing any acrobatic tricks when this happened?? Might be the hen-way. :cry:

  • jespertheil

Posted November 08, 2004 - 11:40 AM


My friend had the same problem. He lost 3 valves and they f***ed everything up in the top.. Cylinder, valves and seat, lots of holes in the piston, nothing there to save.. I bought it from him to have some parts for my own..

But as said, take it step by step and find the problem.
I hope it´s not so bad with yours. Good luck my friend. :cry:

  • TimFurryBalls

Posted November 08, 2004 - 01:24 PM


Hey Fyrnsmk, what's the chances of us getting a peek of your full-sized avatar? :cry:

  • yzf450jack

Posted November 08, 2004 - 08:14 PM


I wanna see too :cry: :cry: :cry: :cry:

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Butta

Posted November 09, 2004 - 12:24 AM



Try that

  • TimFurryBalls

Posted November 09, 2004 - 12:50 AM


Oh my god! I have never SO wanted to be a motocross seat in my life. . . :cry:

  • SureBlue

Posted November 09, 2004 - 12:58 AM


:cry: Nice cheeks! :cry:

  • Fyrnsmk

Posted November 09, 2004 - 10:35 AM


Yes it is a rough life i live! ha ha :cry: more importantly, mx have you tried tearing into the motor yet?

  • TimFurryBalls

Posted November 09, 2004 - 04:08 PM


Yes it is a rough life i live! ha ha

Don't even tell me that's your girlfriend. . . :cry:

  • MX2Havasu

Posted November 09, 2004 - 09:26 PM


Actually it's his little sister. :cry:


Posted November 10, 2004 - 06:42 PM


:cry: :cry: :jawdrop:WOW

Related Content


Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.