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Home > DIY - Tech Tips - Exhaust Pipes for a Triumph
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| Custom-Built
Exhaust on a Triumph |
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This
is an add-on to the first Custom-Built
Exhaust Pipes How-To article by McGoo
at Biltwell,
Inc. Kyle at Lowbrow Customs is working
on his Triumph, a '77 T140V motor in a '70 front loop
with a David Bird hardtail.
He is using the Biltwell
Custom Exhaust Pipe Kit, which contains
1.75" OD exhaust pipe and assorted HD exhaust
flanges.
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The
same principles are used from McGoo's article, including
starting at the head (in this case a piece of 1.75"
tubing that fits over the exhaust spigot on the head),
and working your way back, cutting and tacking pieces
of tubing to get the proper angles and curves you
want.
The
spigots on a Triumph head are 1.65" outside diameter,
and the inside diameter on the exhaust kit is about
1.64". To be able to clamp the pipes at the head
you can just take a grinder with a cut off wheel and
cut a .5" notch into the pipe on either side,
that allows it to fit over the spigot then compress
when you tighten the finned clamp at the head.
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| This
entire set of pipes was completed from start to finish,
including the time to figure out a design, in a Saturday
morning, about 4 hours not including the final mounts
on the rear of the frame for the exhaust. It was completed
with a TIG welder, a cut-off saw, 4" grinder, some
flap discs, a couple files and a sharpie marker. |
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| Keep
checking the fit of your pipes as you go, and as you
complete a section you can grind the welds down for
a nice smooth finish. Spend the extra time getting proper
fitment before you weld to ensure a nice, seamless look. |
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The
right-hand pipe that crosses over the the left-hand
side is made of 7 individual pieces. Kyle eyeballed,
marked, cut and fit each one with trial and error.
He used the shovelhead flanges from the Biltwell kit
towards the rear of the pipes to be used as mounting
brackets by welding some tabs to the frame, and finished
the pipes off with a set of 1.75
OD Brass Exhaust Tips.
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| So
with the exhaust kit, some basic tools and some patience
a unique set of custom pipes was finished on half a
Saturday, with exhaust tubing and a bunch of flanges
left over. Kyle's fabricating tip: if you plan
on welding all weekend check your argon so you don't
run out on mid-day Saturday. |
| A
great piece of advice from Derrick (hatchethairy on
the JJ): "For all you tig-tackers, try using
some hose clamps with holes drilled in it to hold your
place while you tack. trust me, it makes a world of
difference in time when fitting and welding a set together." |
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