[MDairheads] Exhaust Port Thread Question

[b_line750 at verizon.net]

  Looking at the picture, I agree, if it were mine I would grab a triangle shaped file out of the tool box and get busy.  A careful hand should be sufficiant for bringing definition back to the misshapen portions.  Neither file nor die will restore the pitch to its full major diameter.  But a proper shape can be restored without spending a buck.   All ISO Metric threads are set at 60 degrees.  Most every triangle shaped file on the planet is also set at 60 degrees.  Aluminum is quick to clog the cutting surface of a file.  A coarse single cut is best, rub chalk on the file first, this will help prevent it from becoming clogged with every stroke. 

  As Mike has mentioned, use the new nut to further caress the repaired threads.  

 Happy fiddling.  

    Bill.  

> On Aug 20, 2018, at 1:56 PM, Mike Cecchini via MDAirheads <mdairheads at casano.com> wrote:
> 
> Thread file works wonders......it moves metal back to where it belongs vs 
> removing metal as a die does.
> 
> I damaged my exhaust threads so bad I was sure they needed to be cut off and 
> remachined.
> 
> Called my buddy Ted Porter (The Beemer Shop) and he reminded me about thread 
> files.
> 
> 20 mins later I had 90% of the thread in excellent shape......right on the 
> bike.....nothing else.  Done.
> 
> Use lots of Nickel based anti-seize......lots......and work the exhaust nut ALL 
> the way on before you put the pipe on......then go back and forth ......back and 
> forth to get the anti-seize well worked into the threads.  Wipe off the excess 
> and install the exhaust.
> 
> Also use anti-seize on all slip-fits and nuts and bolts.  Everything gets 
> anti-seize.
> 
> 
> ----- Original Message ----- 
> From: "Mark Singer
> 
> I would try repairing with a thread file first, before taking a die to it. Be 
> patient, slow and steady does win some races. Then if all else fails pay 
> someone.
> Good luck
> 
> 
> _______________________________________________
> MDAirheads mailing list
> MDAirheads at mail.casano.com
> https://mailman.dudley.nu/mailman/listinfo/mdairheads