The new 4 valve cylinder head for Laverda triples is now available

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MVma

MVma

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The Dutch project of a 4 valves cylinder head for Laverda triples is now available. It is actually a whole project which includes the cylinder head (new foundry for the first time), the Nikasil liners (mounted in the original block) and the special pistons adapted to the 4 valves. Also available are a special crankshaft (capable of 11,000 rpm), ready-to-install electronic injection, a special exhaust and other options.

This project was developed by Gijs van Dijk, whose reputation is well established, especially for the preparation of his racing machines, and by Klaas Collet.

Their new website (several languages) is: https://laverdaworkshop.com

A machine is currently assembled, ready to be tested by customers and press demonstration.

 
April 1 was a few weeks ago?! Sounds amazing. Cant see prices? Or the new brakess and frame strengthening kit need to slow the thing down😄
Not relishing the conversation with insurance brokers at renewal time...
Does all look lovely ..would like to see a pic of the cams in situ though. What do you think...Keith? Wouldnt you want new rods with that amount extra..then theres the clutch, and gearbox..its gonna be never ending, but no doubt thats the fun if your pockets are deep enough. Wonder what would do for value..imagine a fully kitted Jota in an auction next to an untampered original.
 
as I know from Gijs at his other race bikes he used 120 deg so I assume it is 120 but do not know exactly.
There is a foto on facebook, left piston up, two other pistons down- so it must be 120 deg. Otherwise te two outer piston should be innthe same positions.
Andre
 
Piranha Brother 2 said:
Wild, crazy stuff! New cases next, to handle the power? And Gijs can call on Red for the revised output shaft at the gearbox!
Click to expand...

If making new cases perhaps the highest priority would be the elimination of the dreadful sleeve gear style box altogether.

Awesome project by Gijs and co, hats off to them I hope it does well!
 
I love the idea, being able to produce any head is fantastic as supply is limited for replacements. But my experience of 4 valve motors is the improvement is topend mostly and the ability to flow at high revs. That would limit my ability to use it in my Police infested state, but who cares about boring shit like that. Faster Laverdas are a great idea.
 
"But my experience of 4 valve motors is the improvement is topend mostly and the ability to flow at high revs."
And the lighter valves to allow high revs. A lot of racers hated the 4 valve Suzukis and stuck with the two valvers for quite a few years.
An interesting lot of work Gijs has done.
 
Piranha Brother 2 said:
Wild, crazy stuff! New cases next, to handle the power? And Gijs can call on Red for the revised output shaft at the gearbox!
Click to expand...

Gijs already had his own solution for that on his endurance racer. Seems to be one of the issues you encounter when you have to deal with that performance.

Never had such issues..  ;)

Marnix
 
MarnixSFC said:
Gijs already had his own solution for that on his endurance racer. Seems to be one of the issues you encounter when you have to deal with that performance.

Never had such issues..  ;)

Marnix
Click to expand...

Peter Williams and Norton had that problem with 60 horse power.

Paul
 
Although I had heard of the 4 valve project, I was skeptical it would ever be done as it is a huge amount of work. Congratulations are in order!

Now I would be wary of fitting such a kit as I am not sure the rest of the engine can handle reliably such an increase in power. Let alone the frame flexing and being able to stop.

If we assume the 35% power increase and are using the special 11,000 RPM crankshaft, the first thing that's probably gonna fail is the primary chain.

Any guesstimate as to the cost of the whole kit?
 
I agree, that when you raise the bar one place, you expose the next weak point in the chain, to be solved adn so on.
There are after all, good measures to be done about many of the points. Firstof all, I see Gijs kt as exactly that: a kit. The kit does not consist of one thing alone, like 4 valve head, or presureised extra lubrication of cams, or.. But a series of parts to make up the kit: cylinderhead, extra lubrication, cams, injection setup, pistons, conrods, cranck.

Parts like forks, brakes and other parts, are already there to be exploited.
I saw one of his rear monoshocked RGS bikes also installed with Laverda upsidedown forks and 17" wheels and big brakes, many years ago outside his shop. A nice bike.

So, personally I like my Laverda to at least look mostly original. For me, it's the way of preserving the looks of a classic bike. Nut all these bits can be implementated in a wasy so that it's not screaming. At least not until you start the bike ;)
Kudos to him for doing this.

I am sure that taking for example a normal SFC1000 and giving it at least 135Hp is really noticable, also when accelerating from 100 km/h onwards on a motorway ;) By that I don't mean noticable only to the rider, but certainly also to other road users, incl. much more modern bikes, who expect the Laverda to be easy prey at all times.

Great work.
Kind regards,
jacques
 
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