Harley Sportster 1200S Scrambler – BikeBound

MX-inspired Sportster scrambler from Function Constructed Moto… 

Final week, we featured the Sportster 1200 Journey Scrambler from Australia’s Function Constructed Moto, constructed for workshop proprietor Tom Gilroy to experience throughout Tasmania for the movie Vast of the Mark.

This V-twin “Tasmanian Tractor” regarded wonderful, and the specs have been fairly spectacular for a machine that began life as a 589-lb freeway cruiser:

• Moist weight: 225 kg / 496 lbs
• Floor clearance: 210 mm
• Entrance Journey: 180 mm
• Energy: 65 whp

Compared, the ’06 BMW R1200GS weighed 496 lbs moist, with 190mm entrance wheel journey and 185mm floor clearance. 

Extra importantly, Tom’s hand-built Harley journey scrambler carried out effectively on the journey, dealing with all kinds of Tasmanian terrain:

“The Journey Harley Sportster scrambler proved itself time and time once more on the Vast of the Mark movie journey. Dealing with nearly any terrain. The one time I actually struggled was in actually tender sand, however that may very well be put right down to my abilities as a rider too.” -Tom

After the journey, Tom returned dwelling to start work on a second Sportster scrambler, this time for a shopper, Ben. Whereas the Vast of the Mark scrambler was constructed from a rubber-mount ’06 Sportster 1200C, the donor for this construct could be a hard-mount ’98 Sportster 1200S with twin-spark heads:

“Whereas these bikes share the identical core DNA, they’re vastly totally different by way of fashion, and efficiency… I wished to push additional by way of the design on this one, making a extremely distinctive Motocross really feel throughout the entire construct.” -Tom

Your complete entrance finish comes courtesy of a KTM 1190 Journey, whereas the rear is working a Trac Dynamics billet swingarm and Öhlins shocks — each ends tuned by native off-road suspension guru Charlie Costanzo of Costanzo Racing. Tom says beginning with top-shelf parts and getting them correctly adjusted to work with this particular bike makes the Sportster a dream to experience.

The bike rolls on a 19″ / 17″ wheelset with HAAN hubs and Excel rims, additionally sourced from the large KTM journey bike, full with the double-disc Brembo entrance brakes.

As soon as once more, Tom went with a jetless Lectron carburetor, mating it to a brand new iteration of the customized airbox he developed for the primary construct:

“Model 2 sees the arrange utilizing a Ducati 1299 aftermarket air filter from DNA filters, a hand-crafted filter mount, and a 3D-printed carbon filament consumption plenum that hyperlinks the 2. A bit extra work went into this one, however as soon as the Concept labored on our first ADV Sportster scrambler construct, it was time to enhance the efficiency of it.”

On the exhaust aspect, your entire system and silencer have been fabricated in-house from 1 5/8” stainless-steel tubing, snaking across the pillion pegs requested for the proprietor’s son:

“The concept was to create a Dakar-style exhaust that swung low, however was left exiting lengthy and excessive…working across the pillion peg mounts that have been a buyer spec’d merchandise so he can take his son for a hoon every now and then. The two-1 system and customized muffler sounds good on the thumping V-twin.”

 

The engine was stripped and rebuilt with dependable efficiency as the primary purpose. With delicate cams and port work, together with the Lectron carb and customized 2-1 exhaust, the Sportster put down a stable 75 whp with a correctly fats torque curve.

The tank is from a 2018 Avenue Bob, whereas the fenders, fairings, entrance quantity plate, and fork shrouds have been primarily hand-shaped from aluminum. Then there’s the customized tail part and saddle — Tom’s favourite a part of the bike:

“Sharp and skinny, the tail protrudes out from below the seat, giving the bike a contemporary filth bike edge. Some built-in lighting and hidden mounting hold the end extremely clear. The seat is about atop an remoted mounting body, rubber mounted to restrict the vibration the rider will get by means of the seat.”

Tom ditched the unique battery field and canopy for a late-model unit, mounting it to the body through a hinge part that unlocks with ¼-turn fast releases.

“The quilt permits entry to the ignition module, electrics and has room sufficient for that instrument package you’ll inevitably want for the duration of your driving life.”

The off-road pegs have been mid-mounted on stainless brackets constructed off the case bolts, and the additional offset on the clutch aspect left room for one of many trickest bits of the construct — a small leather-based pouch with onboard air compressor.

“Truly actually helpful if you experience off the seaside, and again onto the bitumen [asphalt].”

A set of 5″ risers, rubber-mounted to scale back rider fatigue, maintain a pair of Professional-Taper Outlaw bars outfitted with ISR levers and PBM swap blocks and scrambler mirrors.

 

For the paint and end, Tom had sketched out a twin bolt design on the tank he appreciated, however he wished to provide the entire bike that very same taste.

“I enlisted the assistance of Josh from Journey Design Co. He got here and hand-templated the Sportster’s panels and labored up an epic customized graphics package…black, gray, and pink ending off that observe aspect flavour.”

All in all, this Sportster scrambler / avenue tracker weighs in at 203 kg (448 lbs) dry — 42 lbs lighter than inventory — with 75 whp on faucet. Tom says he’s discovered a ton from these two builds, and he can’t wait to construct the subsequent one:

“If you’d like considered one of these monsters in your storage, get in contact, I’ve obtained loads of new concepts to make use of on the subsequent Off Highway Sportster.”

Extra Pictures

Observe the Builder

Net: www.purposebuiltmoto.com
Instagram: @purpose_built_moto
Youtube: youtube.com/c/purposebuiltmoto

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