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Home > DIY - Tech Tips - Shorten Triumph Front End / Fork
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| How
to Shorten Triumph / British Forks |
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This
how-to was written and photographed by Joe Zito (scraper
on the JJ), and posted here with his permission. It
covers an easy and free way to shorten your british
front end / forks. This is especially useful to make
your chopper or bobber frame sit nice and level to
the ground with a hardtail that has drop. Thanks Joe!
When
I took the springs out of my fork and let the bike
drop as low as it could go, the tire was about 1/2"
from the lower tree. It didnt make sense to me to
cut the tubes down since that would then let the tire
hit the tree when it was fully compressed, quickly
leading to some heavy crashing. It may be different
on other bikes, but my setup is a '70 TR6C frame with
a '71 fork.
After
a bit of brainstorming and looking around to see what
I had, I came up with this sketch:
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The
drawing on the left is the stock setup with 6.5"
of travel (total) and the one on the right, with the
2" spacer, has 4.5" of travel. still plenty
enough to be safe. You could probably go more or less
depending on the stance or ride quality you were going
after. It all depends on how long the spacer you put
between the top out spring and the shuttle valve is.
Here
are the spacers I made, cut out of the old spacers
that were originally in the fork with the chopper
tubes - making them longer when installed on top of
the main spring.
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| Since
the fork was going to have less travel, I thought it
would be wise to firm up the spring a bit by adding
some preload. I did this by cutting the main spring
a half inch less than i cut the spacers. This makes
the spring sit up above the top tree a bit when it's
in the fork so you have to compress it some to get the
caps on. aka - preloading the spring. |
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| Here's
what the shuttle valve looks like with the spacer installed: |
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here it is being installed into the fork tube: |
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So,
overall it shortened the fork 2". Take into account
how much weight is going on the bike too because it
will have the weight of the motor, gas, oil &
your ass on it.
Here
is the bike with the modified fork and a 4" stretch
/ 2.5" drop hardtail. Overall Iwanted a very
flat stance but low as hell. The bottom of the frame
is about 4" from the pavement so she's right
where I wanted her.
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| The
stock fork tubes were pretty cheap & the "lowering
kit" was free. It took me about an hour, tops to
lower the fork. It's safe, looks good & it's ready
to roll. |
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