I'm looking for the stock measurement of the protrusion of the intake and exhaust valve from the spring seat to the valve tip as shown in the pick below.. I currently have for the intake 2.090" and the exhaust 2.140"..
I'm trying to correct my rocker to valve geometry.. Thank you..

edited: I should have stated that I've had extensive stage 4 work to these heads and that the seats were sunk way up into the heads with 2.020" intakes and 1.630" Exhausts and trying to keep the combustion chambers at 85 cc..

 

dont know which bike we're dealing with but i just looked up the protrusion spec for a 2007 softail,,,,max is 2.069. If above that it says you need a jnew head or a new seat installed and set up. i'll go back and look at the 2013 dyna book and see if that's the same.
m
its the same for the 2013 dyna, if protrusion exceedes 2.069 replace valve, seat or head as required.

 

Hey thanks for the information Marco., I didn't realize something like that would be in the regular service manual but it is.. So I looked it up and for stock valves and the distance be between 2.012-2.032"..
So what I'm going to do to try to correct the valve geometry is put in a new rocker shaft support plate that has raised rocker shaft center line of .040" over the stock spec to help get the geometry between the rocker and a valve to back to stock..
Vulcan Works in New Hampshire said they would help me out.. Not going to go crazy because I'm not sure what the clearance will be inside the rocker cover.. Also I'm going to be going with roller rockers..

 

you might be able to find shorter valves as well, just a thought.
m

 

I actually have shorter valves in there.. intake 4.445" ..
I think I have a pretty good handle on it with the rocker support plates that I'm ordering and the roller rockers.. We'll see what happens when I get all the parts here and the heads repaired and go from there.. thanks..

 

I'm going to call KMPI and AV&V today to try to match a shorter valve..

 

So I called both AV&V up in Quebec and KPMI Kibblewhite.

​​​ I was able to speak with the tech at AV&V who's English wasn't too bad and I was able to understand, very nice people by the way.. At first I didn't realize I was calling Quebec but anyways I got a lot of really good information out of them as to how to reduce the valve protrusion and also what spring pressures I should be setting with Woods cams.. They suggested either the shorter valves or change the seat depth to decrease the protrusion.. I found a shorter valve so I'm opting to go that route.. They asked me what cams I'm using and I told him the wood scams and at that point he said that they definitely require a higher spring pressure and say an Andrews or S&S and to set 195 to 200 PSI valve on the seat and anywhere from 420 to 450, valve open because of Woods aggressive ramps..

Keep in mind that on the front cylinder head that broke the rocker plate it appears that the top half of the stem of the exhaust valve is what got bent a slight amount which I believe was due to sideload, because on initial installation there is quite the drag trying to get the valve up through the guide but once partially through the guide, the valves moved very freely..

So on the intake valves that had the valve tip ground down, the overall length was 4.441" which yielded A protrusion of 2.084" that is just above the outer limits and I believe is acceptable..

However the exhaust valves are a different story.. Both front and rear exhaust valves had a valve protrusion of 2.130" that is way too high and really changed the rocker geometry to the point that it increased the side load on the stem and also changed the pushrod location in the pushrod tube that was way off center which was also increased by the large amount of shaving the heads lowering the entire head and rocker assemblies.. Yes I had to hand fit the intake..

So it looks like I'm going to be replacing the intake valves with Kibblewhite 20-20990, 2.020" which has an overall length of 4.440" and should be a direct swap in because the stems are identical thickness.. As for the exhaust valves I will be using a kibble-white #20-B101, 1.615" That has an overall length of 4.460" and also has the same stem thickness at .3096".. This valve is .065" shorter than my current exhaust valve but it's also smaller in diameter (current is 1.630") so I'm going to have to have the seats replaced but the guides should be okay..

Couple all this with a custom machined rocker mount that has an increased height of .040" On the rocker shafts center line that will vastly improve my geometry and hopefully smooth things up a little bit.. I'm also going to go to roller rockers to help decrease the side load on the valve stems..

This is the best plan I could come up with if anybody else has any ideas I'm willing to listen... All in all I'm going to end up having close to $2800 into these heads Not to mention the labor and gaskets and everything else involved to get it to the right place... Crazy isn't it... Thanks..

 

Baisley's also does corrected geometry rockers.

 

https://www.hdforums.com/forum/engin...l#post20493473


Valves don't bend from too much side load unless the rocker end is slipping off the end of the stem.

 

I have called Don and the cost of repairs through him would be out of my budget..