The Mack Sportster. Does it Belong To The Street Or To The Track?

1dpcustoms2dpcustoms3dpcustomsTo both the street and the track will tell you Justin and Jarrod Del Prado, the duo working as brothers and best friends at reputable . A Sportster-based machine that they designed and tuned to excel in all aspects of street and track performance if in the hands of an aggressive and capable rider. As demonstrated by the past features I published, the humble bros have always produced very cool customs, and with this new creation  stay true to their unique style.

4dpcustoms5dpcustomsTo perform, no expense was spared. The motor was rebuilt at the shop with Revolution Performance polished and ported heads, performance cylinders, pistons, and hot Screamin’ Eagle high lift cams. The single fire ignition and coil are by Dynatek. The motor now breathes through a 42mm Mikuni carburetor, with Justin & Jarrod fabbing the tuned 2 into 1 exhaust. All the engine works to create a fresh and beautiful 1250 cc motor now shining in a bright aluminum ultra-thin coating commonly used on firearms.

3bisdpcustoms3terdpcustomsEvery single piece of this bike has been fabricated and engineered to the highest standards. Starting by the rear subframe and the race inspired steel tail section. Correct stance was achieved by lifting the rear with Ohlins shocks and lowering the front with shortened Ohlins inverted front forks. A one-off triple tree, a set of clip-ons and of rear-sets are works of art fabricated by the Del Prados’ pal Shane at Chainsikle. An increase in bike trail and a Scott’s steering damper neatly engineered to be mounted with the arm mounted out of sight contribute to improved riding stability.

15dpcustoms6dpcustoms7dpcustomsDuring the build, the bros obsessed with reduction of weight anywhere possible. First using a lightweight Lithium Ion Ballistic performance battery placed in the tail section. Then, by fitting the Mack with a lightweight aluminum swingarm that they designed at the shop and ordered to be produced by Trac Dynamics, and using carbon fiber BST wheels rolling on Pirelli Diablo Supercorsa (suitable for use on the racetrack and on the road for motorcycles with a top speed of more than 168 mph or 270 km/h)… Both front and rear brakes are Brembo mono blocs activated by ISR master cylinders on Brembo rotors. The adjustable hand controls and turn signal mini switches are also from ISR.

10dpcustoms8dpcustoms9dpcustomsFor details, twin headlamps and turn signals are LED’s. The diamond stitched seat is upholstered in Alcantara, an artificial substitute for suede leather and the ultimate material for aircraft, custom cars, jet and yacht interiors.

Paint by Walkers Way is Porsche’s Carbon Effect and Voodoo Blue on which was sprayed a matte finish clear coat. And if you wonder why this dual street and track Sportster racer is called Mack, it’s because the client is so happy with his DP ride that he swore to never sell it and instead give it to his son nicknamed “Mack”.

The Del Prados kept their original passion for what they do for a living. And it shows. With for consequence that all their clients, without exception, became good friends… (photography @ DP For Patumwan) 

19 Responses to “The Mack Sportster. Does it Belong To The Street Or To The Track?”

  1. 1 Roger Menendes Sep 28th, 2015 at 8:11 am


  2. 2 Ray Meynard Sep 28th, 2015 at 8:30 am

    Great machine

  3. 3 Stony Crane Sep 28th, 2015 at 8:44 am

    Sweet and it actually has real suspension and brakes too!

  4. 4 Woody's Sep 28th, 2015 at 9:36 am

    Love it. Belongs on the street where we can all play ☺

  5. 5 Greeco Sep 28th, 2015 at 9:48 am

    looking great and I bet riding great

  6. 6 P. Hamilton Sep 28th, 2015 at 9:49 am

    Should belong to my garage!

  7. 7 Reyn Mansson Sep 28th, 2015 at 9:51 am

    Nice but you still have a Sportster motor and gearbox.

  8. 8 zipper Sep 28th, 2015 at 10:38 am

    Sportster motor, dependable, simple, plenty of power if modified And CHEAP! 2003 and previous engines have a trap door to remove the gearbox which hasn’t been changed a lot for over 35 years,Fairly strong. Nice bike!!!! ..Z

  9. 9 Jim Castro Sep 28th, 2015 at 10:52 am

    These fabulously talented brothers and I live in the same community. To say that they assemble fine, sculpted and well machined instruments is the understatement of the Century.

    Way to go guys, another iconic machine hits the road from your shop.

  10. 10 Chris Ruggieri Sep 28th, 2015 at 11:13 am

    Great work the brothers.

  11. 11 richards Sep 28th, 2015 at 2:56 pm

    That is a VERY nice bike…really well thought out and executed.

  12. 12 Dave Blevins Sep 28th, 2015 at 5:32 pm

    Very good looking machine. Bravo!

  13. 13 nicker Sep 28th, 2015 at 11:16 pm

    Form following function, as it should.
    Very excellent indeed…… 🙂


  14. 14 Calif Phil Sep 29th, 2015 at 7:39 am

    Very well done. I luv it.

  15. 15 Sportster Mike Sep 29th, 2015 at 7:55 am

    Yes, I’d ride it…might get back ache but I’ll suffer gladly

  16. 16 Sportster Mike Sep 29th, 2015 at 7:57 am

    Come to think of it, its a ‘Ride to Work’ bike.. the long windy, hilly and fast way to work….
    A and B roads as we have here in southern England..

  17. 17 Blackmax Sep 29th, 2015 at 4:36 pm

    Very Nice, for that kind of style !!!
    Be a blast on the twisties
    But not for my old rear end !
    LOL !!!

  18. 18 NoH2oh Sep 30th, 2015 at 2:18 am

    Needs a front fender if not only for looks, and I’d change the oil “bag” to one like on the Buell S2, and while I am on a Knob Creek induced tirade I’d change the over specified forks to a traditional Ceriani or such, but overall I like it. Sad HD will not make a sporty Sportster. Good thing pre-hipster ones are so cheap now.

  19. 19 Buster Sep 30th, 2015 at 6:53 pm

    I like it!!! Good job guys.

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