Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > Class A

[mbracing748]

I hope to run in the DD series next year, as I have a national license I need to run in the Class A 618cc.

Looking at the regulations it mentions that everything about what you need to keep. My question is – because the 750ss uses the same bottom end can I change the Heads, Barrels and pistons for the 618cc, or do I need to run the 600 cases?

I’m currently building a Race 888 so I’m trying to keep the cost down for the first year. So I'm looking at different ways of obtaining a bike as there does not appear to be many Class A bikes for sale or even rent.

What I should have asked is:- Can I use a 750ss / monster Bike and downgrade to a 618cc. Looking at the regs everything can be upgrade to a 750ss spec apart from the engine CC.

[Ghost]

You can use your 750 cases just be mindful of the oil ferrule between the cases and barrels as on my 750 cases the holes are larger than the 618.

[bally71]

I think the stroke is different

[mbracing748]

same stroke 61.5mm

620 - 80mm bore
750 - 88mm bore

750 Valves are the same size.

[mat2hew]

would it actually be cheaper to replace the heads & barrels? a used engine ain't that much.

[dunlop0_1]

James Gerrard has a cracking A bike for sale.

https://www.facebook.com/photo.php?f...13 917&type=1

[skidlids]

Hi Mike

No real problem with you using a 750 bottom end providing 620 Heads, barrels and Pistons are used, But as mentioned by Phil oil-ways etc can differ,

There are 3 varieties of 750 Cases that I know of, the old carb'd cases the first of the 750s with the clutch slave on the left and the later ones which do away with a O-ring between the cases and the barrels

I still have my spare 620 for sale at £2200
http://www.ducatisportingclub.com/sh...d.php?t=176410

The one James is advertising is another good bike I know as it's one I sold last year

[mbracing748]

Cheers guys, food for thought.

Kev, still interested but i really want a 6 speed not 5 due to my riding style.

[skidlids]

Originally Posted by mbracing748

Cheers guys, food for thought.

Kev, still interested but i really want a 6 speed not 5 due to my riding style.

So Mike you will also be after a 6-speed gearbox to go in a set of 750 Cases, along with the barrels, pistons and complete heads its not going to be a cheap build

[mbracing748]

Yes it may well cost me an arm and leg :-). But I do have a complete engine internals from a few bikes....

I have email James via Facebook to see if it's still for sale.

KEV - YOUR mail box is full.....