[Ducati] Which 900 engines had the bad studs

[Ronald Betts]

Suddenly, I feel all warm and fuzzy,,,I love you too Rich.....



Peace...Ron"Desmohead"Betts 95 900 SP
I've learned that I don't suffer from insanity, I enjoy it!





>From: Rich Roberts <bigredxrunner at yahoo.com>
>Reply-To: Ducati Owners Group <ducati at ducati.net>
>To: Ducati Owners Group <ducati at ducati.net>
>Subject: RE: [Ducati] Which 900 engines had the bad studs
>Date: Tue, 2 May 2006 15:52:35 -0700 (PDT)
>
>I doubt you will get much argument on that one. Chasing threads is a ritual 
>with me and I use Electromotive Parts Cleaner for cleaning out holes and 
>about everything. See I have an agreeable side. Ha ha :) Rich
>
>Ronald Betts <ronaldebettsasalc0015 at hotmail.com> wrote:  I guess I have to 
>add my 2 cents worth. As a automotive tech for over 25
>years (now retired) I replaced lot and lots of head bolts which would 
>eguate
>to Studs on a motorcycle. The reason for the replacement was due to the 
>fact
>that the bolts were a expendable part,. The reason was , the bolts were
>designed to stretch with the heating and expansion of the head in relation
>to the block. In the case of Studs it controls the stretch due to the
>expansion of the head and cylinder. Repeated stretch cycles would require
>the replacement of those bolts. Some of them are even rifled to help with
>the stretch. As far as the question of lube on the threads is concerned I
>found that using any lube gave me a false torgue reading leading to bolt
>failure as it would always cause over tourqeing. I am from the school
>(meaning comebacks and poor longivity of repair made) that taught you to
>take the time to make damn sure that the threads in the block were clean 
>dry
>and in good shape. That meant alot of running a tap in the bolt holes as
>part of assembly prep. Once I started doing this the comebacks became non
>existant. This is the procedure used by every top machinest I have ever
>talked to including Pops Yoshimura and the wrenches in the NHRA pits. I may
>be wrong but the evidence is clear to me, Don't Lube the Threads as it will
>lead to a false torque reading.
>And now, let the arguing comence!
>
>
>Peace...Ron"Desmohead"Betts 95 900 SP
>I've learned that I don't suffer from insanity, I enjoy it!
>
>
>
>
>
> >From: Rich Roberts
> >Reply-To: Ducati Owners Group
> >To: Ducati Owners Group
> >Subject: RE: [Ducati] Which 900 engines had the bad studs
> >Date: Mon, 1 May 2006 16:08:15 -0700 (PDT)
> >
> >Uh okay...what does that mean, fastener is designed to stretch to give 
>you
> >the torque? Interesting, since threads are a big part of that torque as
> >well as the amount at head, the thing that always scares me about such
> >things is exactly how do you standardize the procedure of torquing, how
> >much lube on threads, what kind of lube etc etc. As we all know 
>lubrication
> >changes things in a big way. Use too much or the wrong kind and torquing
> >becomes an exercise in futility until that waisted section breaks. Do you
> >work in the aviation mechanics field? Where do you see such fasteners
> >routinely?
> >
> >frugalyankee-cycles at yahoo.com wrote: Some of the 'waisted' fasteners I've
> >worked with over the years are the 'stretch' type (torque to yield).....
> >
> >Brad
> >CT.
> >Ducati On Line thanks its sponsor and friend, Cycle Cat, maker of
> >some of the most beautiful products ever for Ducati's.
> >Visit http://www.cyclecat.com/
> >
> >_______________________________________________
> >Ducati mailing list
> >Ducati at ducati.net
> >http://list.ducati.net/cgi-bin/mailman/listinfo/ducati
> >Mailto: bigredxrunner at yahoo.com
> >
> >Ducati On Line thanks its sponsor and friend, Cycle Cat, maker of
> >some of the most beautiful products ever for Ducati's.
> >Visit http://www.cyclecat.com/
> >
> >_______________________________________________
> >Ducati mailing list
> >Ducati at ducati.net
> >http://list.ducati.net/cgi-bin/mailman/listinfo/ducati
> >Mailto: ronaldebettsasalc0015 at hotmail.com
>
>
>
>Ducati On Line thanks its sponsor and friend, Cycle Cat, maker of
>some of the most beautiful products ever for Ducati's.
>Visit http://www.cyclecat.com/
>
>_______________________________________________
>Ducati mailing list
>Ducati at ducati.net
>http://list.ducati.net/cgi-bin/mailman/listinfo/ducati
>Mailto: bigredxrunner at yahoo.com
>
>Ducati On Line thanks its sponsor and friend, Cycle Cat, maker of
>some of the most beautiful products ever for Ducati's.
>Visit http://www.cyclecat.com/
>
>_______________________________________________
>Ducati mailing list
>Ducati at ducati.net
>http://list.ducati.net/cgi-bin/mailman/listinfo/ducati
>Mailto: ronaldebettsasalc0015 at hotmail.com