2008 D'Ultimate DD Custom

A Dave Dupor Custom

Dave is in the process of producing his air-ride system as a kit for people who want to make a front and rear air-ride bike in the cleanest way.

Most of the time you won't find anything between the downtubes, but here Dave wanted to add a custom downtube grille in black.

A nice feature is the frame having a Schrader valve that can be used in case of compressor failure. Just remove the cap and pump the frame as you would your tire, then press the illuminated toggle switches and you're on your way.

The rider has complete control of the suspension. If he/she wants it stiffer in the rear and softer in the front or vice versa, it is possible.

One look at the sweeping curves of Dave Dupor's "Lowlife Trader" custom and Edvinas Arkusauskas had found his dream bike. It wasn't until a year later that Edvinas approached Dave again to finally have the bike built. "I made his dream bike a reality," said Dave, owner of DD Custom Cycle (DDCC) in Lake Villa, Illinois. "Some people are big talkers and say they want something, but nothing happens. He [Edvinas] came back to me a year later and was like, 'You remember me...'" Two months later the "D'Ultimate" bike was finished just in time for the show season.

Hidden lines, seamless molding, and a smooth-flowing appearance are just a few of the ideas Dave had in mind for this bike. It was going to be very similar to the Lowlife Trader bike except Dave wanted to take it to the next level with features such as an air-ride system. Starting with an '07 ICI Lowlife frame with 7 inches of stretch in the backbone, the neck was raked to 40 degrees. Dave then made a new swingarm for this ride. The bike has a DDCC complete front and rear air-ride system. "The front suspension is comprised of Tricky Air canisters on their Springer frontend, while the rear is supported by a Legends rear airbag system," said Dave.

Designing the air system is where Dave's mechanical engineering background and more than 15 years of experience tuning and customizing cars and motorcycles came in handy. Dave made the framerails and uptubes from the rear of the chassis, along with a drilled-through crossmember that connects both framerails to gain twice the volume-in the air storage tank. To simplify the system even more, he installed an Air Ride Technologies compressor with a 120-psi pressure switch that automatically refills the frame upon demand and automatically shuts off when the frame reaches 120 psi. It's very similar to car and truck systems-no more holding the toggle switch for 30-45 seconds and draining your battery. The compressor only operates when the key switch is on. The main heart of the system is the ARV-2500 Big Red Valve Assembly, which is fed by the frame supply, then divides it to the front control and the rear control. Dave installed a Dual Needle 150-psi gauge that displays the front and rear air systems independently of each other. The valve body is a completely self-contained system that does not need maintenance, lubrication, and so on. All the air lines are 1/4-inch DOT high-temp hoses that semis use. The frame even has a Schrader valve (standard tire/ball valve) that can be used in case of compressor failure.

Dave went on to explain that when considering both front and rear air-ride systems, you have to think about two compressors, twice the number of fittings, and more hoses and areas for leakage. "This system has half the fittings and only one compressor," Dave said. "The biggest advantage is the rise time, which is very critical. The rise time now from ground zero to almost 4 inches is from one to three seconds 'fast' and you can raise or lower the frontend about three to four times on one frame fill. This eliminates the original problem of battery drainage. Sure, you have it and you want to show how it works, but the more you show it the more the battery drains. No more having to hold the toggle switch up and down to pump in real time or vice versa." Although the system may sound somewhat complex, Dave claims it is pretty simple to understand and diagnose.

Aside from the innovative air-ride system, Dave also worked up a laundry list of design ideas he had bouncing around in his head and got straight to work. Since Dave knew that Edvinas would be making the rounds on the show circuit with his bike, he went all-in with a show-polished diamond-cut S&S; 113ci motor, with spent gases handled by a custom exhaust. When it came to sheetmetal, Dave wanted a smooth-flowing look, so after pounding out a custom fuel tank and rear fender, all the tins were sent to Mike and Nick Ellul from MNK Custom Works for a HOK treatment of black and silver paint with inlaid silver leaf. Jim Ross worked on the graphics and the blood-red piping on the tank and fender. Other details that followed suit are the DDCC triangle motor mount/key switch housing, custom handlebars, and chain guard as well as the one-off RMD Billet Smooth 9 chrome and black three-piece wheels.

It seemed just as soon as Dave unveiled the D'Ultimate bike to Edvinas, the custom was already entered in bike shows and taking Best in Show trophies. "I remember his reaction when he saw the bike," Dave said. "He was speechless." Dave continued, "It's funny, you never know with some people, big talkers or not. You should treat everybody equal because you never know when they'll come back."

SPEC SHEET
BIKE OWNER Edvinas Arkusauskas
SHOP Dave Dupor of DD Custom Cycle (DDCC)
PHONE (847) 356-8053
WEBSITE www.ddcustomcycle.com
YEAR/MAKE/MODEL '08/D'Ultimate/DD custom
FABRICATION Dave Dupor/DDCC
ASSEMBLY Dave Dupor/DDCC
BUILD TIME Two months
ENGINE
YEAR/MANUFACTURER '07/S&S;
TYPE/SIZE Evo/113
BUILDER S&S;/DDCC
CASES S&S;
CYLINDERS S&S;
HEADS S&S;, diamond show-cut/show-polish
ROCKER BOXES S&S;
CARBURETOR S&S;
AIR CLEANER Wimmer Machine
EXHAUST DDCC LML Chrome
TRANSMISSION
YEAR/MANUFACTURER/TYPE '07/Rivera Primo/RSD six-speed
CASE Polish
CLUTCH BDL ball-bearing style
PRIMARY DRIVE ICI Inc.
FRAME
YEAR/TYPE '07/ICI Lowlife
RAKE 40 degrees
STRETCH +7 inches backbone, 0 up
SUSPENSION
MANUFACTURER FRONT Tricky Air Springer
YEAR/TYPE '07/Tricky Air
MODIFICATIONS DDCC Air System byAir Ride Technologies
MANUFACTURER REAR N/A
SWINGARM DDCC/Tricky Air
SHOCKS ICI Legends airbags
WHEELS, TIRES, AND BRAKES
MANUFACTURER FRONT/TYPE RMD/BilletSmooth 9
SIZE-WIDTH/HEIGHT 21x3.25
TIRE/SIZE Metzeler/120/70 R21
CALIPER PM four-piston
ROTOR RMD Billet Smooth 9
MANUFACTURER REAR/TYPE RMD/BilletSmooth 9
SIZE-WIDTH/HEIGHT 18x10.5
TIRE/SIZE Metzeler/{{{300}}}/35 R18
CALIPER PM four-piston
ROTOR RMD Billet Smooth 9
FINISH/PAINT
COLORS HOK Black/Orion Silver/ Black Diamond
PAINTER Mike and Nick Ellul/MNK Custom Works
GRAPHICS Jim Ross/Letters, Lines, Designs
MOLDING Nick Ellul
CHROME PLATING Star Chrome
POWDERCOATING J&J; Powdercoating
ACCESSORIES
FRONT FENDER None
REAR FENDER DDCC
GAS TANK DDCC/Westbury Hot Rod
OIL TANK ICI
HANDLEBARS DDCC/PYO
RISERS DDCC
MIRRORS N/A
HAND CONTROLS PM {{{Contour}}}
FOOT CONTROLS ICI/DDCC
FOOTPEGS ICI/DDCC extensions
HEADLIGHT Eurocomponents
TAILLIGHT DDCC LED
TURN SIGNALS N/A
LICENSE MOUNT DDCC/PYO
SEAT DDCC/Vintage Stitch