Feasibility question

[Joeker80]

Anyone have an idea about the feasibility of putting 1200 heads on a 750 block? Don’t crucify me; just thinking out loud. It would make a big bore short stroke (nearly 1000cc) engine. Why sacrifice torque?? Let’s just say I’m looking for max HP out of a 1000cc bike.

[Kev m]

Heads?

Sounds like you mean cylinders and pistons (and heads).

AFAIK there isn't enough room on the block of the smallblock itself to go any further in capacity (edit-then it has gone with the 850), even if the parts were produced to be otherwise compatible.

But I would assume there is no commonality between all or most smallblock and big block parts, starting with the blocks and cranks themselves.

So basically no.

[Joeker80]

Of course that’s what I mean Kev M. Thanks for the input. I haven’t looked too far into yet, just wanted to get some thoughts and discussion going.

[Joeker80]

Well SoCV, if it’s doable, I’d be willing to spend the money.

[Kev m]

Well SoCV, if it’s doable, I’d be willing to spend the money.

What we're trying to say is that in theory one can do almost anything if the budget is unlimited. You could probably figure out a way to put Ducati pistons on it if you tried hard enough.

But there's no bolt on solution, it would probably require a custom crankshaft and possibly a custom block and who knows what else.

If you somehow managed to get it all in something that reassembled the current block and chassis you would likely tear up the rest of the drivetrain from clutch to shaft to rear.

You might have better luck finding a Bellagio and attempting to make it as close to a smallblock replica as you can with bodywork and possibly chassis modifications.

[Perazzimx14]

The answer to the question is "YES"!

The 10,000 follow up questions are probably not so black and white.

[dguzzi]

  How about a Griso engine in a California frame? 

[Kev m]

Then you have the problems of cylinder/head studs not lining up , pushrod tunnels being in different locations , will the pushrods find the cam followers, etc etc .

Nah the "custom" block and crank solved all that ... 

[Antietam Classic Cycle]

  How about a Griso engine in a California frame?

What era California - Loop, Tonti or (whatever one calls the) 1400?

[Chuck in Indiana]

Look, I've built some stuff over the years.
No. It's not feasible unless you have unlimited funds and machining capability.. and then what would be the point?  I really don't mean to offend you, but by asking the question..
Oh, never mind.. 

[nc43bsa]

Anything's possible.

In the 90's I saw a Ducati with two Honda single-cylinder heads;  they had been converted from chain driven cams to belt driven cams.  IIRC, the Ducati cylinders were used.

Hundreds of hours of welding and machining.

[Testarossa]

In the 90's I saw a Ducati with two Honda single-cylinder heads;  they had been converted from chain driven cams to belt driven cams.  IIRC, the Ducati cylinders were used.

So the next question is, was the result a faster bike?

We marvel at frankenstein engines presented as virtuoso machining. Some rise to the level of art (Millyard for instance). Few constitute practical improvements.

[Frenchfrog]

Go for it ! It would make very a  interesting and long thread reading about all the difficulties encountered and how they are overcome.

[Murray]

The 940 bellagio was essentially a short stroke two valve 1200 motor with the police spec 850 crank. There is some issue with the four valves and getting them to breath.

[tazio]

No idea if something like this has been attempted before.
Go for it if so driven. I'd imagine whether complete job ever sees full light of day or not, the ancillary knowledge gained as one conquers the first step, then the next, and the next.. would be valuable.
Wish I had your energy!!

[Kev m]

Anyone been to Barber's and see the bikes that some machinist in I think the UK built? He took two motors from various JAPanInc. brands, cut them up and joined them at the ends so to make a 3-cyl 2-stroke into a 5-cyl and stuff like that?



And two EDIT V-6's L-6's to make a V-12:

[Antietam Classic Cycle]

Anyone been to Barber's and see the bikes that some machinist in I think the UK built? He took two motors from various JAPanInc. brands, cut them up and joined them at the ends so to make a 3-cyl 2-stroke into a 5-cyl and stuff like that?



And two V-6's to make a V-12:

I've not been to Barber, but do subscribe to Allen Millyard's Youtube channel:
https://www.youtube.com/channel/UCj4hbNBjmdvXONmcxcLSNhg

The Kawasaki was built from two inline six cylinders.

[Kev m]

I've not been to Barber, but do subscribe to Allen Millyard's Youtube channel:
https://www.youtube.com/channel/UCj4hbNBjmdvXONmcxcLSNhg

The Kawasaki was built from two inline six cylinders.

Thanks for the correction.

Aw hell, THAT'S EVEN BETTER!

[guzzisteve]

Anything's possible.

In the 90's I saw a Ducati with two Honda single-cylinder heads;  they had been converted from chain driven cams to belt driven cams.  IIRC, the Ducati cylinders were used.

Hundreds of hours of welding and machining.

I have pics of that 'Duconda'  Had a duck smoking a cigar on the bodywork. My days going to Road America in WI. Cool stuff.
This tread goes to show people actually believe their advertising that the V7 range is a descendant of the original, all bull.

[Murray]

  How about a Griso engine in a California frame?

How many 5 speed gearboxes do you have? Hint it won't be enough.

[Mayor_of_BBQ]

I've not been to Barber, but do subscribe to Allen Millyard's Youtube channel:
https://www.youtube.com/channel/UCj4hbNBjmdvXONmcxcLSNhg

The Kawasaki was built from two inline six cylinders.

Dead right Charlie, probably my favorite YouTube 'creator'...  Allen actually CREATES things!  Love 'The Flying Millyard' and the insane motorcycle with a Viper V10!