This is a complete custom exhaust system specially designed to fit on Yamaha R1 my05; basically removes the catalytic converter and improves the performances of the engine by having larger tubes and better routing.
In this case was designed to fit a couple of carbon fiber final silencers, but could be adapted to any model by using specific flanges.
The whole system is made by stainless steel AISI304 with a thickness of 1mm; diameter of the main pipe is 60mm, secondary branches are 45mm.
Everything is TIG welded and then accurately grinded.
The AIS (Air Induction System) is originally installed to help increasing the engine temperature when started from cold; it makes additonal air coming inside the motor when the cooling liquid temperature id below a given point.
In a ‘race only’ motorcycle this system is not required or useful anymore, so you can remove it and all the connected components; you’ll get a weight reduction and simplify the system!
To make it possible the covers have been modified by closing the neck of connection and adding a bracket to hold the wire harness; the whole air injection circuit has been removed!