YZ450F engine noise? Is this normal?

1 reply to this topic
  • worthyking

Posted January 11, 2013 - 04:55 AM


Hey guys, I have an 03 YZ450F that I just recently bought. After riding a couple weekends I noticed a loud engine noise. To me it sounds like valves knocking. Reading these forums I have found other threads that say it's normal for these bikes, but I just want to be sure before I do anything rash.

So...I took a video clip of the bike idling and wanted to see if you guys could take a listen and tell me if i need to worry.

Here it is:

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

Posted January 11, 2013 - 05:54 AM


Some noise is normal depending on the miles on the engine I would say yours sounds too noisy for normal. the most common easy areas to look at are cam chain tensioners and clutch basket. just having valves that are a little loose don't make a lot of noise. things like loose pistons and rod bearings also rattle but of course involve deep inspection.

Related Content


Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

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
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 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.