Scale Running Model Harley Panhead Engine by Ron Colonna

V-Twin Panhead
Ignition: Spark
Bore: 1 5/16 in.
Stroke: 1 1/2 in.
Two Cylinder Four Cycle
No Castings Used
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 I puchased on e-bay. The top end was patterned after photos taken from e-bay of Harley parts for sale. I 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. The engine is large enough to produce that lovely V-twin sound.

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Views: 613,399
Added: 4 years
Runtime: 2:27
Comments: 395

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Conley Precision Engines - April 2, 2011


Author Motonit Motors (8 months)
dam cool...

Author HoonTV (3 months)

Author bob smiths (5 months)
What is the displacement and HP of this motor? 

Author Leonard Hoffsteder (2 months)
You should build the rest of the bike, That's Awesome !!

Author wildcoyote34 (3 months)
this is pretty cool ,,, it even sounds like a real harley engine 

Author Ron Fairchild (1 year)

Author Russ Swanson (5 months)

Author Mike Palumbo (4 months)
Here's a mini Panhead. Sounds just like a full scale engine. More links to
others too on YouTube 

Author mastertracker510 (7 months)
Super nice! how much?

Author pandaManda22 (4 months)
What kind of carb are you using?

Author James Hornback (5 months)
Decent Harley action in Red Light King OLD MAN video.

Author Dylan Hunter (6 months)

Author Karl Kreutzer (6 months)
1A +++

Author Всеволод Кононов (5 months)
very cool 

Author Carl DaPonte (6 months)
So damn cool. Where can I buy one to build?

Author Snitchy1989 (4 months)
beast.. How did you make that? and make it look so realistic

Author Mesa Vella (2 months)
I am amazed...excellent feat!

Author Jay Chapman (5 months)
wow crazy

Author vittorio midjo (7 months)
how does engines give sound

Author coltbuntline (5 months)
Where can I buy on? Do you have a knuckle and shovel?

Author Jonathan Bolz (7 months)
Definitely TFC in this small scale and especially to retain that
"Ker-chumph" sound.

Author James Scarberry (23 days)
Tooo Cool............... Nice job!!

Author Mike Clements (6 months)
I have great respect for any one with enough patience to build something
like this. I have the tools and the skill. But I don't have the patience.
It takes all 3 to do the job. Well done sir !

Author daan bombay (2 months)
whaaaaaaaaaaat XD Nise man

Author Augusto Girotto Barioni (6 months)
harley davidson sound

Author Jesse Angell (2 months)
Hey Ron, I'm new to the miniature engine world, and I'm wondering how one
goes about obtaining these. Are they all custom built? Or does anyone sell
prebuilt engines or kits? Thanks in advance.

Author Daisuke Sakazaki (4 months)
Kids and such. First of all you guys need to get off your butts and do it.
Im a psycho with a v-twin chainsaw on my arm. Deal with it. Don't try this
at home. Stereotypes you also need a job.

Author William Karlovic (6 months)
Very cool! but what are you going to do with it?

Author re tard (4 months)
that would go great on my rupp hustler

Author TwistyMcFisty1 (5 months)
You totally have to build a little chop around that.

Author Josh Rogers (7 months)
love how it still has that classic harley off beat at idle

Author Dean Burge (6 months)
Is there one that is 66/80 cc that will mount on a bicycle

Author andreas stavrou (5 months)
popcorn is ready

Author carl burke (5 months)
Sweet !!! is this available to build in a kit ?

Author Dan Brown (4 months)
Very nice job. Casting and machining, you are indeed a master craftsman.
Retired has tools and brains putting it all together and this is what you

Author Donny Yaul (4 months)
i want that to build mini bobber for my lil girl... 

Author awbretire (3 months)
Awesome. Nice job of engineering. And can ya make a 4 speed tranny for it
with kick?

Author Амиран Бохуа (8 months)
Souds deadly Right! 

Author Ray Abbott (10 months)
This is Great :)

Author Mike Sellers (4 months)
even at 2/5 scale that engine sounds bad ass

Author herbienbrian2 (4 months)
Now this would look good in my minibike.

Author Esiggies Cigarettes (3 months)
I hope you have a trailer.

Author Zvonko Mokricky (4 months)
the best engine.

Author 45yayayaya (7 months)
that's the coolest fukin thing ive ever seen

Author KesherMedia Kay Em (7 months)
OMG... It's a baby Harley. :-)

Great work!

Author John Ratko (4 months)
Right on.

Author Brian Critchley (2 months)
Brilliant, put it in a mini Harley frame & charge kids twenty a ride, then
build more, you could end up with millions..

Author Jay Vee (1 year)
Awesome...but why the need for a battery?

Author Cyborg Badger (1 year)
Put in an RC plane!

Author bow13400 (1 year)
Just great , man

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