What is the 'Monster' muffler by Moriwaki?

A long-selling muffler with a unique shape, heavy sound, and presence crafted by artisans. It has a storied history of being used on race machines since the company's early days.

What is the origin of the nickname 'Monaka Pipe'?

The manufacturing process, which involves pressing two aluminum sheets together, resembles the way traditional Japanese sweets called 'Monaka' are made, hence the nickname.

What are the material and sound characteristics of this muffler?

It is made of stainless steel, providing excellent corrosion resistance. The sound quality suppresses high-frequency noise, delivering a rich and powerful exhaust sound.

Are there any considerations for daily maintenance and practical use?

Unlike many aftermarket mufflers, it is compatible with center stands, making chain maintenance and storage easier.

What is the 'Naps Sports Special Order Series'?

A limited series developed in collaboration with parts manufacturers worldwide, conceptualized by Naps with the theme 'to the next' (the next custom). This is the fourth installment of the series.

『Moriwaki Engineering』×『Naps Sports』: Exclusive Sale of 'Monster Black Exhaust' for Zephyr 750/RS Starts at Naps!!

Published May 25, 2026 6:00 PM ・ Updated Jun 14, 2026 4:15 AM ・ 4 min read ・ Source: PR TIMES

Naps Co., Ltd. has launched the 'Monster Black Exhaust' for the Zephyr 750/RS as the 4th installment of the 'Naps Sports Bespoke Series,' co-planned with Moriwaki Engineering. This masterpiece inherits Moriwaki's traditional 'Monaka-kan' aluminum press manufacturing, merging handcrafted artistry with modern heat-resistant technology.

Naps Co., Ltd. (Headquarters: Yokohama, Kanagawa; CEO: Masahiro Mochizuki) has announced the 'Moriwaki Engineering WITH Naps Sports' parts for the Zephyr 750/RS, in collaboration with custom parts manufacturer Moriwaki Engineering Co., Ltd. (Headquarters: Suzuka, Mie; CEO: Akira Kato).

Under the concept 'For the Ultimate Rider,' Naps launched its private brand 'Naps Sports' in 2022, developing premium products with global motorcycle parts manufacturers. As a new initiative, the 'Naps Sports Bespoke Series' was started under the concept 'to the next.' This release marks the 4th installment of the series, featuring the 'Monster Black Exhaust for Zephyr 750/RS,' sold exclusively at Naps.

Charm of Moriwaki 'Monster' 1. Creative Silencer Shape Known as 'Monaka-kan' The most prominent feature is the unique manufacturing process where two aluminum plates are precision-pressed into 3D shapes and joined together. The nickname comes from its resemblance to the process of making Japanese 'Monaka' wafers. The beautiful weld beads (scale patterns) by skilled craftsmen boast warmth and precision that machines cannot replicate.

2. Stainless Steel and 'Heat-resistant Black Coating' The use of stainless steel provides excellent corrosion resistance and a profound exhaust sound. The unique heat-resistant paint maintains a high-quality texture, and the after-sales support is extensive, including a dedicated touch-up spray.

3. Balance of Serviceability and Practicality While adopting a 4-1 collection system, the internal structure is optimized to balance low-to-mid range torque with high-rev exhilaration. Additionally, it is compatible with the center stand, ensuring ease of daily maintenance.

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Source: PR TIMES
Category: New Product

『Moriwaki Engineering』×『Naps Sports』: Exclusive Sale of 'Monster Black Exhaust' for Zephyr 750/RS Starts at Naps!!

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