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The Yasuni 4 range is the evolution of the line created for the 4 strokes Scooters.

• 40% less weight than original exhaust
• The fasteners and components are made of stainless steel AISI-304
• High mechanical strength
• Respects EEC noise tests (e9)

In order to fully comply to the emission strandard (e5), installation the catalytic converter (optional) is necessary, see ref.