Old Speedway Racing Inspired And Superbly Crafted

0LC1LCChallenging conventionalism and exploring the unfamiliar to honor individuality should be the motto of all custom builders. On each of their creations… Among those who succeed, project after project, is Jeremy Cupp from . A builder with a “can-do” attitude, always avid to learn new skills to create his 2-wheel dreams.

“Seven”, his latest creation, is a successful exercise in engineering from parts that never met before on the same motorcycle. A very innovative machine loosely inspired by the Harley-Davidson CAC Speedway bike used in the 1930’s by brave men racing under the lights on tight dirt or cinder ovals in the golden age of speedway racing.

2LC3LCTo create an original timeless new racer inspired by the old ones while still respecting the tradition and the craftsmanship of an era gone by, is not easy task. As always on all his projects, Jeremy Cupp started by choosing engine and wheels. For rolling with the correct stance, a pair of tall ones, 23″ front and 21″ rear was an obvious choice. For motor, evidently a vertical single, but of course not something off the shelf. An admirer of the work done a few years ago by Chris Barber with his “DesmoHarley” engine (putting Ducati 900ss Desmo heads on a pair of Axtell cylinders, Carillo Rods with flat top Keith Black pistons) Jeremy decided to create his own motor, using a 2001 Buell Blast (500 cc) as his starting point.

4LC5LCThe “Seven” (because it’s LC Fabrications 7th very fancy project) is built with the kind of engine that will make motor heads all twitchy just looking at it. As Jeremy describes his work: “The entire cam-chest was modified to use a series of idler gears to drive the lower belt pulley. The Ducati 750 ss cylinder head had also been heavily modified to take its place on top of the factory Buell cylinder. And in order to set the engine vertical instead of forward leaning, I “back-halfed”the cases and mated up a 1959 pre-unit Triumph transmission which I modified to use a hydraulic clutch slave from a modern Triumph…” Shifting is one down, three up. 

6LC7LCThe lugged style looped hardtail frame was done from .120 dom and setup with a 32-degree neck rake. The front end that Jeremy calls “The Hydro-Springer” is an attempt to build a Springer that both looks and handles great. The rear leg is a modified 32mm inverted Showa where the springs have been removed so they are dampeners only where the scratch built springer portion carries the load…(Jeremy Cupp is working on a small production run of these sets in a stock HD narrow glide configuration.)

9LCThe sheet metal is all polished aluminum and there is also a story behind it. Asked a few years ago by the media about the square tank design on a previous well known project called “Old black”, Jeremy replied honestly that he didn’t know much about sheet metal massaging, and that a square tank was all what he was able to produce. Since then, he learned…As proof, the “Seven”’s gas tank is fully polished with absolutely no filler to be found on it. Nearly every piece small to large was also made by himself,

8LCRear braking is via a perimeter rotor. Thanks to two separate Jaybrake calipers and to two separate master cylinders, foot brake is the primary and hand rear brake is for holding on the hills. Always motivated to learn new skills, Jeremy bought a sewing machine and learned upholstery, producing himself the “Seven”’s hand tool seat. He thanks Jo Cooper for answering all of his questions through the learning curve. “Seven” is a 2-year job and will be honored by being displayed during all the Sturgis Rally at the new Michael Lichter’s Exhibit at the Buffalo Chip. . (photography @ Holly Marcus for JeremySumpter)

31 Responses to “Old Speedway Racing Inspired And Superbly Crafted”

  1. 1 bludog Jul 20th, 2015 at 8:19 am


  2. 2 George Bressant Jul 20th, 2015 at 8:30 am

    Amazing work.

  3. 3 Drake Jul 20th, 2015 at 8:31 am

    The definition of custom building.

  4. 4 chopmonster66 Jul 20th, 2015 at 8:42 am

    Sweet ! very nice work .

  5. 5 Boston Jim Jul 20th, 2015 at 8:54 am

    Hey Jeremy, just as nice as the other 6, Congrats ! BJ
    PS, been driving up & down 81, gonna stop by someday !

  6. 6 richards Jul 20th, 2015 at 9:56 am

    YES!!! Absolutely beautiful. Notice the way the exhaust follows the frame. For some reason that really caught my eye…

  7. 7 Stony Crane Jul 20th, 2015 at 10:06 am

    very cool and truly a labor of love, congrats

  8. 8 BCinSoCal Jul 20th, 2015 at 10:21 am

    I love this bike! Definitely thinking out of the box, and doing it beautifully. Amazing piece! Can’t say enough about it!. Well done Jeremy!

  9. 9 domino Jul 20th, 2015 at 11:03 am


  10. 10 Jul 20th, 2015 at 11:26 am

    Well done & inspiring as usual from LC!

  11. 11 Woody's Jul 20th, 2015 at 11:46 am

    love it, love it, love it!

  12. 12 Ed Youngblood Jul 20th, 2015 at 1:01 pm

    What a cool engine!

  13. 13 James just another Crazy Kiwi Jul 20th, 2015 at 1:46 pm

    Different and Amazing with great engineering, Modifications like these take allot of work.

    Burt Munro put a Lycoming Head off a Catalina on a Velocette. Using very rudimentary tools
    as you would expect lol

    Those sorts of mods can be very difficult and often take huge amounts of time.

  14. 14 Jul 20th, 2015 at 1:50 pm

    Strong work — wow, there’s a lot to take in. . . Thanks for sharing!

  15. 15 Jul 20th, 2015 at 3:22 pm

    Jeremy is one of the few guys who really does things differently, im always blown away by the bikes he builds and the ingenuity involved. Another bike with the right amount of machine and hand made parts. Congrats on a killer bike

  16. 16 Nathan Jul 20th, 2015 at 3:43 pm

    Love it. Have always liked the stance of speedway racers and intended on building a bike along those lines.

  17. 17 SIGFREED Jul 20th, 2015 at 4:22 pm

    I tried ice speedway once… ONCE only that is, before I rapidly retired, soaked, frozen and scared sh#tless.

    This is by far LC’s best effort to date – truly amazing effort throughout. Keep it up!

    Hope it will at be ridden hard; if not in anger.

  18. 18 Jack deagazio Jul 20th, 2015 at 5:22 pm

    Another great build from jeremy

  19. 19 Jul 20th, 2015 at 6:17 pm

    Such nice work, great to see some builders still taking things to this level ! congrats on the build!

  20. 20 Dave Blevins Jul 20th, 2015 at 6:30 pm

    Very cool indeed! Good to see craftsmen are still out there doing neat stuff.

  21. 21 Iron Horse Jul 20th, 2015 at 7:01 pm

    That bike is Off the Hook!

    Everything from the custom fabbed front end to the even more custom made engine is just a work of art.

    I remember drooling over Jeremy’s Old Black at the Easy Rider show in Columbus a number of years ago. What an encore with this piece.

  22. 22 Zenaldo Jul 20th, 2015 at 9:16 pm

    A very nice piece throughout..

  23. 23 Steve Berg Jul 21st, 2015 at 7:38 am

    Awesomely beautiful piece!

  24. 24 Jul 21st, 2015 at 7:43 am

    Another great bike from Jeremy. Not only does he build great bikes but he is one of the nicest guys around. Hope to see you in Sturgis my friend!!

  25. 25 Jul 21st, 2015 at 7:43 am

    You’re Aces Mr. Cupp!!!
    You’ll all see two of Jeremy’s Hydro Springers at Michael Lichter’s “Naked Truth” exhibit at the Buffalo Chip during the Sturgis Rally. Jeremy built us a front end for our Hot Bike Tour build last year and it will be in Michael’s show in a couple of weeks as well!
    See you in Sturgis Jeremy!

    Big Joe

  26. 26 Jul 21st, 2015 at 10:38 am

    One of the most talented builders in the industry. Just keeps raising the bar to new levels.

  27. 27 Jul 21st, 2015 at 4:59 pm

    What a great and good looking build. That bike just looks plain fun to ride!! 🙂

  28. 28 nicker Jul 21st, 2015 at 10:35 pm

    “… honor individuality should be the motto of all custom builders…”

    And also the motto of any “Real Biker”…..

    So one has to ask, what’s the main street of Stugis all about these days……???


  29. 29 Mot Jul 22nd, 2015 at 7:54 am


  30. 30 Dale Jul 24th, 2015 at 7:11 am

    This thing is a work of rolling art and study in engineering. GREAT BIKE.

  31. 31 john reed Jul 24th, 2015 at 4:05 pm

    This is a really well designed and built bike

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