Topic: Triple over head cam

[Matt Hubbell]

Not sure if you guys are famiiar with this company or not, but I like the ideas here.The engine is a triple over head cam 4. Check out the testing page for a nice vid.

www.motoczysz.com

[SteveD CB500F]

This link takes you directly to the specs:

http://www.motoczysz.com/main.php?area=07C1

Z-line four?
Twin crank?
Triple OHC?

[Matt Hubbell]

What do you think Steve, kinda cool right. I heard they will be racing in Motogp.

[SteveD CB500F]

The question is, WTF is a triple OHC and a Z-four with twin crank??

[Matt Hubbell]

It is a new design, the engine has counter rotating parts, I guess it is a very smooth engine. It fits into the bike the long way from front to back.

[csendker]

"...4-cylinder engine with staggered cylinder blocks and stacked counter-rotating cranks positioned lengthwise..."

"...twin crank, quad-cam, narrw-angle V-four, dry-sump..." (15-degree V)

"...twin stacked, but staggered counter-roataing cranks joined together by gears..."

I'm starting to develop the picture in my head, but the articles refer to it as a quad cam, not a triple.  The prototype was made by sawing two motors in half, junking the unwanted halves, flipping & realigning the remainders and connecting them back together.  I don't believe that was actually functional, but more a living model.  They claim that by putting the crank(s) in line with the frame, it takes the inertia developed within the motor out of conflict with the inertia developed by the wheels, thus improving the handling.  The test run confirmed the smootness & handling, but indicated it seemed a lot of metal was being moved inside the engine whenever you gave it some trottle.  Gotta be a reasonable power drain with the gears and all connected the cranks, I'd think.  Very neat concept.

[Matt Hubbell]

Yeah the first one was a 4 cam, but the new one is a triple, they have pics on the web site. I have hear that the new one is so smooth it was compared to a Lexus. Hahaha

[Pinhead]

4.5hp per cc...

[aptech77]

Where can I buy one?

[gpjerry]

Here is what is says about the triple cam.

"The newest unique feature of the Z-Line 4 engine is the routing of the intakes, which are positioned between the cams. This is made possible by a triple overhead cam arrangement, with a single full intake cam running down the center of the head, and two partial exhaust cams, one on each side. Looking at the top of the engine, one can see straight down the intake to the top of the piston."

Does look cool.

[Lumbee]

...the bike was in Cycle World a few months back...I'd have to check, but I think the starting price of the bike is projected to be about 50K!  Something tells me we won't see many out on the street...   

[crazypj]

The twin cranks are not a particularly 'new' design, take a look at 1930's aircraft engines.
It may be new to bikes but its just a rehash.
Just like Fuelings w-3, first plane to cross english channel (1908 or 9) used same engine configuration (with sidevalves)
PJ

[superchode]

it'd be nice to see them compete in motogp... but it's a long shot.

[SteveD CB500F]

I wonder if they've heard that the MotoGP rules for 2007 limit bikes to 800cc ??

So that's an 800cc V-Four from Honda then (just lop off one cylinder from the current V5)

They could call it a VFR800...