Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > Class A in the Grave?

[MLC Racing]

Originally Posted by skidlids

I'm sure JPM and Lily are missing for very good reasons, if it wasn't for the Saturday accident there would be 12 in the standings, but that is still 9 to 10 people short of the list I was given at the begining of the season.

I have just missed the only meeting I intend missing this year, I have booked both days at Snetterton using Sunday as a test day to see if the bike is improved.

I'm sure all those not racing again this year have good reasons.

Is it time to look again at rules for next year and try to find a balance between the performance of class A and class B bikes, so they can be run as one class.
Given the results of the dyno and weight figures maybe we're not too far away as it is.

[couchcommando]

Originally Posted by MLC Racing

I'm sure all those not racing again this year have good reasons.

Is it time to look again at rules for next year and try to find a balance between the performance of class A and class B bikes, so they can be run as one class.
Given the results of the dyno and weight figures maybe we're not too far away as it is.

Let the 750 carb'd bikes run against 620 injecteds, a simple upgrade to the 583's already out there

[Ghost]

Originally Posted by couchcommando

Let the 750 carb'd bikes run against 620 injecteds, a simple upgrade to the 583's already out there

Thats a bloody good idea.

[mat2hew]

Arrgg! now I've said it.. I quite Like some faster bikes out there, It's great. I don't know how they feel but its fine by me.

[Fastfasulli]

Originally Posted by Chaz

Or "TP" conversions on the 583's would work just as well :

LOL

750 Carbed sounds a good idea to me....or even a 'TP' conversion (now that really does have a ring to it....maybe a show on Men and Motors....hmmmm) if it get's the bike up to 620 speed.

What other changes will a 583 need if the engine is going faster....brakes, forks...anything else?

[skidlids]

Conversion of a early 583 engine to bigger valve heads isn't that simple as I understand it, If you have a late 1999 to 2001 583 Monster engine then you can fit the 620 heads and domed pistons, To take it to a full 620 you would need the crank as well.
There is a head on Ebay at the moment for £90, so for a pair of heads, barrels and pistons your probably looking at £250 to £300 providing you have the late engine, by the time you look at adding a crankshaft you may as well be buying a 620 engine (earlier ones are 5 speed later ones 6 speed) prices vary depending on age, mileage etc.
If you could run carbs then you would just need some jetting work done to your old 583 carbs.
The alternative to carbs is fuel injection in one form or another, the original setup with Injector bodies, higher pressure fuel pump, coded clocks, ECU, keys and Harness will set you back a fair bit
There is an alternative of going with a non standard non coded ECU such as a FIM module (not cheap) and you still need the harness for the 5.9M type ECU, throttle bodies, pump etc or you could use a 750SSie ECU with a harness from either the 750SSie/900SSie or the M900ie along with a power commander, pump and throttle bodies

Most people are already runing 40mm pipes so no real cost there.

Then again for those wanting to move into class A there are bikes like Trouty's out there for £2k, you can alternatively buy a standard road 620 for less than that.

Going the carbed 750 route may well have tyre implications as well as the age of the engines and spares availability

[Rattler]

Or how about converting the 620s to 583s?

[paynep]

Originally Posted by Rattler

Or how about converting the 620s to 583s?

As I read the rules there's nothing stopping anyone running a carbed 620 in Class A.

Except somehow you have got to make the sparks happen. The flywheels are different so you can't use the 583 pickup setup, and a pair of CDI boxes are almost as expensive as a new ECU.

Unless you use a 750ss ie loom and ECU for the sparks and a set of flat-slides for the fuel...........hmmm

Anyone got a set of 35mm flatsides spare?

[paynep]

Didn't Ducati make a big bore kit for the 600 ??







I'll get my coat

[Imola Duke]

Originally Posted by skidlids

Conversion of a early 583 engine to bigger valve heads isn't that simple as I understand it, If you have a late 1999 to 2001 583 Monster engine then you can fit the 620 heads and domed pistons, To take it to a full 620 you would need the crank as well.
There is a head on Ebay at the moment for £90, so for a pair of heads, barrels and pistons your probably looking at £250 to £300 providing you have the late engine, by the time you look at adding a crankshaft you may as well be buying a 620 engine (earlier ones are 5 speed later ones 6 speed) prices vary depending on age, mileage etc.
If you could run carbs then you would just need some jetting work done to your old 583 carbs.
The alternative to carbs is fuel injection in one form or another, the original setup with Injector bodies, higher pressure fuel pump, coded clocks, ECU, keys and Harness will set you back a fair bit
There is an alternative of going with a non standard non coded ECU such as a FIM module (not cheap) and you still need the harness for the 5.9M type ECU, throttle bodies, pump etc or you could use a 750SSie ECU with a harness from either the 750SSie/900SSie or the M900ie along with a power commander, pump and throttle bodies

Most people are already runing 40mm pipes so no real cost there.

Then again for those wanting to move into class A there are bikes like Trouty's out there for £2k, you can alternatively buy a standard road 620 for less than that.

Going the carbed 750 route may well have tyre implications as well as the age of the engines and spares availability

some may find this of interest

http://www.bikeboy.org/comp2vmodels.html

750 bottom end, 583 cyls, 620 pistons , 750 heads..............