// Classe principale :
GameRegistry.registerFuelHandler(new MonFuelHandler());
// MonFuelHandler.java :
package nom.du.package;

import net.minecraft.item.ItemStack;
import cpw.mods.fml.common.IFuelHandler;

public class EndFuelHandler implements IFuelHandler {

        @Override
        public int getBurnTime(ItemStack fuel)
        {
                if(fuel.itemID == ClassePrincipale.monItem.itemID)
                        return 3200;
                       // 200 = un item.
                 else
                        return 0;
        }
}