I´m heading the same way. Love riding large aircooled Japanese fours but simply don´t have enough money to keep them in tyres and chains. Petrol is getting silly here (Portugal). Last fill up was 1.61 Euros a litre for cheapest unleaded (95 RON). Been eyeing up a Mash Black 7 250 with a knockoff GN/TU250 engine. The important bit is the 90mpg, skinny tyres that are cheap to buy and stone age simple to service.