Turn your head

[ir_joep]

Hi,

What would it take to turn the head on the back cilinder of a 750 sport, like on the early Pantah engines?
I could see some possiblilties with the ready available F1 exhaust sytems. (www.oldracingspareparts.com)

And I think it will look good too

Thanks Joep

[ducinthebay]

What it would take is a head from a Pantah series motor. The bottom ends are the same I think. For a full detail of this conversion search through:
loudbike.blogs.com
He took and put an F1 top end on a later bottom end, or some such thing. (I read it 2 years ago or more, so I can't remember the details)
Are pantah heads same front and back? Except for the finning.

[ir_joep]

Thanks for the reply. I will certainly have a look at that website.

I was hoping that some machining of the head and a different cam would do the trick
* Machining of the ports (in and out) to accept a carburator at the now exhaust side and machining to accept a exhaust at the now inlet side. Is this possible, given the port diameters and such? Is there enough material to machine?
* Machining of the valves?
* Get a new cam

Saw a Cagiva Allazurra 650 the other day with the vertical head F1 style. That looks a perfect fit.

I'm going to take a look at the tech specs and report later.....

Cheers Joep

[jcslocum]

just thinking about the way you have explained what you want to do made my head hurt!

You can use a cam from the horizontal cylinder in the vertical head but the valve sizes will be all wrong. Exhaust flanges and intake flanges will aslo be wrong. Find a Pantah head!

[ducinthebay]

OR, just put a front head on the rear cylinder. The finning is funny, but its a lot easier. Are the oil lines a match? Cam belt alignment is something you will need to check.
I got a spare 750 head I'll sell you.
Pantah head still seems to be the fastest / easiest way.
Then you have a challenge of where the carb lives behind that cylinder. Is there a frame in the way there? F1 frame is very different in that area.

It is certainly a project, but still have to ask why? I'm not seeing any performance benefit, and the style points are adding up for me.
A 17" wheel conversion, or a front end conversion would be money/time better spent, but that's my opinion.

Cheers,

[jcslocum]

I don't think the oil channels line up properly.

[higgy]

I would not let the oil passages be an issue,external oil lines are easy to do............
as for the rest of the issues My first thought is why? seems like a silly idea to me,but then its not something I have given a lot of thought to
I have enough issues sorting out the normal stuff

[ir_joep]

Hi,

The reson why I'm asking is that I have got a spare 750 Sport engine and dreaming of a TT2 replica.
Can I use the sport engine or should I go for an other model?

Cheers Joep

[ducinthebay]

I don't know for sure, but I think the Sport bottom end is a bit more durable than the Pantah motor. Other than that, the two motors are basically the same, except for the rear head. Both are 5 spd, with the same clutch setup. Get a Pantah head and call it good. If you have Dellortos, then they will work on both motors. The intake manifold is a little bit different give you the right angle, but I can't tell you what the difference would be exactly.
Sounds like a fun project.

Cheers,

[ducbertus]

this won't work
turning your're vertical head requires major machining as on the opposite is nothing prepared to adapt the belt.
If you are into this, why don't you go a step further in the past and make a bevelhead.
that would be something

ducbertus

[jcslocum]

Hi,

The reson why I'm asking is that I have got a spare 750 Sport engine and dreaming of a TT2 replica.
Can I use the sport engine or should I go for an other model?

Cheers Joep

There are TT2 frames kits out there that use the modern engine and swingarms from a monster. Thersby has a really nice kit for about 3500 GBP.

[ir_joep]

this won't work
turning your're vertical head requires major machining as on the opposite is nothing prepared to adapt the belt.
If you are into this, why don't you go a step further in the past and make a bevelhead.
that would be something

ducbertus

Please do not take turning the head literally. I just ment switching the exhaust and inlet ports of a 750 sport engine like on the early pantah's.

Cheers Joep

[ir_joep]

http://cgi.ebay.co.uk/Ducati-750-F1-R-F ... 4a9d621af2

Thersby looks great!!!

Having a look at the pics at e-bay I see another reason to switch to an early style pantah setup. The TT/F1 tank is very different if the inlets are between the cilinders --> no space for tank bottom between the cilinders. The tank just looks to have a flat bottom.

Thersby says a 900 can be fitted as well...

Cheers Joep

[persempre907]

Nice project, but there's a little inaccuracy in the description.
He says that Italian riders are very small persons. He doesn't know me...
Ciao

P.S. I think the same frames were built nowaday by Verlicchi too.

[ducinthebay]

OK, here's a head for your project.
He also has a set of Vee Two cams for sale.
http://cgi.ebay.com/ebaymotors/DUCATI-5 ... 35a7a09400

I don't know how much different the 500 motor was from the 750, but this is you best shot, except an F1 head, which will be much harder to find. Check the bolt pattern. Everything else you can alter to fit.

Cheers,