How Important is Valve Adjustment? - Kawasaki ATV Forum
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post #1 of 22 Old 01-24-2011, 08:12 AM Thread Starter
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How Important is Valve Adjustment?

I have an 08 Brute 750 with about 1500 miles. Runs great. How do I know if I need the valves adjusted? They have never been done and I'll have to take it in which will likely cost a lot of money. Hate to spend the money only to find out they were fine.
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post #2 of 22 Old 01-24-2011, 08:19 AM
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Its free if you learn to do it yourself. Its a bit of a pain to get to the valves, but its very doable by the average do-it-yourselfer/shade-tree mechanic. All you really need is some feeler gauges (bent at 45 degree angle works best) and a few basic tools. It would be a good idea to buy a Service Manual for your quad before attempting to do this.

As far as symptoms, the motor usually gets hard to start when the valves are out of spec. I usually adjust my valves about once a year (if I ride regularly).

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post #3 of 22 Old 01-24-2011, 09:28 AM
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Another symptom is a ting-ing sound coming from your top end

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post #4 of 22 Old 01-24-2011, 09:28 AM
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Quote:
Originally Posted by Mikeyboy_esq View Post
Its free if you learn to do it yourself. Its a bit of a pain to get to the valves, but its very doable by the average do-it-yourselfer/shade-tree mechanic. All you really need is some feeler gauges (bent at 45 degree angle works best) and a few basic tools. It would be a good idea to buy a Service Manual for your quad before attempting to do this.

As far as symptoms, the motor usually gets hard to start when the valves are out of spec. I usually adjust my valves about once a year (if I ride regularly).

Happy trails...
+1. To add to those comments, valves get tight over time.....as the old saying goes....."slappy valves are happy valves". Don't neglect them!!

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post #5 of 22 Old 01-24-2011, 10:33 AM
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I have 5000km on my prairie 700 and have never done a valve job, starts right up and i hear no ticking. Once a year for a valve job seems excessive to other poster?
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post #6 of 22 Old 01-24-2011, 10:34 AM
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When u do the valves were do u put the feeler guage and r the valve relaxed and should there be slack in the rocker arms i guess u call them
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post #7 of 22 Old 01-24-2011, 11:50 AM
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I could be wrong, but I thought the owner's manual recommends valve jobs about once every 100 hours or once per year, something like that. To be safe, I usually do it once a year (if I ride often). Its really not hard to do and is not a big deal at all after you've done it once.

As far as how to do the valve adjustment, I loosen the locking nut on the rocker arm and loosen the set screw. Then I slide the appropriate size feeler gauge between the rocker arm and the top of the valve. Then I tighten down on the set-screw until I feel some resistance while sliding the feeler gauge back and forth. Once its at the correct setting, I tighten the lock nut. Repeat for the other 3 valves...then double check all 4 again.

The KEY to remember is the cylinder that you are adjusting must be positioned at TDC. So you will need to remove the cover over the flywheel to find the TDC marks for the front and rear cylinders and make sure you turn the crank over to the correct TDC mark before you do any vavle adjustments....then turn the crank over again to do the valve adjustments for the other cylinder.

Good luck and happy trails...

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post #8 of 22 Old 01-24-2011, 12:34 PM
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Some good pics
How to: Adjust Valves

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post #9 of 22 Old 01-24-2011, 01:39 PM
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Quote:
Originally Posted by ForceTA308 View Post
Another symptom is a ting-ing sound coming from your top end
Not really.
The valves tend to get tighter on these engines,making them harder to start,even harder when warmed up.

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post #10 of 22 Old 01-24-2011, 01:40 PM
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A valve job and valves adjustment are 2 different things....at least in my book.


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