Got the idea off Andrew Grahams Aprilia RS250.
Along with the grafted on TZ250 electrics, carbs and seperate aluminium ram air boxes,
handmade custom racepipes, Ohlins shock and Ohlins kitted TZ forks, hyperpro damper
(If they had that worship smilie on this forum I'd use it)
he had an aluminium fuel tank. It sat behind the carbs, and under the seat, to centralise mass.
Used the TZ fuel pump to get the fuel to the carbs. All that was under the shroud was empty space...
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The Chopster