Ferrari engined motorcycle

David Morton

Lifetime Supporter
ejpotter1.jpg
A similar motorsickle using a car engine. He came to Santa Pod - from Michigan. E.J.Potter was his name. He rode my Bonne and made it do things I could only dream of.
 
This engine is sideways in its car of origin. Funny...it's STILL sideways...

Yes, and there's something funky about that picture. I used to have a 308 and I'm very familiar with the engine geometry. If that motor is transverse, as it appears, the block is sticking wayyyy out beyond the other side of the bike. Unless the bike is actually a "trike", that would make for a difficult balancing act. Plus, there is no shadow under the bike that would indicate that the engine projects out on the other side. Perhaps the guy cut up the block and is only using the first two cylinders with a custom crank and cam. Any other pics?
 
Darryl,

Don't forget that much of what's sticking out on the other side in the automobile application is actually the gearbox, right? (That's an educated question, NOT a statement). The motor alone is quite narrow, and if you do away with the Ferrari gearbox, and rig up some other sort of drive system, then this looks much more plausible.

Is that right, or am I all wet on this one?
 
Might want to put a few rubber bands around your left pant leg - catching your denims in that timing gear could ruin your day....
 

David Morton

Lifetime Supporter
If you look at the picture of Potter, hid left knee is operating and simple clutch and there was no gearbox as sutch. I heard it described as a dog clutch - in reality there was no clutch 'per se' - just on or off and thats how he drove it using the stand around the back wheel on the start line (staging?) to engage drive, build up the rpm then rock it forward so it came off the stand and then kiss your arse good bye.
 

Randy V

Moderator-Admin
Staff member
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If you look at the picture of Potter, hid left knee is operating and simple clutch and there was no gearbox as sutch. I heard it described as a dog clutch - in reality there was no clutch 'per se' - just on or off and thats how he drove it using the stand around the back wheel on the start line (staging?) to engage drive, build up the rpm then rock it forward so it came off the stand and then kiss your arse good bye.

Image did not seem to work on your original post - trying again for you here:

I've been at the drag strip and watched EJ Potter on a couple of occasions (many years ago of course) - He was indeed a Madman.... Watching him kick that motorcycle off it's center stand and the tire smoke would curl all the way up his back for nearly the length of the strip..
Correct in that there was no clutch but simply an IN-and-OUT gearbox (at least in the one I examined)...
 

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Brian Kissel

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Yes Dave, EJ was a hell of a racer. He lived accross the road from a friend of mine, about thirty miles from me. He was at our local dragstrip ( about 8 miles from my house) alot testing. All I can say, is the man has balls!! There is a very good book out about him " The Michigan Madman". Well worth the read.

Sorry for the thread drift Simon.

Regards Brian
 
The EJ Potter bike is the only car engined motorcycle I have seen which doesn't look downright ugly and seem completely pointless.
 

Kelly

Lifetime Supporter
When I was a kid there was a guy that drag raced a big v4 (or maybe it was v6?) 2-stroke Merc outboard engine on a motorcycle. -Ran 9s. It was an accomplishment for a low dollar effort around 1970. He claimed all he did was mill the heads and shave the piston skirt to alter the intake port timing/duration to get there. Sort of a poor boys way to increase duration on a 2-stroker.

I always had piston port twin Yamahas and H1 & H2 Kaw triples. Sounded great for those of us that like multicylinder 2-strokes with chambers. -Cackled like a banshee.

-Kelly
 
That's not a 308 engine. Although it looks similar (4 cam V8), the configuration of the cam belts and associated bits and pieces is different.
 
He has deleted the standard belt tensioners and has changed the belt layout to a single belt. Underneath all that it looks like 308 head and block castings.
 
Might be a bit easier to change the timing belt.
There is a company here in the U.S. that manufactures V8 cycles and trikes, I have personally seen one locally that has a Chevy 502 mounted in the frame...in my opinion a real P.O.S., but as they say there is an ass for every seat.
Here is a link to the U.S. Manufacturer Boss Hoss Cycles : Products

Cheers
Phil
 
He has deleted the standard belt tensioners and has changed the belt layout to a single belt. Underneath all that it looks like 308 head and block castings.

Doesn't look like that to me, and I've personally worked on a lot of 308 engines, including the two in my garage.
 
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