What is the hose size on the two coming off the fuel rails to each carb,  and also on the inlet and outlet on the mechanical fuel pump. Thank you. 

Edited February 11, 20188 yr by 882993md

I used 5/16" but I think it calls for 10mm in the FSM.

I think from the fuel rail to the carburetors may be 1/4" or 6 mm. I would think the fuel line between the hard lines and fuel pumps would be 8 mm since 5/16" fits nicely. I would think 10 mm (3/8") would be too loose. That is only my opinion since I didn't look it up in the FSM.

Steve's got it right, I didn't take time to convert to millimeters.  5/16 on the feed, 3/16 on the return is what I have.

thanks guys

16 hours ago, 882993md said:

thanks guys

By yourself a micrometer. Less than $10 at Harbor Freight. Measures inner and outer diameters both standard and metric. A must for DIY'ers.