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Re: Drilled 'Black Caps'

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Re: Drilled 'Black Caps'

Posted by mike_steer at April 03. 2017

Just bought (see pics) these to put on the '75 Mk3 850 I am rebuilding. These were advertised as NOS and from the condition internally and externally clearly haven't been used.  Can anyone shine some light on the holes drilled in each end, and why they were left chrome on the ends.  On both silencers the holes are in the same position as if drilled using a jig. My line of thinking is that the original Black Cap was de-riveted from the main silencer, removed and this is what you will find as standard under the removed cap(s).  In comparison I have a Trident T160 but the Black Caps seem fixed permanently.  Your thoughts

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Re: Drilled 'Black Caps'

Posted by richard_payne at April 03. 2017

Do they have the full annular discharge blurb impressed on the outside ?

Re: Drilled 'Black Caps'

Posted by mike_steer at April 03. 2017

Previously richard_payne wrote:

Do they have the full annular discharge blurb impressed on the outside ?

 

Nothing at all which probably suggests they are patterns of some description

Re: Drilled 'Black Caps'

Posted by mike_steer at April 04. 2017

Previously mike_steer wrote:

Previously richard_payne wrote:

Do they have the full annular discharge blurb impressed on the outside ?

 

Nothing at all on the silencer body which probably suggests they are patterns of some description.  I have to say though they are very well made.  The only company I can find who made them with 'unpainted' end caps are Armours (Bournemouth).  I know from previous experience that they do make a good product.  The large holes probably drilled as an after thought by a previous owner who possibly was thinking it might improve performance, make the exhaust note louder or both of course?

Re: Drilled 'Black Caps'

Posted by james_murray at April 13. 2017

heres some photos of 06-4170 original mufflers with black caps

one has the cap removed

one has the cap

one has a different cap

notice the patent info are in different areas.

 

Re: Drilled 'Black Caps'

Posted by james_murray at April 13. 2017

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Re: Drilled 'Black Caps'

Posted by james_murray at April 13. 2017

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Re: Drilled 'Black Caps'

Posted by james_murray at April 13. 2017

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Re: Drilled 'Black Caps'

Posted by james_murray at April 13. 2017

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