Checked my 2010 YZ450f valves today with only 47 hours

3 replies to this topic
  • Modmotoman

Posted July 28, 2012 - 03:09 PM


[color=#222222]I thought the bike seems to take a kick or two more last weekend to start when she was hot so I decided to check the valves today for the first time as I am the second owner I do not know what they were at before. I do know this is the first time they have ever been checked and there is 47 hours on the meter that is true to the bike.[/color]

[color=#222222]Intake 0.05-0.05[/color]

[color=#222222]Ex 0.09-0.12[/color]

[color=#222222]As you can see they are too tight but I am unsure if this was tight enough to affect start up?[/color]

[color=#222222]Anyhow on Hondas we tend to run them tighter then OEM specs so my question to you guy is what do you set your valves at with these 2010-2010 yz450f?[/color]

[color=#222222]Should I aim tighter then specs or right on? [/color]

[color=#222222]Also do you think these valves are walking at this low of hours? I don’t see that it ever sucked in dirt or anything by checking the intake boot.[/color]

Edited by Modmotoman, July 28, 2012 - 03:11 PM.

  • Modmotoman

Posted July 28, 2012 - 03:14 PM


dangit sorry wrong section in the forum

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  • n16ht5

Posted July 28, 2012 - 07:09 PM


Loose is better than tight. I came from hondas... you are wrong.

  • MANIAC998

Posted July 29, 2012 - 03:47 AM


Run them on the loose side. There's a spec in the manual for a reason. If you want your engine to live a long & happy life, you'll keep those valves within the specified range. And stay off of the rev-limiter! The bike will last a long time by following a few simple maintenance procedures. Check the valves, OFTEN!!! Stay off of the rev-limiter. Change the oil, OFTEN!!! And clean the air filter, OFTEN!!!

For the amount of enjoyment she provides you, can't you show her a little love? Maniac


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