Question About Valves??

ok..so i've asked just around 1 billion questions on here so far..so what's one more?..ok..so i just got my first 4 stroke..an 03 yz450f..all i have owned in the past were 2 strokes..never rebuilt any..never had any problems with any of them..so i keep hearing about valves valves valves on these 4 bangers..when i bought this thing i had just begun hearing about them..i have not checked the valves on this bike..the people who owned it before me were some hippies from california..they road est. about 50 hrs of desert trails and moved to florida where it sat for 2 yrs bascially..he did start it and try a local spot and was chased off...the guy riding it was a kid with his dad..the dad said the son really wasn't ready for such a bike..and he did dump it sometimes..both radiators were torked..not leaking..but i did replace them..i mean..at $1600..i could afford some radiators..ok..so the bike started first cold kick at his house..(i felt the engine before he kicked to see if he had it running earlier..he hadn't)..and it ran like a champ..my dad test road it for me down the street and pulled a wheelie on the old chain that had about 7 inches of slop on it....so we finished the deal..so i have had noo problems with this bike..and wondered if i could get away without checking the valves..it starts soo easily..1st kick everytime!! hot or cold!..am i taking aHUGE risk by not wanting to open my engine and check valves? or is it not too risky?..and yes..i changed the plug first thing..and oil filter with gaskets..and rad fluids..and air filter..and chain..so am i ok? really?..thanx-josh

The only risk in checking your valves is that you might misposition the cam cover gasket on the way back together. Adjusting them is somewhat complicated, but not especially difficult if you pay attention to all of the details.

Being what it is, the odds are that it's a long way from needing a valve adjustment. But, without checking, you have no idea, and neither does anyone else.

ok..i'm leaning towards just leaving them alone..i mean..for me it's no REAL biggy..i know that the engine has never been apart..so it should be tight in there..and when i sell it i can say that "iv'e never had her opened"..so gray..what types of signs should i look for in pre-valve trouble?

If you see any signs, like a loss of compression when cold, it's essentially too late. Check them.

ok will do! thanx again!

Create an account or sign in to comment

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

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Similar Content

    • By High On Octane
      Got a break in the weather over the weekend, and was finally able to get out on a track for the first time since October.  I know I suck compared to a lot of guys (and kids for that matter), but I always have a blast twisting a grip and roosting some dirt!  Here's a raw uncut lap around the MX track at IMI Motorsports Complex in Dacono, CO.  Was a fun day despite some wind.  Also, there was a drift car club having a meet on the road course.  So, got to check out some drift car action while we were taking a break.
       
       
    • By PFOS58
      Lightly used Clarke Gas Tank (model #11614) for a 2010-13 YZ450F.  Includes cap.  For fuel injected YZ450F, so needs to have fuel pump transferred over.  Rest of stock tank hardware fits perfectly.  2.8 gallon capacity, so great for desert, hare scrambles, or WORCS.  Retails for $240.
      E-mail me with any questions or offers at billsworld@scinternet.net
      Buyer pays shipping from 84726.
    • By faizakhtar125
      Like this comment if you have a YZ. I want to see how many people have YZ's, especially YZ125's
    • By PFOS58
      ProMoto Billet KickIt kickstand for 2010-13 YZ450F.  Model 5006.  Used, but in good shape.  Buyer pays shipping from 84726.  Will take PayPal.
       
    • By PFOS58
      Used FMF Factory 4.1 Full Exhaust System. Includes slip-on muffler and two piece header.  Includes approved spark arrestor.  No dings or dents.  Fits YZ450F from 2010 to 2013.  You pay shipping from 84726.