On y revient,

pour le passage à l'ethanol trés performant et bon substitut du pétrole (pas du rouge hein Papi), il y toutes les données pour convertir les gicleurs selon Dellorto (qui équipe les Guzzi encore un V twin), en gros il faut multiplier ton gicleur par 1.5 et avoir un bon flux au robinet. Bon boulot et tiens nous au courant.
C'est pas pour rien qu'on a nourri les dragsters à l'alcool (
http://running_on_alcohol.tripod.com/id7.html)
Raph
En Anglais;
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5.1 Change of fuel
When a different fuel other than commercial petrol is used, it is necessary to estimate theoretically the new stoiciometric mixture ratio and consequently change all the jet sizes to suit.
If the stoiciometric mixture ratio decreases, larger jets are required and vice versa. Any such changes should,.of course, be made on a percentage basis ie. when the stoiciometric ratio in creases by a certain percentage, the jet sizes should be reduced by that percentage.
For example, if commercial petrol (stoiciometric ratio 14.5) is replaced by methyl alcohol (methanol, with chemical formula CH3OH - stoiciometric ratio 6.5)
the jet sizes should be increased by about 50 % ie. double the flow rate. If fuel consisting of 25% petrol and 75% methanol is used, jet sizes should all be increased by 30 % with fuel composed of 50 % petrol and 50 % methanol, the jet sizes need only be increased by 18% compared to when using straight petrol.
You should also replace the needlevalves, increasing the seat sizes accordingly.
When using special fuels such as methanol, it is very important that all the component materials of the Carburetor s have been treated, wherever necessary, to resist chemical attack. For example, nylon components should be removed, and replaced by other parts resistant to the new fuel.