CAD drawing of the 87-88 KX500 power valve

[queen of spodes]

This may be a great way to get a handle on reproducing power valves for an old KX:
http://grabcad.com/library/1987-1988-kx500-power-valve-1

[Goat]

Which valve is that right or left? Did you make that file?

I'm hoping within a year or less we will have our shop built and have all the tools to make some parts for these old bikes. Power valves are on top of the list.

[motopunk]

Which valve is that right or left? Did you make that file?

I'm hoping within a year or less we will have our shop built and have all the tools to make some parts for these old bikes. Power valves are on top of the list.

left and right valve of the 86-88 kx500 cylinders is the same. same partsnumber for both... 

[Goat]

For some reason I was thinking the gear was smaller diameter on one of them. Maybe that was my 87 250??

[bens87braap]

the 87 250 has two different valves one is like a mirror image of the other so its backwards and the gear is larger too.

[pippin07]

be good to her how the reproduction of these go s ll thats available now are secod hnd items if you can find them, i for one wouldbe intersted as i have an 87 and it took a long searh to find a set of power valves.

[RoostiusMaximus]

the 86-87-88 valves did have steel and aluminum versions, they also had different port dimensions. I have both here if you want measurements

[bens87braap]

can u compare all 3 would be great

[RoostiusMaximus]

2 of 3 i guess

[bens87braap]

that must be 86 88?

[RoostiusMaximus]

correct. No Idea why the picture is squished looking.

[sandblaster]

I know why it is squished....



If you post a link to a 7.569 Terabyte sized pic, this site will try to reduce the size.
The results can be interesting 

[RoostiusMaximus]

 
thanks

[yeomans]

Roostius,
Just curious how many different styles of operating rods you've come across for the 86-88's ?
I've got three different ones and have always been interested in finding out how many different rods exist.
I was also wondering if you have ever come across a set of steel valves on an 86 model?, I only seem to find them in 87's and 88's

[RoostiusMaximus]

I only have the 2 models shown, I think they are an 86+87 set from what sandblaster and I have discussed. One cylinder has the relief channels above the auxilary ports and the other does not. One has the shouldered crankshaft and the other does not. I don't know which set belonged to what, I bought a box of 3 engines and they were all in pieces.