Step - Geelong Harley-Davidson

dyna twins
This pair of tuned Dynas complement
each other and their builders ...
J STorY brumby J picS LOu mArTIN
Step into the workshop at Geelong Harley-Davidson and you’ll soon realise
that Bruce and Podge, the blokes who run it, are dyed in the wool, fully paid
up members of the Horsepower Club. Everywhere you look there are motors
being built into hot-rods or complete bikes awaiting surgery. These fellas know
their stuff, a fact backed up by the large dynomometer located at the rear of the workshop.
And they both run hot FXDX Dynas as their everyday rides.
Bruce is the owner and builder of ‘Zappa’. This bike was a complete re-build, starting
with a ’99 rolling chassis. To retain the excellent handling characteristics the Dyna Sport
is renowned for the frame was left stock but Bruce added Fournales shocks down back
as well as a set of Race Tech fork springs and Gold Valve cartridge emulators in the forks.
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dyna twins
GUTS&BOLTS
ENGINE
Motor: .................103ci H-D Stroker
Heads: ............ SE HTCC CNC ported
...... 0.032” squish, decompressors
Pistons: ...........................SE Stroker
Oil pump: .............................Feuling
Lifters: ..................................Feuling
Cams: ....................................SE 260
Ignition: ......................SE selectable
Carb: .....................Mikuni HSR 45mm
Filter: .....................Taylor Super Stack
Exhaust: ...............2-1 RB Racing LSR
............................................ 2” headers
WHEELS
Front: ...............Ness Fat 40 3.5x18”
Rear: ..............Ness Fat 40 4.25x18”
BRakES
Front: .............. BRakING 13” floater
Rear: ............ BRakING 11.5” floater
FRaME
Type: ........................ ’99 FXDX stock
Rear suspension: ............Fournales
Forks: ............. 39mm Narrow Glide
Fork springs: .................. Race Tech
Damping: ..... Gold Valve emulators
Fork brace: ..........................custom
Handelbars: .............Ness flat track
Instruments: .............Dakota Digital
PaINT
Black base with rainbow flake and
two-tone gret ghost flames by
Nardi Panels, Geelong
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He also designed and made the one-off fork brace
which doubles as a fender support.
The eye-catching wheels are FAT 40’S from Arlen
Ness. The 40 refers to the number of spokes and both
wheels are 18 inch, the front a 3.5 and the rear a 4.25,
each running Metzeler rubber. The rear rim is the
widest that will fit in a stock ’99 Dyna frame.
Next, Bruce turned his attention to the brakes. The
stock Dyna calipers were not going to be up to the job,
given he was planning on doubling the horsepower, so
after consulting the Braking catalogue he opted for a
set of 13 inch floating discs up front squeezed by four
piston calipers. The rear brake is a similar set-up with a
custom bracket for the caliper.
With the rolling chassis taken care of Bruce turned
his attention to the item of prime interest to a horsepower
junkie; the engine. The Twin Cam 88 was stripped
and then re-assembled with the best aftermarket and
Genuine parts that Bruce knew of.
He started with a Screamin’ Eagle 103 cube stroker
crank and fitted SE stroker pistons to suit. Genuine SE
HTCC heads, with decompressors, were modified for a
.032” squish band to suit the pistons. Bruce is coy about
the compression ratio but it is well above stock.
Many of you will have heard of Feuling oil pumps.
They are not cheap but are renowned as being the best
in the business and Bruce had no hesitation in choosing
one for Zappa. He also specified Feuling lifters to go
with the SE 260 cams. A Screamin’ Eagle Selectable
Curve ignition lights the fire and a 45mm Mikuni, fitted
with a Taylor Super Stack, feeds the beast. The exhaust
is an RB Racing LSR unit with two inch headers, which
sounds simply magnificent. Starting is accomplished
with the help of a 2KW starter motor. The end result of
all this work resulted in 121 rear wheel horsepower and
believe me, you can feel every one!
At Bruce’s invitation I rode his Dyna down to
Queenscliff for the photo shoot. Starting the beast was
an easy job, with the help of the heavy starter motor and
decompressors, and it sat there at a fast idle sounding
more like a NASCAR than a daily rider. Twist the throttle
and it revs like Pro-Stock bike, the revs rising and falling
fast. Bruce reckons his motor, although it sounds mean,
is docile and easy to ride quietly and he was right. I
trickled into the traffic just itching to give it a big squirt!
Once out of town I rolled on the throttle and the big
motor exploded into life. It ripped through the gears
and settled into a smooth, fast cruise. Overtaking was
merely a thought process and then the big brakes
brought the speed back to sanity.
I’ve rarely ridden a road bike with that sort of power.
The124 S&S is similar and so is a Patrick 125 but this
motor is 103 cubes! Bruce reckons the secret is in the
combustion chamber and big compression and big
THE BLaCk RaINBOW METaLFLakE PaINT
WITH GHOST FLaMES SPaRkLED IN THE
SuN FOR LOu’S CaMERa ...

Two good looking bikes – shame about the owners!
(just kidding fellas).
cams but with the mixture and ignition timing carefully
dialled in. Shows the value of a dyno, eh?
Riding back along the Bellarine Peninsula, the big
103 motor could be run down to 50 kays in top yet still
pull away easily, without pinging, if required. Zappa
runs on pump 98 octane and only chews fuel if you give
it plenty.
I returned Bruce’s bike, very impressed. It had everything
I value in a motorcycle; big power, great handling,
powerful brakes. The Ness flat track handlebars suited
me and the black rainbow metalflake paint with ghost
flames sparkled in the sun for Lou’s camera.
Greg wants to thank his best girl Sandy, Sam Nardi
for the paint, Foxy for the machining, Greg for parts and
Danny for cleaning. Oh, and Frank Zappa! HD
rED oNES Go FASTEr…
PODGE GOT THE DyNa BuG after running in a ’99 Wide
Glide with a 95 cube kit, Mikuni carb and SE211
cams and he vowed then that the days of his Evo
Softail were numbered. He picked up his FXDX with
2500 kays on it and “stock as a rock”. He began his
changes with a Mid-Glide front end and swapping the
bars and cables to parts more to his liking. When it
came time for the engine work he and Bruce spent
many a lunchtime discussing what he required from
his engine.
Finally, the decision was made to fit Screamin’
Eagle heads, SE257 cams, 42mm Mikuni carb, SE
ignition and coil, S&S crankcase reed valve and a
Supertrapp 2–1 exhaust. Capacity remained stock at
88ci and first time on the dyno it ran 95hp and 85ft/lbs,
at the back wheel. Impressive figures for a 1450!
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