I was wondering if there is any special tools needed to adjust the valves on an 04 Grizzly ?? I am thinking about buying a manual and doing it myself instead of giving the dealer $150.00. What do you guys think ?? I do all my own automotive work, About the only thing I haven't done to a truck is rebuild a tranny or transfercase so I am pretty mechanically inclined.

 

I'm just guessing here, but since the Griz and Raptor have very similar heads it should be pretty close. The only "special" tools you need will be a feeler gauge. Call your dealer and get the valve specs, roll it to TDC after the intake stroke, and adjust away. Its a pretty simple job, but can be time consuming having to remove all the plastic and such.

 

Feeler gauges and a tappit adjusting tool, service cd is a nice tool to have as well.

 

I don't have the tappet adjuster. I have a square drive wood screw stuck in a piece of dowel rod. Works fine, costs nothing. The adjuster has a square head, and the square drive screw fits it perfect.

Go on highlifter's forum and do a search under the yamaha forum on valve adjustment. You will find enough there. if not, try www.ansley.net This is texmudders site, and he has the screen shot from the yamaha manual with the valve specs and everything. Thats all I used. Remember to make sure the piston is at top dead center on the compression stroke. Line up the rotor with the correct mark (don't remember it, thats why I said check HL forum), and you can figure out the stroke by pulling out the spark plug and when you crank the piston and feel air rush out, you will know the piston is compressing.

 

Great tip on the square drive wood screw Andy! I'm coming up on my first valve adjustment on my Wolvey and will try it out. Thanks!

 

Thanks for the help. I am going to check into and try doing it myself. The more I can keep other people from working on my stuff the better. I have never had to good a luck getting quality service on anything. There is always something loose, not put back or oil dripping because they didn't clean up when changing oil.

 

For my first valve adjustment, I too, used the trusty bent over wood trim screw. I then happened to see a nice tappit adjusting tool kit at the dealer for $55 and it is a great help on the exhaust tappits. The set has 5 pieces and there is a wrench with the 3mm square driver built in. Lot of money for such a small tool set but it makes my life easier and I wrote the expense off as a business tool as the atv is an expense.

NOTE:

The valve clearance must be adjusted when
the engine is cool to the touch.

Adjust the valve clearance when the piston is
at the Top Dead Center (T.D.C.) on the compression
stroke.


Valve clearance (cold):
Intake:
0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)

Exhaust:
0.15 ~ 0.20 mm
(0.0059 ~ 0.0079 in)