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    valve clearance

    hey all

    i have just done alot of work on my bike and want to do the clearance but when i went toadjust the valve i noticed i could lift the rocker arm up off the valve is this normal?

    i have set the valves to the specs, just not sure it the rocker arm should have lifted that much.

    and yes i done the compression stroke and tdc just too cross that out

    any help would be great

    thanks in advance

    luke (cracker)

    #2
    i have set the valves to the specs, just not sure it the rocker arm should have lifted that much.
    If ... You were set at FT ( timing mark) on the front cylinders valves and RT to adjust the rear valves ...
    and if the lift or clearance exceeds the specs then you've got some loose valves that need to be adjusted... Needless to say if the min spec clearance won't fit you've got some tight valves that need adjusting

    Note: you have to be on the compression stroke...( first on the front cylinder then the rear )

    I pull one spark plug from the front and rear and then place a finger over the spark plug hole as you rotate the motor ( proper direction ) so you can feel the air escaping and then set the crank to FT for the front cylinder

    repeat this procedure for the rear RT timing mark

    Valve clearance ( for NT650 )

    IN 0.15 0.02 mm (0.006 0.0008 in)
    (COLD)

    EX 0.20 0.02 mm (0.008 0.0008 in)

    Here's your chapter...

    But ... you'd better CHECK the NT400 valve specs as I do not know if they are the same as the NT650

    Then...Just double check your work


    http://hawkworks.net/manual/3.html#3-7-valve-clearance

    Aloha Spa
    Last edited by SPA; 02-28-2013, 09:03 AM.
    "Hawk Porn" http://picasaweb.google.com/11124379...eat=directlink 1990 NT650-Penske 8981, Race-tech Springs & Gold Valves, Steve Lenac six-piston caliper & EBC rotor,SS Brake lines Ft / Rear lines through SSA ,VFR brake lever, F2 front wheel, F-120/70 R-160/60 Dunlop Roadsmart, Full-Supertrapp Exhaust, Stage 1 Jet kit, K&N Filter, Corbin Seat, Pro-Tec Clip-On's/ Past Rides...1986 VFR700F2 Interceptor / 1979 Yamaha Rd400 Daytona Special

    Comment


      #3
      i glanced over this before doing mine, its a good write up:

      http://www.elsham.pwp.blueyonder.co....ets/index.html

      Comment


        #4
        Yeah has some good tips...

        But the NT timing marks FT & RT are on the flywheel not the cam gear...
        "Hawk Porn" http://picasaweb.google.com/11124379...eat=directlink 1990 NT650-Penske 8981, Race-tech Springs & Gold Valves, Steve Lenac six-piston caliper & EBC rotor,SS Brake lines Ft / Rear lines through SSA ,VFR brake lever, F2 front wheel, F-120/70 R-160/60 Dunlop Roadsmart, Full-Supertrapp Exhaust, Stage 1 Jet kit, K&N Filter, Corbin Seat, Pro-Tec Clip-On's/ Past Rides...1986 VFR700F2 Interceptor / 1979 Yamaha Rd400 Daytona Special

        Comment


          #5
          Originally Posted by SPA View Post
          Yeah has some good tips...

          But the NT timing marks FT & RT are on the flywheel not the cam gear...
          yea good point, meant more for the 'clack test' description

          Comment


            #6
            while doing the valve check one real PITA is having to deal with front valve cover and coolant lines, glad I did : intakes were set at 0 (my smallest gauge didn't fit) and exhaust was .25mm, rear head was dead on spec.

            here's what I use, not so critical on the Hawk but makes my life much easier when I do KTM valves



            best way to do all those old bikes with crew cap access



            but if anyone wants to complain try checking 16 clearances on a desmo motor...


            http://www.facebook.com/VaporBlast

            Comment


              #7
              Motion Pro sells a Tappet Tool Kit, Part No. 08-0073, around $40 retail.

              Not nessary but it does make the job easier

              JD at www.hordpower.com or your local parts guy can order it for you.

              Here: http://www.motionpro.com/motorcycle/partno/08-0073/
              "Hawk Porn" http://picasaweb.google.com/11124379...eat=directlink 1990 NT650-Penske 8981, Race-tech Springs & Gold Valves, Steve Lenac six-piston caliper & EBC rotor,SS Brake lines Ft / Rear lines through SSA ,VFR brake lever, F2 front wheel, F-120/70 R-160/60 Dunlop Roadsmart, Full-Supertrapp Exhaust, Stage 1 Jet kit, K&N Filter, Corbin Seat, Pro-Tec Clip-On's/ Past Rides...1986 VFR700F2 Interceptor / 1979 Yamaha Rd400 Daytona Special

              Comment


                #8
                thanks a million got it sorted i hope

                Comment


                  #9
                  Originally Posted by Dmitry View Post
                  while doing the valve check one real PITA is having to deal with front valve cover and coolant lines, glad I did : intakes were set at 0 (my smallest gauge didn't fit) and exhaust was .25mm, rear head was dead on spec.

                  here's what I use, not so critical on the Hawk but makes my life much easier when I do KTM valves



                  best way to do all those old bikes with crew cap access



                  but if anyone wants to complain try checking 16 clearances on a desmo motor...

                  Dmitry..does that tool have a 10mm wrench for the locknut?..If so, I have a good one from my days of working on AutoCraft VW engines.
                  If mice were men and men were mice, once upon a time, Men were mice and mice were men, twice upon a time.

                  Comment


                    #10
                    Want to do valve clearances. Forgot what a pain the front cylinder is. Oh well....
                    90 Bros 650... Under Construction

                    Comment


                      #11
                      I see those AutoCraft motors are still winning indoor midget races.

                      Comment


                        #12
                        Originally Posted by old and in the way View Post
                        I see those AutoCraft motors are still winning indoor midget races.
                        Not sure how we got here from valve adjustments, but I'm always up for a good thread Jacking
                         
                        "Hawk Porn" http://picasaweb.google.com/11124379...eat=directlink 1990 NT650-Penske 8981, Race-tech Springs & Gold Valves, Steve Lenac six-piston caliper & EBC rotor,SS Brake lines Ft / Rear lines through SSA ,VFR brake lever, F2 front wheel, F-120/70 R-160/60 Dunlop Roadsmart, Full-Supertrapp Exhaust, Stage 1 Jet kit, K&N Filter, Corbin Seat, Pro-Tec Clip-On's/ Past Rides...1986 VFR700F2 Interceptor / 1979 Yamaha Rd400 Daytona Special

                        Comment


                          #13
                          Originally Posted by SPA View Post

                          Not sure how we got here from valve adjustments, but I'm always up for a good thread Jacking
                          It's all about timing. Like resurrecting a thread after almost FIVE years.


                          If you were looking for a support group you're barking up the wrong tree. This place is fulla enablers dude. - Shooter77us

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                            #14
                            Drop the radiator.

                            Comment


                              #15
                              Originally Posted by SPA View Post

                              Not sure how we got here from valve adjustments, but I'm always up for a good thread Jacking
                              I used to build those AutoCraft sprint engines in a shop in Loveland, Co.. We built them in a clean room..had a million dollars worth of pretty intense mechanical aids and a big $$$$$ to buy components that worked in those engines..up to 2800cc..and 350 HP back in the day..circa mid-late 1970's, early 1980's..Even with good builds, they were hard to keep the pistons where they belonged.
                              If mice were men and men were mice, once upon a time, Men were mice and mice were men, twice upon a time.

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