noises in head

4 replies to this topic
  • mat

Posted September 16, 2001 - 11:50 PM


well i noticed here and there today while ridin my yz seemed to be louder in the head of the cylinder, didnt seem unusual but just like the cam chain/sprockets and valves were workin louder, i just did the valves but am going to check them again wensday, but my question is is there some kind of auto cam chain tightener on this like there were on some of the xrs or do u have to watch that as well as the valves, its a 99yz400, thanks

  • Scott_F

Posted September 17, 2001 - 04:52 AM


Did you get a manual when you bought the bike?

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

Posted September 17, 2001 - 05:40 AM


The cam chain has an automatic tensioner. If you are hearing a new noise you might want to look into replacing your cb gear key.
If you search cb gear you'll find lots of info on it.


  • eBayThumper

Posted September 17, 2001 - 03:05 PM


I hear noises wait...those are voices...


  • Boit

Posted September 17, 2001 - 08:02 PM


When you "did" the valves, did you R&R the cams during this process? From your description, it's difficult to ascertain what's going on. Be more specific and you'll get tons of help and advice.

Related Content


Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

Megabomb Fitment by 288yz450

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

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 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.