First time checking valve clearance

7 replies to this topic
  • mywifefarts

Posted February 07, 2009 - 10:18 PM


Well I've got 23 hrs. on my 07 yzf450. I just finished my winter maintainance and went to check the valve clearance. This is my first four stroke and have never done this before. I did buy a good tapered feeler gauge to use. The intakes checked out. When checking the exhaust I did the outside one first and found it to be in spec but I had a hell of a tme getting the feller gauge in the middle one. At first I thought the vave was tighter than the other one until I really arced the feeler gauge as I slid it in. In that particular spot on the head, behind that valve, there seems to be a part of the casting that gets in the way and requires a sharp angle to be put on the feeler guage thus creating the illusion of more drag and friction than what's actually there.
After fighting with it for a bit, it checked out as well.

Just wondering if anyone else has had the same difficulty.

  • husqy360

Posted February 07, 2009 - 11:23 PM


i just checket my valves for the first time, couple weeks ago, and yes same problem with middle valve.

  • grayracer513

Posted February 08, 2009 - 01:23 AM


There is no middle exhaust valve. Which one are you talking about?

  • mywifefarts

Posted February 08, 2009 - 10:02 AM


There is no middle exhaust valve. Which one are you talking about?

Sorry for the poor description .The one near the timing gear end of the cam. If you're sitting on the bike facing forward it would be the left one.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • qwik12beat

Posted February 08, 2009 - 11:27 AM


Yes i know what your sayin. it can be a pain. i usaully take the feelers i need out of the feeler gauge and bend them leaving a nice curve on the end. seems to work pretty good

  • mywifefarts

Posted February 08, 2009 - 11:40 AM


It does make me feel better knowing it's not just me.

  • mywifefarts

Posted February 08, 2009 - 05:45 PM


I will never check my valves again!!! I was attempting to put my valve cover back on and now have it so wedged between th timing chain and the frame I'm sure I'll never get it back together! :lol: :)

  • mywifefarts

Posted February 08, 2009 - 09:55 PM


O.K. I over reacted, I'll check them again.

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

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 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.