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  1. #1
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    Default Let's Install some Valve Seats in a 900 Ironhead ... Want too..??

    Looks kinda down there to me....

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    Hadn't did a check on valve stem protrusion just yet, got the new guides installed and need to fit them....

    This Old Boy that I'm doing the job for is not wanting to put much money into the heads...
    If I do all four of them with harden seats will be about 4 C notes above the regular valve job....
    That is the work to do the counter-bore, the price of the seat included and installed ....

    Will have the numbers shortly and let him make the call on what to do...???
    Last edited by Dragstews; 09-28-2016 at 5:35 PM.

  2. #2
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    ..... "Great Cesar's Ghost" .....

    Guess I should had made this thread in the Sportster area of the forum....
    ...... My bad ......

    Aaaaaaa .... Oh You-Who, Mods.... Got a chore for ya....
    Last edited by Dragstews; 09-28-2016 at 6:06 PM.

  3. #3
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    Well riddle me this Batman....... Why didn't you???????

  4. #4
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    Quote Originally Posted by Tattooo View Post
    Well riddle me this Batman....... Why didn't you???????

    ... I'm Senile ... Lol
    (Old age does that to ya... Live long enough and you too will see where I'm coming from.. Or going ... See, don't know if I'm coming or going..???) .. ..

    Last edited by Dragstews; 09-28-2016 at 7:57 PM.

  5. #5
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    LOL Hell I'm there my friend,,,,,,,,,,,,,, LOL

  6. #6
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    Sorry Guys..... Haven't had time to add any contents to this thread ....

    This job is on the back burner for a wee bit...
    There will be three sets of Sportie heads to do...
    One set is the 900 and two sets of 1000's to do....

    The 75 XL heads for the stroker I have 99.5% done... Just some spring packing to do on them and set up the rockers boxes with roller arms ..
    The other is off a 84 year model .... Got oversize valves going in them ... Not all that sure what we have going into them, owner bought them off eBay....

    Just as soon as the Seat & Guide Machine is open (Doing the S&S Knuck Heads in it at the moment) will jump on the 900 first...

  7. #7
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    Well.....

    These are the 900 heads.
    Got around to getting back to this job...

    Installed new guides and fitted them....
    Was in the mode of cutting in the seats..... Did one so far, picked the intakes to do first...
    Just as I thought it would be, the speck for protrusion is way past max... A good .043" past...

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    I only did a light cut on the 45* not wanting to add to going anymore out of speck... Also cut in a radius from the 30* cut to unshroud the valve being they are sitting so low in a pocket.....

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    Called the owner and was telling him that the intakes would be a problem which I already told him that the first time I laid eyes on the heads....

    Well.... He was looking at more problems with the top spring collar digging into the rocker box and the pushrods not going into the ball seat, not to mention the adjustment having no room and rocker arm geometry being way out in left field ....
    After this was pondered, he said to go ahead and install new valve seats......



    Oversize intake valve seat is 2" x 1.687 x 9/32". Can be used with unleaded gas. Replacement size is actual size of seat, which is supplied.
    Fits: XL 1957-1969
    Last edited by Dragstews; 11-25-2016 at 6:26 PM.

  8. #8
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    When I told him I wasn't fond of being forced into doing slop work.....
    He said something about .....



    Think at that point in time. He had been ......



    ..... Yeah !! .....
    Last edited by Dragstews; 11-25-2016 at 8:01 PM.

  9. #9
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    New seats will get the valve stem protrusion back to the low side of specks....

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    One in, one to go ....

  10. #10
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    sportster sportster made of tin ride em out and push em in

  11. #11
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    Well now .... Lol

    This thread certainty seems Old Hat ....
    Guess it's been beat to death so many times before....

    Don't see much need to continual on with it ....



    _______________________________________

    How Old Hat did ya ask .. ??



    This "Old"
    (Yo, Fred .. Wasup ?)
    Last edited by Dragstews; 12-18-2016 at 3:18 AM.

  12. #12
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    Not in the engine game professionally, but I have wondered how many customers balk when rebuilding the old iron.
    Do you see more or less just going with new replacement parts?
    Gary

  13. #13
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    Quote Originally Posted by SurferDude58 View Post

    Do you see more or less just going with new replacement parts?
    Gary
    That's a very good question...

    New replacement parts would be fine if they were made.
    A set of new heads for this year model motor are not attainable and most likely hadn't been seen since the early seventy's....

    Running up on a set of NOS heads, still in the box, would be like finding the lost "Nazi Gold train" or the "Holy Grail"..... Jimmy Hoffa perhaps ..?!?!

    The last run for the 900cc head was in 1969, from 58 to 69 they was pretty much the same head (57 was an odd-ball head with tiny valves) in 70 Harley was in the progress of tooling up to do the 1000cc motors and made the 900 heads with the same size valves and ports as the 72 new larger cc'ed motors... The 70-71 heads are getting to be hard to find these days...

    Not much was available in the way of after/market, Alan Sputhe (Sputhe Engineering) did some wild heads back in the day for the 900's ..



    Those are worth their weight in gold now a day ..!!!
    Mo-Co did a bit of Hot-Roding with offering the XLX performance heads (Dick O'Brien's, head of Harley's race dept., pet project.) as a bolt on replacement, also rare as Hen's Teeth.

    The only choice you have is to reclaim what ya got or hunt the swap-meets for a less worn-out set...
    (That's where these heads came come.. Been a piece together motor from the start.)

    Often wondered how many "New Old Stock" Knuckleheads are still around in the box...???
    (Think they have all been found by now.)

    Cool Video....
    .../// https://youtu.be/Vd7aRTKgLRE \\\...
    Last edited by Dragstews; 12-19-2016 at 12:06 PM.

  14. #14
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    O-boy ... Well Poo

    A bit more of "Old Hat" going on with the exhaust seats....
    Going to have the owner singing "Hell's Bells" again... !!!

    Did a cut to see where the 45* was at...
    Here's what we have.....

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    In the above photo shows not much of a seat due to some previous port work that's been done years ago...

    Photo below shows the contact patch on the valve face....

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    It's all the way out to the edge of the valve face.... looks like maybe can get a seat about .020" wide in the 360* ????

    Valve protrusion is 1.441", Factory Max speck is 1.420...
    Was hoping to get by with only installing intake seats ..... But now that some work has went down on the exhaust and seeing what I'm working with..... "Hell's Bells" ....



    Just wasn't in the cards ....

    Hate to tell him we gotta do seats on the exhaust too, I know I have to listen to him sing the blues ....

    .../// https://youtu.be/HJrZ1LAOLYQ \\\...

    Heard him sing the blues before, nowhere near as good as "The King"..
    (Clusty Ol Fart can't carry a tune in a bucket !!)
    Last edited by Dragstews; 12-20-2016 at 8:05 PM.

  15. #15
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    Why not just use a slightly larger valve? I know they made the .125 oversize exhaust valves at one time.

  16. #16
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    I miss Ed Rowe's products real bad.....

  17. #17
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    Kibblewhite has a 1.630 valve. Probably big enough, and at 38 bucks each - cheaper than seats.

  18. #18
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    ....... MOST ........


  19. #19
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    .... Cool Beans ....

    Just got off the horn with Kibblewhite...
    Those 1.630 are available ....

    Had the thought of using oversize valves earlier into this job, V-T carries Kibblewhite products, but only the poplar line of products...
    Also looked for O/S valves from Biker's Choice, Midwest, Mid USA and a few other dists. Nobody had them...

    Kinda felt like I was beating a dead horse with coming up with some...



    Had to go to the Horse's mouth (So to Speak) to find them... Straight to the manufacture...
    Only made in the Black Diamond format, which is a tad overkill for this motor... But .... They got em...
    Soon to have a set in my hands...

    I'm a dealer for those Boys.. Hadn't been a dealer with them very long, just only for about 8 years, was a dealer for Rowe's for around 25 years... Ed made many diff. sizes O/S valve heads for saving a seat... Sure do miss that Boy (RIP) ..

    Much Thanks bohica2xo for the heads up....
    Last edited by Dragstews; 12-21-2016 at 12:36 PM.

  20. #20
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    You are welcome Jesse.

    Black Diamond is never overkill. That nitride coating is slippery - carbon does not stick well, and it can really help to keep he glowing carbon out of the ironhead chamber...

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