cylinder head pics

10 replies to this topic
  • blazen

Posted February 05, 2006 - 08:49 PM


Hi , I have two pics. one of cylinder head and one of blue scorch mark on bearing next to crankshaft. i wanted to post them to see if cylinder needed to be honed and if the bearing is ok, but having trouble posting. How do you do it? thanks-alex

  • kizzle426

Posted February 05, 2006 - 09:05 PM


Go to and register for an account. After you do that upload the pics off your computer. Then, copy the URL or [IMG] code under the pic and paste it.

  • blazen

Posted February 06, 2006 - 05:59 AM



  • blazen

Posted February 06, 2006 - 06:16 AM



lets see if this works

  • blazen

Posted February 06, 2006 - 06:25 AM


It gives the same address for both pics. whats going on?

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

Posted February 06, 2006 - 06:29 AM


all right last try. i pasted it and then changed part of the address.

  • Butta

Posted February 06, 2006 - 06:44 AM


Your "scoring" looks more like honing marks or cross-hatching marks to me. Cylinder damage will not be circular (correct me if I'm wrong, anyone) but will be up and down the length of the cylinder.

As for the bluing on the crank, this has been talked about before and the survey says it can be normal.

  • 642MX

Posted February 06, 2006 - 10:20 AM


Thats the cross-hatches in the cylinder. An every crank on a YZF that I've seen is blue around the rod. Looks good, and it looks like you figured out photobucket aswell.

  • kizzle426

Posted February 06, 2006 - 10:36 AM


What kind of YZF is that? The top end, crank, and head all look really good to me.

  • blazen

Posted February 06, 2006 - 11:37 AM


It is a lovely 2001 yz 426. Put many hours of riding on this machine since 2001 and thought it was time for a rebuild. Valves were in spec and looks like the rebuild could of been put off too. The top inch of the cylinder is ok? It does not have the hatch marks.Thanks for the help.

  • kizzle426

Posted February 06, 2006 - 11:47 AM


Looks beautiful to me. Makes me feel better about my '02 426. It's had a lot of hours too. I checked the valves and they were still in full spec as well. I never took off the head but I'll bet my top end looks just as good. Thanks for the pics.

Related Content


The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 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.