[TR] ZS 175 carbs

davgil at aol.com davgil at aol.com
Mon Oct 1 13:14:51 MDT 2018

Thanks Jack.  The screwheads were so buggered, I did not realize that they were a pozidrive head. I did note the short collar for the lock washer, and appreciate the advice.  




-----Original Message-----
From: Jack McGahey <McGaheyRx at aol.com>
To: Creig Houghtaling <creig555 at live.com>
Cc: davgil <davgil at aol.com>; triumphs <triumphs at autox.team.net>
Sent: Mon, Oct 1, 2018 2:56 pm
Subject: Re: [TR] ZS 175 carbs

The screws holding the top cover on the carb are M5 0.8 - I measure 12.4 mm long - M5 0.8 x 12 would work. Having said that, I would (have and will) order the correct ones. A generic replacement will probably have a Phillips head and will be harder to get     out, without damaging the screw head, than Pozidrive on the correct screws. 
The correct screws are unthreaded at the very top where the lock washer sits - they come with the lock washer in place and that lock washer does not easily come off.
The fitted washer and the pozidrive head are big advantages IMHO. I’ll always buy the correct ones.

Jack Mc

Sent from my iPad

On Oct 1, 2018, at 1:25 PM, Creig Houghtaling <creig555 at live.com> wrote:


See if a #10 or #8 machine thread works.  It is one of these, but I don't remember which.  I always buy new bolts and lock washers from the hardware store for carb top covers.  You can buy stainless.  And it doesn't cost as much.

My friend had metric size bolts holding his carb tops on his TR8.  I suspect that was because a previous owner put them in because they were close in size and he just forced them in because they were into aluminum.

What are you referring to for damper 0-rings?  If you are referring to the tiny one at the bottom of the dashpot that holds the dashpot oil around the metering needle, then yes that is a standard size o-ring that you can buy.  The o-ring around the fuel reservoir plug is standard and can be bought too.


From: Triumphs <triumphs-bounces at autox.team.net> on behalf of davgil at aol.com <davgil at aol.com>
Sent: Monday, October 1, 2018 8:44 AM
To: triumphs at autox.team.net
Subject: [TR] ZS 175 carbs

I worked on the carbs on my 1976 TR6 this weekend, one of the needle adjustments screws moved and I was able to lean the carb I needed for some improvement.  A couple of questions, does anyone know the specs on the screws holding the top cover to the body of the carb?  Someone (not me - honest) buggered them up and I had to cut a slot on one to back it out.  I would like to just replace them all.  Moss has them at $1.89 apiece but that seems a bit much.  I had a couple of screws in my loose screw bin that looked correct but did not seem to fully thread into the carb body and I didn't want to force them and ruin the threads.  Also, if the damper o-rings are a standard size that I can pick up at a local FLAPS instead of ordering them, i would appreciate knowing the specs on those as well.  

David Gill
1976 TR6

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