2 piece head.

[jsachs1]

When you thought you've seen it all.


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[Fugawee]

Ouch...that'll ruin Your day.

[Ohio HD]

What in the world John? Was there nitro involved?

[lilchief]

Curious as to what the cause was on this one. For some odd reason I love seeing crazy things like this!

[Deye76]

What in the world John? Was there nitro involved?

C'mon John, tell it like it is. 

[turboprop]

Have seen this before with S&S Super Stock heads with the oem TC bolt pattern.

[Hossamania]

Gotta work hard to break it that good!

[crock]

  I just wanna know how.   

[jsachs1]

A shop I do heads for sent it over, with 2 new heads. Apparently the bike has been on the road since the late 90's. They are going to find out what they can, and let me know in depth. As I get more info, I'll let all know.
John

[jsachs1]

Made 1 phone call, and low and behold, found out this was a common problem with some S&S 4" bore 100", 107", and 113" engines. I did quite a few of the 4" bore engines, and never saw it before.
John

[Deye76]

Thank You John. I had a 100" S&S motor, has well over 100,000 mi. on it now, according to the guy I sold it to. Since you posted this a couple guys have told me they have seen this. First for me.

[capn]

Was it going down the road when it blew? If so must have been a surprise!

[jsachs1]

Another problem that may surface in the 4" bore S&S engines is, Cylinder Studs pulling out of the case. I have seen that before, and fixed several of them.
 
capn: I don't know. A shop I do heads for sent the broken head, and 2 new heads to be ported.
John

[motorhogman]

I have to ask... Why did they send you the broken head ?

[jsachs1]

I have to ask... Why did they send you the broken head ?

No clue. Certainly not to repair, if that's what you're thinking.
John

[98fxstc]

I am curious about S&S and their concern for their reputation.

Turboprop said straight up, he had seen this before and John confirmed it was a common problem with some of their heads.
How often would S&S step up and replace the heads, when there is a recognized problem with a product, and for what period of time after manufacture ?

[jsachs1]

I am curious about S&S and their concern for their reputation.

Turboprop said straight up, he had seen this before and John confirmed it was a common problem with some of their heads.
How often would S&S step up and replace the heads, when there is a recognized problem with a product, and for what period of time after manufacture ?

Knowing S&S, if this happened within a reasonable period of time after purchase, IMO, they would cover it.   This was sold in the late 90's I'm told, and happened currently. No idea of how many miles.
John

[Fugawee]

It there not going in the Scrap Heap...put them For Sale on Ebay as Official S+S Paperweights.
Somebody will probably buy them.