Maintenance & Technical > KX500 Original

how to i check the power valves

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alexander-vmann:
i noticed a exhaust leak in the fron, oil was spitting on to the pipe so i took of the pipe to re install it with some high temp silicone, i used a flashligth to look at the piston and exhaust valves, one valve was sorta pointing towords the piston a bit more then the other so i pushed them with my finger and one sprung back nicely and one not so nice THE QUESTION is how do i check if they opperate proberly without takeing the entire thing apart?

sandblaster:
Sorry buddy, if one isn't springing back correctly then they are not working right.
It sounds like you need to disassemble the cylinder, remove the valves and clean them and the cylinder, then reassemble.
While you have the top off check it good...

alexander-vmann:

--- Quote from: sandblaster on August 31, 2015, 01:36:56 PM ---Sorry buddy, if one isn't springing back correctly then they are not working right.
It sounds like you need to disassemble the cylinder, remove the valves and clean them and the cylinder, then reassemble.
While you have the top off check it good...

--- End quote ---

yeah that is what i thought, but  how are the power valves supposed to function? i pushed them inwards towards the piston, i only hope that is the way they go since they would not go the other way :-P and is it safe to pull the pin that connects to the govenor arm to see if they both open?

sandblaster:
One way that you get the partial story is to pull the right plastic linkage cover off.
Start the bike.
As you rev it up the linkage should smoothly and quickly actuate.
If it hangs anywhere then there is a issue with sticky valves (Which you know you have) Or a problem with your governor, or both.
If you remove the linkage and then actuate by hand it should work very easily.

alexander-vmann:

--- Quote from: sandblaster on August 31, 2015, 02:05:34 PM ---One way that you get the partial story is to pull the right plastic linkage cover off.
Start the bike.
As you rev it up the linkage should smoothly and quickly actuate.
If it hangs anywhere then there is a issue with sticky valves (Which you know you have) Or a problem with your governor, or both.
If you remove the linkage and then actuate by hand it should work very easily.

--- End quote ---

and if exhaust is comming from the linkage?

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