Harley-Davidson Scale Model Running Panhead Engine

His name is Ron Colonna. This engine was scratch built to a scale of 2/5ths or 40% of full size. The bottom end was taken from a drawing of a Knuckelhead engine that he purchased on e-Bay. The top end was patterned after photos taken from e-bay of Harley parts for sale. He also bought a Harley repair manual that helped with the oil system. The crankcase was split into three sections instead of the usual two for ease of machining. The ignition is solid state and I use a GM coil which fires the two plugs simultaneously. Timing is advanced and retarded with the timer body. Two rotating magnets fire a Hall effect device at the proper times as per full sized points. No casting used. Ignition: Spark. Bore: 1 5/16 in. Stroke: 1 1/2 in.The engine is large enough to produce that lovely V-twin sound.

22 Responses to “Harley-Davidson Scale Model Running Panhead Engine”

  1. 1 Wiz Jan 26th, 2011 at 9:18 am

    Way COOL! Gimme one ‘an I’ll build a whole mini-chopper out of it! Even smokes like my old ’48 Pan! Wiz

  2. 2 Kirk Perry Jan 26th, 2011 at 9:22 am

    Put one in a Mustang frame.

  3. 3 Bill Skoros Jan 26th, 2011 at 9:23 am

    Very nice! he needs to build something to put it into now, maybe a scale Morgan!

    A company called Precision Miniatures years ago sold a 1/4 scale working V-twin, along with a 1/4 scale Gypsy Moth.

  4. 4 Neal Jan 26th, 2011 at 10:23 am

    Needs to be more convincing, like to see more oil leaking.

  5. 5 CHOPMONSTER66 Jan 26th, 2011 at 10:27 am

    wow that is great, i want one !! all ready have a mimi chopper frame to put it in.. nice job

  6. 6 burnout Jan 26th, 2011 at 12:51 pm

    I am sooo lazy! peace

  7. 7 J Jan 26th, 2011 at 2:11 pm

    Naw, put it in a FULL sized frame and really freak out the crowd at Daytona this year…..

  8. 8 Manhattan Choppers Jan 26th, 2011 at 2:41 pm

    Does it break down a 1/4 of the time?

  9. 9 zyon Jan 26th, 2011 at 2:57 pm

    I’d replace the motor on my push mower with this and be the coolest guy in town.

  10. 10 Kirk Perry Jan 26th, 2011 at 3:32 pm

    Hey Ron,
    I’m changing my “static” website to a Knuckle & Panhead Build Forum that’s limited to 74 cu. in. displacement.
    Since your Pan fits within those confines, you’re welcome to bring your motor over there and talk about it. Sell it even. There’s an app for that.

  11. 11 Woody Jan 26th, 2011 at 3:42 pm

    tater tot, tater tot, tater tot, tater tot,
    That is way cool, love the sound and it looks perfect. Great job!

  12. 12 Iron Horse Jan 26th, 2011 at 6:32 pm

    WAY TOO COOL!!! One more thing to add to the list of “Gotta Haves”!

  13. 13 Grey Beard Jan 26th, 2011 at 10:00 pm


  14. 14 Dave Blevins Jan 27th, 2011 at 1:42 am

    That’s pretty cool.

  15. 15 EvoJoe Jan 27th, 2011 at 10:54 am

    For your next trick build one full size.

  16. 16 Dr Robert Harms Jan 27th, 2011 at 7:54 pm

    There was a similar “no castings” mini panhead built By Frank Lesnet’s son (sorry I forget his name) about 20 years ago in Lakeland Fl. It also ran and sounded like the real thing. I believe it was also in Easyriders magazine.

  17. 17 Kirk Perry Jan 28th, 2011 at 3:25 pm

    I just started my new “standard size” 74″ Pan motor …… so yeah I know the feeling!
    If you own a standard Pan and run a belt primary, stop riding it until you order a rear sprocket from Rebel Gears • Tennessee. Their ratio puts a Pan motor mildly-turning rpm’s at 45-65 mph. I just tried the rear sprocket out – motoring up and down the street. Comfy. And “Look Ma!!…. No Oil Drips.

  18. 18 jack1340 Jan 31st, 2011 at 12:09 pm

    Fabulous .!! very nice bravo!!!!!

  19. 19 Renegade Chuck Jan 31st, 2011 at 3:10 pm

    Love that…. great work!
    Guess, I could make some wheels 40%when you are ready….

  20. 20 mike corbin Jan 31st, 2011 at 4:41 pm

    How Much ?

  21. 21 Mark Ozimek Jan 31st, 2011 at 6:10 pm

    That’s cool, better gas milage then my beefed up 48 I bet

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