Maintenance & Technical > KX250 / KX125

KIPS subvalves are out by 1 tooth?

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needsatopend:
'01 kx250

When the short tooth on both subvalves are lined up with the mark on the main rod, my subvalves won't fully open

Here in the correct timing, the short tooth is aligned with the line on the rod mark



And when I look down the exhaust, with KIPS at fully open position, the valves are barely half way open





Now if I rotate both subalves out by one notch, it seems like it would be the correct way they should go..

Here short tooth is to the left of the rod mark on one side. Same done to the other



And the valve is more fully open. flat surface of the flash i flush and makes a fully open port

DoldGuy:
Check the timing on your Main / Center valve, if it is not timed correctly it will prevent the Side / Barrel valves to not fully open. Hope this helps.

DoldGuy

needsatopend:
The center flapper valve is completely closed when aligning the 2 side valves and idle gear

It works perfectly, just the two side valves needed to be rotated by one tooth to line up

DoldGuy:

--- Quote from: needsatopend on August 14, 2015, 04:27:10 PM ---The center flapper valve is completely closed when aligning the 2 side valves and idle gear

It works perfectly, just the two side valves needed to be rotated by one tooth to line up

--- End quote ---

I understand it is fully closed, but, it also needs to be correctly timed, otherwise, it will prevent the side valves from fully opening.

needsatopend:
Nope I'm confident I have the main valve lined up; at the upper side cover, the dot on the gear tooth lines with the mark on the smaller rod that runs off one of the side valves...I did that first

From the manual(after doing center valve installation):

-Turn cylinder upside down
-Push main valve rod as far as it will go
-Insert the exhaust valves in the cylinder. The right exhaust valve [A] is smaller, etc tec

-The punch marks on the valve pinions should align with the grooves [C] on the rod

.......

Well in that "correct" orientation, the side valves are not fully open. Unless I shift them one notch...one goes clockwise and the other counter-clockwise

Try these videos:

This is the "correct" assembly with the marks aligned----> http://gfycat.com/LegalDesertedClumber notice the side valves don't fully open

And when I shift them one tooth out from the alignment mark-----> http://gfycat.com/DearWellmadeAmericancrocodile

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