Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > No Modifications - what does it mean

[Scooter916]

What markings are on your piston, I have 2 used ones that are still very useable, Yours for now't if they are the correct ones.
Glyn

Originally Posted by vespa

..as if I have not looked for one...No chance. Let me know if you find one please.


because the front piston is grooved and I cannot find a replacement. A dealer
has a HC pistons but no OEM which are unavailable even in Bologna unless you buy the barrel.

I am not looking for increased performance, just peace of mind that my engine will not blow up. There is no point in giving out obviously not pertinent comment on forks and tyres.

Thanks

[vespa]

What markings are on your piston, I have 2 used ones that are still very useable, Yours for now't if they are the correct ones.
Glyn

Thanks a lot Glyn,
What do you mean by markings? I know that the brand is MP but if you have 2 of the same brand available it won't matter. My front piston is grooved unfortunately...

[chris.p]

Matt & I have spoken, well argued about this, what is the factory tolerence on wheight, is it "A" - x and + X if so, then that could solve the argument and the rules could be changed to allow balancing (only) of the crank, but not polishing or knife edging but stay with in the wheight tolerences of the factory original specification.


Chris

[skidlids]

Originally Posted by chris.p

Matt & I have spoken, well argued about this, what is the factory tolerence on wheight, is it "A" - x and + X if so, then that could solve the argument and the rules could be changed to allow balancing (only) of the crank, but not polishing or knife edging but stay with in the wheight tolerences of the factory original specification.


Chris

Chris it would not be easy to police, as I have already mentioned doing it on weight would require the crank to be fully stripped from the bike and then weighed on accurate scales and compare to a verified factory figure with a +/- tolerance.

and as the RC don't have to stump up any protest money (see extract from rule 2.1.1 below) is it worth the risk/cost of having a bike that is thought not to comply with the rules

2.1.1 Compliance Control
are placed in a parc-fermé for a period of at least 30 minutes.

Any motorcycle can be checked for compliance with these rules, and any other technical requirement, if requested by a representative of the DSC Race Committee.

The DSC Race Committee may require a rider or team to provide such parts or samples as they deem necessary without the need to resort to the ACU protest procedure.


At no point do you have to ask your engine builder to balance the crankshaft and they can't make you do it, the rules clearly say No Modifications, its the same rule for everybody.

[chris.p]

Originally Posted by skidlids

Chris it would not be easy to police, as I have already mentioned doing it on weight would require the crank to be fully stripped from the bike and then weighed on accurate scales and compare to a verified factory figure with a +/- tolerance.

and as the RC don't have to stump up any protest money (see extract from rule 2.1.1 below) is it worth the risk/cost of having a bike that is thought not to comply with the rules

2.1.1 Compliance Control
are placed in a parc-fermé for a period of at least 30 minutes.

Any motorcycle can be checked for compliance with these rules, and any other technical requirement, if requested by a representative of the DSC Race Committee.

The DSC Race Committee may require a rider or team to provide such parts or samples as they deem necessary without the need to resort to the ACU protest procedure.


At no point do you have to ask your engine builder to balance the crankshaft and they can't make you do it, the rules clearly say No Modifications, its the same rule for everybody.

There you go Matt, I think I win


Chris

[Scooter916]

Originally Posted by vespa

Thanks a lot Glyn,
What do you mean by markings? I know that the brand is MP but if you have 2 of the same brand available it won't matter. My front piston is grooved unfortunately...

They have an A or B stamped on the top of the piston usually That is matched to an a or b on the Barrels.
Will check what I have and let you know
Glyn