Hi wondering what size header tank people use for the R1's im using a polo rad would be great if someone could specify capacity, pipes sizes and what pressure cap to use or whether its the same as the R1 ie:

As per Haynes YZF-R1 98-03

Cap Valve opening pressure..........13.5 to 18.1 psi (0.93 to 1.25 bars)

Or doesnt it matter what the capacity is ?