long distance remote Gilera tuneups are still at beta state
As HP tells, the Saturnos are not one of those long stroke tracktor single cylinders like the old style Horex have been.
Reving up is not a bad idea
What makes me wondering is, you wrote .... typically this is during deceleration....
Issues with the engine should be noticed first under heavy load, i think.
The problem with the 'shit' metall piece in the fuel tank is also well know here.
But the noise this thing will make when it's broken is that loud that you will stop at once to see what's wrong.
Another thing which is not very common is the noise of the full floater front brake disc.
First time i heard this i stopped to have a look
But this will appear due to bad road conditions.
And you should notice that the source of the rattle comes more from the front area.
So it will be a good idea to check first what HP has mentioned to make shure that there is no serious problem with the engine.
Maybe that there is a part somehwere which is resonating within a specific range of revs.
Mayb it would be wort h to check all parts wether they are well monted or not.
Did you know the british gilera forum at http://www.gilera.org.uk/Joomla/
As far as i remember the member and former Saturno owner Paul has moved to NZ.
Maybe he is somewhere close to you to have a look.
And i think that there are some more members from NZ.
Last but not least, did you have a workshop manual?