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Valve Adjustment Video and Write Up Grizzly 450

Discussion in 'Technical Articles' started by Butch450, May 17, 2012.

  1. Butch450

    Butch450 Administrator
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    Thought I should throw this up on here. I originally did this for GR so in the video I mention it :p


    The video shows all the work but doesn't mention specs so I listed all of them in this post below the video.









    To begin checking/adjusting your valves, you should have a service manual on hand and the engine should be cool. Here is a list of the parts I needed to remove on the 450 to access the intake valve tappet cover.


    Seat
    Side Plastic Panels
    Tank Cover Plastic
    Fuel Pet Cock Knob
    Fuel line (from Carb)
    Fuel Tank
    Rubber Mat (under fuel tank)


    The service manual states you need to remove the front rack, hood and fender to gain access to the exhaust valve tappet cover, but I was able to work easily on it by simply removing my hood, taking out the 3 bolts that secure the front plastics to the frame and then removing the 3 bolts that secure the front right side of the fender to the right floorboard. Once this was done the fender was loose enough to move up out of the way giving plenty of room to work on the exhaust valve.


    To check Valve Clearance, remove


    Spark Plug
    Recoil Starter
    Timing Plug
    Tappet Cover (Intake Valve)
    Tappet Cover (Exhaust Valve)


    The grizzly 450 has 1 Intake Valve and 1 Exhaust Valve


    First thing you need to do is set your crankshaft to TDC (Top Dead Center) on the Compression Stroke. This is done by turning your crankshaft counter clockwise until you have lined up your T mark on your rotor with the stationary pointer on your crankcase cover (See Video) you should also have clearance between the valve stem and rocker arm when you are at TDC.


    Once at TDC you measure and adjust your valve clearance as per your service manual. On the 450 the valve clearance is...


    Intake = 0.06mm ~ 0.10mm
    Exhaust = 0.16mm ~ 0.20mm


    Once you have your valves adjusted, check all the parts you removed to be sure the seals and O rings are good, bolt everything back on using the following torque specs. Be sure the ridge on the tappet covers are facing up.


    Adjuster Locknut = 20 Nm (2.0 m kg, 14 ft lb)
    Tappet Covers = 10 Nm (1.0 m kg, 7.2 ft lb)
    Spark Plug = 18 Nm (1.8 m kg, 13 ft lb)
    Recoil Starter = 10 Nm (1.0 M kg, 7.2 ft lb)


    Start engine to ensure it is running properly and that their are no leaks and then put all your plastics back on and head out and ride!
     
    #1
    Last edited by a moderator: Feb 13, 2015
  2. Jfer

    Jfer Site Supporter

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    Great Video, Thanks for putting it together.
     
    #2
  3. Rage Customs

    Rage Customs Preferred Vendor

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    nice video bud! great job!
     
    #3
  4. RTxmr800

    RTxmr800 Member

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    Awesome vid as always butch!


    I have a couple of non rlated questions tho lol

    1. Where did you get the board in the back ground to hang tools and such on?
    2. Also what rear box is that and do you like it ?
     
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  5. Butch450

    Butch450 Administrator
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    The peg board was already there when I bought the house but, I believe home depot has it. The rear box is a Tamarack classic low profile front storage box. It is decent for the size, but I like my Kolpin rear trail box more. Tamarack was sold a few years back and the new owner really let the company go to shit lol. The original owner has taken over the reigns there again and is trying to restore the company and it's name back to their former glory. I guess time will tell if he is able to achieve this since the last owner really ruined the name.
     
    #5
  6. RTxmr800

    RTxmr800 Member

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    Thanks Butch ! Sorry for the thread jack lol
     
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  7. Butch450

    Butch450 Administrator
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    Like a little off course banter ever bothered me lol.
     
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  8. El Dee

    El Dee Member

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    The evel one

    Great video Butcher..Do you always listen too Pantera when you run your valves???
     
    #8
  9. Butch450

    Butch450 Administrator
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    Seems like when I am working out in the Garage it's usually a heavy dose of Pantera, Slayer and Fear Factory playing in the background. Not sure why but Pantera seems to fit with wrenching stuff!
     
    #9
  10. Grizzly77

    Grizzly77 Site Supporter

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    It looks like 450 and 660 are similar. What about 700, does anybody has a walk thru? :confused:
     
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  11. cubbee

    cubbee Site Supporter

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    Thanks for the video Butch! Probably am going to be checking the Kodiak's valves in the not too distant future.
     
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