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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: 757,805
Added: 5 years
Runtime: 2:27
Comments: 435

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Comments:

Author Airsoftfrreak96 (4 days)
I give this engine and all the work behind it a 10 out of 10
More than deserved.hope you sell the plans soon 

Author AJ Moore (4 months)
Must put this in my grandma's motorized wheelchair...

Author Jeremiah Hinton (3 months)
I would buy this and put it in a hardknock frame

Author Arief Triwahyudi (22 hours)
i want try to build one can you make plans with sketchup i will buy the
detail

Author Jimmy Cooper (10 days)
This would be awesome in a little kids mini chopper lol

Author captainbluefishmonster (2 months)
That probly equivalates to 10 or so + kicks to cold start so yea spot on ..
Minus all the swears 😡
NICE JOB

Author Michael Weir (2 months)
who makes these engines and can you still get one

Author Tiguy Uphill (29 days)
Love to twist some Chrome-Moly around that!

Author Brian Weihe (3 months)
could i put one of those on a mini motorcycle

Author Ducati Drew (6 months)
Tattoo, needed that on Fantasy Island 35 years ago. Older guys will get it.

Author SoyBoySigh (1 month)
I'd bet a 50cc or 70cc Honda single cylinder would kick it's ass - so yeah
spot on good replica! Ha-ha. Now how about a proper L-twin motor, in the
form of a Ducati Bevel Desmo 900 SS "square-case" - now that's one you
could even SELL it's popular enough - yet at the same time it would also
make some power! Somehow I get the feeling the people who would want a
running panhead motor on their desk-top ... I'm picturing the oil baron guy
from The Simpsons - they'd probably be even happier with a FULL-size
panhead paperweight, chugging away with that distinctly AGRICULTURAL
sound.....

Author Ralph McCrum (4 months)
YES !!!! Now Here It Are !!!!!

Author Fender Veal (4 months)
And I thought I had seen it all. Great job,well crafted been building the
real harley motors since 1970 ,now I want to build one for grins,too groovy

Author Paul Eaton (28 days)
smoking just like a harley to. lol

Author Brent Miller (1 month)
You can use it as a vibrating bak massager LOL Make a opposed twin and it
will run as smooth as silk

Author Todd Dooley (26 days)
Cool as hell! Great job!

Author jason smith (24 days)
I want one does anybody know I can get one

Author Huffy Davidson (5 months)
Outstanding! Can it be mounted on a bicycle?

Author harleywainie (4 months)
That's awesome mate, well done 

Author Jeremy Bryan (1 month)
Probably more reliable than the original! 

Author denro0 (8 months)
I'd mount some ape hangers on the front of that board and have it working
with a throttle grip....that motor is awesome !

Author David Good (7 months)
Now for the hardtail chassis, 2/5th scale

Author tobylump (6 months)


Author Allen Scott (7 months)
i would like to put one on my mini harley bike swap it out from the stock
49cc with this and it would be a crowd pleaser for sure what is the cost of
one of these little engines run???

Author bob smiths (1 year)
What is the displacement and HP of this motor? 

Author MrFrontenginedragste (6 months)
Smokes like a panhead!

Author jovan jovic (5 months)
How did you do

Author Alexey Fin (5 months)
Awsome!

Author HoonTV (1 year)
Awesome!

Author Jurnymn (7 months)
Smokes like my old Panhead.

Author Soldier53flyer (5 months)
Great work.

Author jovan jovic (5 months)
How much 

Author James Scarberry (9 months)
Tooo Cool............... Nice job!!

Author Bid ways (2 months)
To know it

Author Da Nri (5 months)
Do you sell these? Or would you sell this one? I love it. 

Author bud burck (6 months)
How much for one

Author NZHorizones (7 months)
That sounds amazing!

Author BUDDY LIGHT (6 months)
Looks like it may require a cooling fan?

Author dizbcuz (8 months)
your rear pushrod tube is wiggling but great job

Author Zvonko Mokricky (1 year)
the best engine.

Author C moore (5 months)
Fantastic!!!

Author wildcoyote34 (1 year)
this is pretty cool ,,, it even sounds like a real harley engine 

Author daan bombay (11 months)
whaaaaaaaaaaat XD Nise man

Author Jesse Angell (11 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 Julyboy 1950 (6 months)
tooooooo much!!!!!!!!!

Author Mesa Vella (11 months)
I am amazed...excellent feat!

Author awbretire (1 year)
Awesome. Nice job of engineering. And can ya make a 4 speed tranny for it
with kick?

Author Dan Brown (1 year)
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
bet.

Author pandaManda22 (1 year)
What kind of carb are you using?

Author Mike Sellers (1 year)
even at 2/5 scale that engine sounds bad ass

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