Yoshimura Japan Machine-Bent GP-MAGNUM Cyclone EXPORT SPEC Government Certified… Four silencer types available (see prices below)
Compatible models: Honda Super Cub C125 2018/2019/2020/2021/2022/2023/2024.
Vehicle model: 8BJ-JA71: 2024 / 8BJ-JA58: 2021-2023 / 2BJ-JA48: 2018-2020.
Engine model: JA71E: 2024 / JA58E: 2021-2023 / JA48E: 2018-2020.

The exhaust pipe is made of rust-resistant stainless steel. The silencer in the photo is an SC carbon cover.

SC carbon cover
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STB Titanium Blue Cover

SSF satin finish cover
The GP-MAGNUM Cyclone is a muffler developed to enhance the performance, sound, and styling of your Super Cub C125, allowing you to enjoy it even more whether you’re riding leisurely and feeling the engine’s pulsating heartbeat, enjoying the ride, or parking it in the garage.
A sporty silencer with a slightly upward-oriented layout is attached to the end of the straight exhaust pipe. It also achieves potential that exceeds the standard output characteristics across the entire range. Power is significantly increased especially in the low and high rpm ranges, greatly improving the power feel when starting off or cruising at high speeds.
The GP-MAGNUM Cyclone weighs 2.7kg (carbon cover) compared to the standard muffler’s 3.9kg, making it approximately 37% lighter. This contributes greatly to a lighter ride.
The sound is characterized by the powerful bass that only a full exhaust can produce. In order to suppress the harsh exhaust noise that is unique to single-cylinder engines, a special silencer structure has been added, resulting in a comfortable sound quality that does not tire you out even when riding for long periods of time.
The exhaust pipe is made of rust-resistant stainless steel. Silencers are available in four types (prices vary depending on the type).
EXPORT SPECとは
このEXPORT SPECは、海外の拘ったユーザーのリクエストを反映する事により、性能を重視しつつ職人的なTig(溶接)の焼け色や加工跡はオリジナルのままで仕上げている。素材に高耐久ステンレスを使用することにより、ヨシムラ独自のデザイン・スタイルを実現させながらもコストパフォーマンスにも優れた価格を実現。●Exhaust pipe: Stainless steel
●Government certified muffler/JMCA certified
●Complies with exhaust gas regulations/noise regulations
●2-year product warranty included
*Part of the production process for this cyclone is carried out at Yoshimura Asia (Thailand).

The Yoshimura logo is placed on the muffler spring’s anti-resonance rubber.
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Super Cub C125 (18-20/21-23/24) Mechanically-tuned GP-MAGNUM Cyclone Muffler Sound / YOSHIMURA-TV
Choose from four silencers to suit your budget and preferences
SS Stainless Steel Cover… 47,300 yen (tax included) / Parts No. 110A-44G-5U51 / Weight: 3.0 kg (STD: 3.9 kg)

SSF Satin Finish Cover … 49,500 yen (tax included) / Part No. 110A-44G-5U31 / Weight: 3.0 kg (STD: 3.9 kg)

STB Titanium Blue Cover …58,300 yen (tax included) / Parts No. 110A-44G-5U81B / Weight: 2.9 kg (STD: 3.9 kg)
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SC Carbon Cover …60,500 yen (tax included) / Parts No. 110A-44G-5U91 / Weight: 2.7 kg (STD: 3.9 kg)

| Vehicle model | 8BJ-JA71: 2024 |
| 8BJ-JA58: 2021-2023 | |
| 2BJ-JA48: 2018-2020 | |
| Engine model | JA71E: 2024 |
| JA58E: 2021-23 | |
| JA48E: 2018-2020 | |
| Automobile Emissions Test Result Certificate (Gas Report) | Mufflers for vehicles under 250cc do not require an exhaust gas test result certificate, so they are not included with the product and are not sold. |
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| Nearby exhaust noise | 90dB/3,750rpm: 8BJ-JA71 |
| 88dB/3,750rpm: 8BJ-JA58 | |
| 87dB/3,750rpm: 2BJ-JA48 | |
| Acceleration noise | 79dB: 8BJ-JA71 |
| 79dB: 8BJ-JA58 | |
| 77dB: 2BJ-JA48 |



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Super Cub C125 (18-20/21-23/24) Mechanically-tuned GP-MAGNUM Cyclone Muffler Sound / YOSHIMURA-TV



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