Suzuki RE5 with a SU carburetor conversion

This is a Suzuki RE5 that has had the standard carburetor replaced with a SU carburetor, this removes the flat spot that is apparent on almost all RE5’s (to varying extents) caused by the progression from the small primary venturi to the larger secondary venturi that has to be perfectly aligned with the opening of the port valve.
A CV carburetor removes the need for this precise timing.
The short video shows the bike accelerating through the gears at moderate throttle openings and then a top gear roll-on (through the flat spot zone), the second part is more aggressive accelerating from a standstill through all the gears.