OVER Racing SESMIC-IV 3-1 Full Exhaust System – Yamaha XSR900 GP / XSR900

Classic 1980s Racing Style. Modern Japanese Performance Engineering.

Bring the unmistakable look and sound of 1980s Japanese racing motorcycles to your Yamaha with the OVER Racing SESMIC-IV 3-1 Full Exhaust System.

Designed specifically to complement the retro racing character of the Yamaha XSR900 GP and XSR900, this premium Japanese exhaust combines traditional styling with modern exhaust technology.

Featuring polished stainless steel exhaust headers, a distinctive ribbed aluminium SESMIC-IV silencer and a beautifully finished aluminium mounting stay, the system captures the appearance of classic Japanese performance exhausts.

The compact 3-1 collector layout delivers a clean, purposeful appearance while maintaining compatibility with Yamaha's optional OEM undercowl.

Features

• Genuine OVER Racing SESMIC-IV 3-1 Full Exhaust System

• Classic 1980s Japanese racing-inspired styling

• Distinctive ribbed SESMIC-IV aluminium silencer

• 350mm silencer length

• Polished stainless steel exhaust headers

• Stainless steel 3-1 collector and tail pipe

• Polished aluminium silencer mounting stay

• Compact exhaust routing beneath the engine

• Designed for durability, performance and a distinctive exhaust note

• Manufacturer-stated proximity noise level of 94dB

• Manufacturer-stated acceleration noise level of 80dB

• Compliant with specified Japanese 2016 noise regulations

• Compliant with specified Japanese 2020 exhaust gas regulations

• Compatible with Yamaha's optional OEM undercowl

• Retains access to engine oil drain bolt and oil filter

• Suitable for two-up riding

Specifications

Motorcycle Fitment

Important: Fitment is based on the manufacturer's Japanese domestic market specifications.

Please confirm your motorcycle's model code before ordering, particularly for New Zealand and other international market models.

Performance & Design

Classic SESMIC-IV Racing Style

The SESMIC-IV silencer is the centrepiece of this exhaust system.

Its distinctive ribbed aluminium body recreates the unmistakable appearance of Japanese performance exhausts from the 1980s, perfectly complementing the XSR900 GP's retro Grand Prix styling.

The polished aluminium mounting stay and traditional collector-style pipework complete the period-inspired appearance.

Modern 3-1 Exhaust Engineering

Behind its classic appearance, the SESMIC-IV incorporates modern exhaust design and manufacturing technology.

The polished stainless steel headers feature diameters ranging from Ø38.1mm to Ø42.7mm, feeding into a 3-1 collector and Ø60.5mm stainless steel tail pipe.

OVER Racing has revised the exhaust pipe routing to keep the area beneath the engine compact without compromising the system's distinctive styling.

The result is a carefully engineered combination of traditional appearance, durability and performance.

Distinctive Exhaust Sound

The SESMIC-IV is designed to deliver a satisfying exhaust note while meeting the manufacturer's specified Japanese noise requirements.

Manufacturer-stated sound levels:

• Proximity noise: 94dB

• Acceleration noise: 80dB

The system is specified as compliant with the applicable Japanese 2016 noise and 2020 exhaust gas regulations for the listed models.

Compatible with Yamaha's Optional Undercowl

One of the key advantages of this system is its compatibility with Yamaha's optional OEM undercowl.

OVER Racing has specifically designed the exhaust routing to maintain a compact layout beneath the engine, allowing owners to retain the XSR900 GP's distinctive racing-inspired appearance.

Designed for Everyday Practicality

Despite its full exhaust configuration, the SESMIC-IV retains important maintenance and usability features.

• Engine oil drain bolt: Accessible

• Oil filter replacement: Compatible

• Two-up riding: Compatible

• Yamaha optional OEM undercowl: Compatible

These features make the SESMIC-IV a practical option for riders seeking classic exhaust styling without sacrificing routine servicing access.

Japanese Regulatory Compliance

The OVER Racing SESMIC-IV is specified as compliant with:

• Japanese 2016 motorcycle noise regulations

• Japanese 2020 exhaust gas regulations

Important: Compliance with Japanese regulations does not automatically establish compliance with New Zealand road-use, noise, emissions or vehicle inspection requirements.

Customers should confirm local requirements before purchasing or installing the exhaust for road use.

Important Information

• Genuine OVER Racing Japanese aftermarket exhaust system.

• Designed for the specified Yamaha XSR900 GP and XSR900 Japanese market models.

• Confirm motorcycle model code and compatibility before ordering.

• Compatibility with international market models is not guaranteed.

• Compatible with Yamaha's specified optional OEM undercowl.

• Compatibility with other aftermarket components has not been confirmed.

• Japanese regulatory compliance does not guarantee New Zealand road legality.

• Product images may show additional accessories or components not included.

• Any supplied installation instructions may be written in Japanese.

• Manufacturer specifications may change without notice.

• Professional installation is recommended.

Special Order Information

This premium Japanese exhaust system may be sourced specifically for your order.

Special-order cancellations and change-of-mind returns may be restricted once the supplier order has been placed. Your rights under applicable New Zealand consumer law remain unaffected.

Please confirm your motorcycle's model, year and compatibility before ordering.

1980s Racing Heritage. Modern OVER Racing Engineering.

The OVER Racing SESMIC-IV 3-1 Full Exhaust System is an ideal choice for Yamaha XSR900 GP and XSR900 owners seeking a distinctive Japanese exhaust with authentic retro racing character.

With its ribbed aluminium silencer, polished stainless steel pipework, compact 3-1 layout and compatibility with Yamaha's optional undercowl, the SESMIC-IV delivers the classic appearance of the 1980s with the benefits of modern Japanese engineering.

Japanese Performance • Classic to Contemporary

BUSHIDŌ MOTORCYCLES