The James Sheppard Chronicles Part 8
C'est fini! My Ninja 500 has come full circle and the final form is
fairly close to what I had in mind way back in Article #1. While it doesn't
look like Chandler's Superbike (option 1), it does have a neo-retro look of a
Ducati 900 CR (work with me here) of the cheaper option 2.
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One of the last changes I made was to upgrade the original OEM shock to
a higher performance Showa unit from a GSX-R 750. Instead of simply being
adjustable for spring preload, my bike now has adjustable compression
and rebound damping as well. Hopefully now the rear end will match the
higher-performance front forks. The installation was fairly
straightforward, aided by advice, photos, and parts from
www.Sport-Twin.com's EX 500 mailing list. As you can see from the
photos, the GSX-R shock is much more substantial than the stock unit. The
Suzuki spring had to be swapped out with a 310-lb Fox spring to deal with the
lighter Ninja. Both ends of the shock required minimal machining to
fit, and the suspension linkage had to be spaced slightly apart to make room
for the larger diameter spring.
As equipment is improved, fiddling is the next step. I've found that
the front spring preload has to be cranked up significantly to prevent dive
under braking. The rear seems to be set up fairly well, although no
serious riding has yet taken place. I'm waiting to properly scuff in
the tires before I really attack the local twisties (as limited as they
are). As it stands, the Dunlops are so far removed from the stock Bridgestones
that the bike feels entirely different and the Sargent Seat improved
comfort significantly.
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In as sense, it is a different machine. Nothing affects a bike more
than different legs. Racers advise working on tires and suspension first,
and leave expensive engine mods until rider skill improves. That's what I
hope to do this summer. The Manitoba Roadracing Association is holding a
track day on May 24 at Gimli, so I'll see how far I can get the bike cranked
over. Likely I'll use the locals' expertise to further fine-tune the
bike. I've noticed some other EX/F2 hybrids have the fork tubes set higher in
the triple clamps (more tube showing on top) for improved handling.
Now it seems the bike turns in slower, so I may experiment in this area myself.
My own "expensive engine mods" have been limited to a Muzzy pipe. I
installed it without the jet kit in order to establish a jetting base
line. There is a noticeable flat spot from 4500 to about 6500 rpm, and some
popping after shutting off the throttle at cruising speeds.
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The bike is due for a valve adjustment, and at that time I'll re-jet
(with Dad's help) and change the fluids. I also have to fine-tune the aim of
the headlights and mount the toolkit in a more accessible place as the solo
tailpiece tapers sharply at the rear, taking up space once used for the
kit. I hope to buckle the kit to one of the stays for the front
fairing.
So after about 6 months of cold-fingered, hot-chocolate fuelled work in
an unheated garage (along with bewildered stares from the local
townsfolk), my
bike is done. Now I don't know what to do. Really, I should cut up my
Visa card and enjoy what I've got. In the back of my mind, though, custom
rear-sets, a braided rear brake line, and some faux-carbon doodads
beckon. What they say is true, I guess.... a project bike is never done. Now
where did I put that catalogue?
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James Sheppard
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