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valve and cam chain check. TTR250

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  • valve and cam chain check. TTR250

    I'd like to check the valve clearance and available cam chain slack since i'll have to do it sooner or later whether its on this bike or not so I suppose I should do it now. Can someone give me a step by step with the required tools. I'm guess just a socket wrench and feeler guages? in order to check the cam chain's available slack do I have to remove the head and thus be in a dust free environment?
    I have the online manual but as with everything else it leaves out some necessary information

  • #2
    easy peasy take off the tank then the cover. it's all logical
    WR450 03
    TTR250
    CRF250x
    all the way with the DSMRA
    Fossil

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    • #3
      One of the easiest bikes to do the TTR250
      Take tank off, wash under frame/wiring real good , undo 3 5mm allen keys on rocker cover. Take it off, rotate engine with kickstarter until intake (or ex) cam has lobes facing oposite to bucket. Check clearence with feeler gauges (think they are .004" and 009"??, around that will do as long as they have clearence)
      Rotate engine till other cam has lobes oposite buckets, check that.
      Cam chain should be taught between cam sprockets and not pull off the sprockets (like how you check for chain and sprocket wear)
      Cheers

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      • #4
        are there markings to check out how much travel the tensioner has left? and lets just assume the chain is buggered is it easy to replace? something like remove tensioner, pull chain off, put new chain on. Or does it require further disassembly

        I'm guessing these 2 and the rings are about the only things that need checking on a TTR and the very probable next bike an XR650

        oh and is it fine to check the valves/chain in the open? or at least in a ventilated but covered area. Workshop is full of crap atm

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        • #5
          Just got round to taking the cover off, checked the cam chain its very tight no problems there but don't have feeler guages will get some tomorrow. Is there a specific set I have to get for checking valve clearance? or just grab any and it'll do?
          and how much can I expect to pay for a decent set?

          Thanks

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          • #6
            Bump......just got a cheap old (TTR) one and what comes up DBW!!! YAY
            Ultimate power breeds ultimate corruption ^roost

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            • #7
              quote=Max at the Flat. "just got a cheap old (TTR) one and what comes up DBW!!! YAY
              Congrats: The TTR is a versatile & reliable bike: It'll do everything you force-it-to... It'll enable you.

              In reply to querty1234 from-being some 13 years ago: A set of Feeler-Gauges are useful & cheap.
              Leave the Tensioner until you hear slapping-noises. Tappets aren't hard; yet they-take some nous.
              The More I Learn... The Less I Know.
              That Which Doesn't Change... Stays The Same.
              Those That Don't Fall... Just Aren't Trying Hard Enough.
              Genius or Idiot... Sadly it's Defined by the Mediocre Masses... With their Hindsight.
              Dicklaimer... The Text above is to be Evaluated by a Responsible Person... Prior to Any Action Being Taken.

              *George Carlin*What We Do*No Bravery*Tell the Truth*911*Genetic Armageddon*Carbon Tax*Interplanetary Climate Change*Fracking*Shock Doctrine*Extinction Protocol*

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              • #8
                As an aside on this is there anywhere I can get a rebuild kit on one of these? Not that I think it needs it but I would like to pull it down and check the piston/head/cam chain and would like to have all parts on hand just in case as I would think it would be an expensive exercise if I was to go through Yamaha. I see Ballards has some stuff but not all that I am after.
                Ultimate power breeds ultimate corruption ^roost

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                • #9
                  Originally posted by Max at the Flat View Post
                  As an aside on this is there anywhere I can get a rebuild kit on one of these? Not that I think it needs it but I would like to pull it down and check the piston/head/cam chain and would like to have all parts on hand just in case as I would think it would be an expensive exercise if I was to go through Yamaha. I see Ballards has some stuff but not all that I am after.
                  Try your local Yamaha dealer....


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