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Unread 05-18-2008, 09:41 PM
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Smithers Smithers is offline
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It's been hard to get some answers on just what the differences are between the two tanks that were available between the Mille RSV and the Mille RSVR. Inside the composite tank there are two drain lines built into the fuel tank so that water caught in the fuel cap can drain down and out below the tank. The RSV uses two separate hoses that are attached to the inside nipples from the underside of the fuel fill hole and they connect to 2 nipples that are molded into the fuel pump flange or sending unit. Then the nipples exit under the fuel pump flange and two drain hoses connect to it. These hoses that run inside the steel fuel tank break ALL THE TIME on the older Arilia Mille RSV's and will cause you headaches. When you fill up your tank at the pump you will notice fuel running out of one of your drain hoses. It drove me mad!!

Anyway here are the two tanks. Steel on the left, composite on the right. With the steel tank the fuel cap simply bolts on top and will seal on the recessed ring that is molded into the tank. On the composite tank a whole fuel cap assembly needs to be used that has it's own bottom plate for the fuel cap to latch and seal against.

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