Jump to content
Sign in to follow this  

my valves go outa wak

Recommended Posts

can anyone explain whyyyyy the valves go out of wake in the first place?? everyoneeeeee talks about valves getting out of line but how and y? isnt it physics? lobe opens springs close dont worry i know how an engine works trust me

Share this post


Link to post
Share on other sites

what ive been told is the valve wears into the seat and closes the gap between the opening mechanism (whatever type is used) eventually it wont close fully and the compression will drop

Share this post


Link to post
Share on other sites
what ive been told is the valve wears into the seat and closes the gap between the opening mechanism (whatever type is used) eventually it wont close fully and the compression will drop

Pretty much, the face of the valve wears against the seat (and the face of the seat wears with it) from opening and closing against each other so many times. If dirt gets past the air filter then this acts like sand paper between the valve and seat and wears the valve much faster, causing the valve to go out of adjustment very quickly. This is why it is important to perform proper air filter maintenance.

Share this post


Link to post
Share on other sites
Metal on metal, at some point something is going to wear down.

lubrication??

Share this post


Link to post
Share on other sites
2_3-2_7MVS2.gif?????????????????????????????????????????????????????????????????

Share this post


Link to post
Share on other sites
lubrication??

Yeah, because oil stops all wear from ever happening and everything always stays in spec for it's entire life.

BTW, the stems will also stretch a bit. Remember, you're dealing with measurements in the thousandths of an inch, doesn't take much wear for issues to pop up.

Share this post


Link to post
Share on other sites
Yeah, because oil stops all wear from ever happening and everything always stays in spec for it's entire life.

BTW, the stems will also stretch a bit. Remember, you're dealing with measurements in the thousandths of an inch, doesn't take much wear for issues to pop up.

fair enough i think we also have to remember how many times a second these things open and close lol

Share this post


Link to post
Share on other sites

As stated earlier, the valves wear down and become thinner. As they get thinner, the gap at the other end gets smaller. If allowed to get too thin, they will eventually pull through the hole (not good).

Share this post


Link to post
Share on other sites
lubrication??

There is no lubrication between the valve face and the seat other than the little bit of fuel that may drop out of the incoming air/fuel mixture, and gasoline is not a very good lubricant. Beyond that, no lubricant will prevent wear like that from happening indefinitely.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

  • Similar Content

    • By Big64N
      Good condition with a long list of high end upgrade parts.
      Rekluse EXP 3.0 with cover and slave
      EVO- Ellensburg suspension tuning for 6' 200# expert rider
      Fork bleeders
      Trail-tech map switch
      Moose 1-1/8 flex bar
      CYCRA probend bar guards
      SXS skid plate with linkage plate
      Clutch and water pump guards
      Frame guards
      Fastway Evolution III pegs
      SRT Pro Armor radiator and rear rotor guards
      Acerbic Front rotor guard
      TM designs chain guides
      DID race chain
      Renthal sprockets
      Gripper seat
      FMF F-bomb header
      Dirt Tricks timing chain tensioner
      Pro Wheel, wheels
      Tubliss front and rear
      New top end and valve adjustment 60 hours old
      Many more aftermarket parts as well as spare parts and service manuals included in the sale.  Willing to include 4 sets of tires with 80% tread left for full price.
      Great bike with plenty of life left and set up for anything from single track woods to wide open dessert.
      Can hang with any of the 450's but is much easier to handle in the tight woods.
      Priced to sell at $6000.00 
      Willing to consider reasonable offers but no trades or carry.
    • By filterx
      34 Days and what ever in Beautiful Chile
      http://www.fim-isde.com/home/
    • By Project57
      So if I can’t buy a used bike from out state looking for anyone that has or knows of a low mileage California 2017 / 2018 Beta 500 RRS?
      Thanks in advance!
    • By Project57
      Looking to buy a used Beta 2017 500 RRS from outside California.  Can I plate (Register with CA DMV) the bike in CA?  If so what is the best way?  Don't have the money to put down for a new bike from a Dealer in CA.  Any help or sugguestions would be appreciated.  Thanks in advance.
    • By MANIAC998
      This continues to be my favorite trail/race weapon!! In our Eastern tight woods, power is not King, handling is. And this thing outhandles them all!!!!
×