Maintenance & Technical > KX500 Original

500 Power

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bandit88:
Think I found the issue.  Was looking at the power valves again and found that the center valve does not open flush with the top of the exhaust port, it hangs down a millimeter or two.  Any words of advise on getting it to open all the way?  Going to pull the top end tonight.

bandit88:
found that the valve guides were dropping a couple mm since the gasket is cut out for them.  Made some shims to prevent that and all seems good now.  Hoping for a test ride tomorrow.

dave916:

--- Quote from: bandit88 on May 27, 2016, 04:56:02 PM ---found that the valve guides were dropping a couple mm since the gasket is cut out for them.  Made some shims to prevent that and all seems good now.  Hoping for a test ride tomorrow.

--- End quote ---
Worn Pins on the centre valve wont help things either

Foxx4Beaver:

--- Quote from: bandit88 on May 27, 2016, 01:46:06 PM ---Think I found the issue.  Was looking at the power valves again and found that the center valve does not open flush with the top of the exhaust port, it hangs down a millimeter or two.  Any words of advise on getting it to open all the way?  Going to pull the top end tonight.


--- End quote ---

here's a good thread on KIPS tuning and the center valve...thanks to KXcam22 and Doordie...

http://www.kxriders.com/forums/index.php/topic,1367.0.html

bandit88:

--- Quote from: Motorrad on May 28, 2016, 05:07:55 AM ---Got to shim em...   and don't run the base gasket with the big holes

--- End quote ---

What gasket do you run? 86-88 or some custom cometic one?

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