Motorcycle Forums banner
1 - 20 of 30 Posts

·
Registered
Joined
·
12 Posts
great, great writing.

You guys have exceeded my expectations for a 12 bux a year subscription.

It's a rainy day here in Tel Aviv, so if I can't go flicking my bike, at least I can enjoy reading about bikes.
 

·
Registered
Joined
·
40 Posts
My MO page says I'm gonna expire in 6 days!! Holy Sh**! I'm too young! Mommy!



Oh, wait.... I think it says my subscription is going to expire in 6 days. Uh. Thats better. Never mind.





 

·
Registered
Joined
·
5,030 Posts
Great article. My favorite is the "Old Wing". I've always dreamed about building a custom bike with cheap parts from eBay, swapmeets, junkyards, etc. Hell, with the way guys toss factory H-D parts for custom bits, you should be able to buy everything but the frame and block.



My only beef with the article is this line about the Segway - "a potential historical moment in transportation, or merely a footnote, that's yet to be seen."



Uh, no. You forgot option #3 - "The first major con-job of the 21st century." Dean Kamen is PT Barnum and he's finding plenty of suckers.



The Segway - for those who seek the versatility of a Huffy for the price of a Vespa.

 

·
Registered
Joined
·
155 Posts
Massive Head Work a/k/a Giving Head

As someone with one foot firmly in the two-wheel camp and the other happily grounded in the old-school four-wheel world, I would really like to know how heads from an overhead-cam Porsche 911 were mated with a pushrod Porsche 912 (***** 356) block, never mind fitting it into a BMW two-cylinder (versus four-cylinder Porsche motor) chassis. Either someone did some very canny valve work, or else someone has waaaaaaay too much access to a whole lot of machine tools without a steady guiding hand - or thought.

Solexes suck anyway. Viva le Maestro!
 

·
Registered
Joined
·
1,521 Posts
My favorite odd-bike was not presented so I have to dismiss all these as worthless flukes.



The weirdo bike of my liking is 3-cyl 2-stroke 500cc H-1 Kawi that someone added two more cylinders. The sight of in-line 5-cyl, with a manly 5-to-5 chromed exhaust, this kicked at least my butt.



- cruiz-euro
 

·
Registered
Joined
·
1,459 Posts
Re: Massive Head Work a/k/a Giving Head

>>I would really like to know how heads from an overhead-cam Porsche 911 were mated with a pushrod Porsche 912 <<

I was thinking exactly the same thing -- not to mention that the 911 is a flat 6 while the 912 is a 4, and I would guess that the cylinder bore and spacing are probably different!
 

·
Registered
Joined
·
12 Posts
Re: Massive Head Work a/k/a Giving Head

Correct me if I'm wrong, but: (1) 911 heads are cross-flow, right? (2) those heads in the picture aren't. If there's any 911 in those heads, it's only the metal they melted down to make them.
 

·
Registered
Joined
·
129 Posts
At my old job, there was a half-built bike that sat in the corner for about 6 months. It was like the few other choppers that I'd seen as projects, except this one had an extra cylinder (a v-tripletish thing).

I guess somebody figured out that it wouldn't work, and there was a v twin in it one day. The twin looked exactly like the triplet, so I almost want to think that they removed the third cylinder, but I don't know.

I told the new guy about it months later, and he didn't believe me, even when I had everyone on the shift vouch for me. Has anybody seen one of these? I'd love to find a picture online and shove it in his face.
 

·
MODERATOR X
Joined
·
5,449 Posts
Re: 911 heads on a 912 motor?

Hmmm, look like 912 heads to me...
 

·
MODERATOR X
Joined
·
5,449 Posts
Re: Head job

Not to mention, an overhead cam, and six cylinders. When I see something like this, I have to wonder how correct the rest of the story is.

Reminds me of the time me and a buddy took this old Willis-Knight sleeve-valve motor, and filled up one of the ports with JB weld. This optimized the compression ratio, and brought the brake effective mean ration pressure (on the Borgward scale) up from 2850 to over 3000! Yikes! We had to retard the throttle dashpot at full chat, down to something like 2700. That's ok, when running a Bernie Bergmann wet-dry timer (Ruxel @1.10 x .002646).
 

·
Registered
Joined
·
1,459 Posts
This was a W-3, am I right -- one cyl at 45 degrees and another at 90 from the first -- like a standard Harley with another cyl spaced an another 45 degrees? If so, it was built by a guy named Feuling (sp?) who died recently. It was featured in at least one of the US moto rags a couple of years back (either CycleWorld or Motorcyclist).



Apparently it actually worked fairly well.
 

·
MODERATOR X
Joined
·
5,449 Posts
Re: Freakin Bike Fringe!

Actually, this design culminated in the "Vauxhall-Diablo" design, of the late teens.

It used a panhard rod/split-tooth knuckle arrangement, that aligned the centre cylinder(s) with the crank-pin, and the pre-requisite babit coated (oblong) caster/shoe assembly.

Some of these were "monosoupape" in design, and frequently caught fire. A simple modificaiton fixed the problem, but by that time, the design had become obsolete, and was dropped in favour of the Sussmann principal.
 
1 - 20 of 30 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top