Z1 40th Anniversary Racing Full System Hand Bent Straight Cyclone

Since Yoshimura's establishment in 1954, various innnovative products have been produced through Racing and Race Kit Parts development. Among all these products developed by company founder, POP Yoshimura, the 4-into-1 exhaust system had the heaviest impact on the performance exhaust market. It did not take long before these systems became popular all over the world, showing their speed with the Z1, GS1000, and CB750K via the AMA Racing Series.

Much time has passed since the era of Z1 domination, but the Z1 is still popular all over the world. We are proud of our racing history and pursuing development with the Z1, so what better way to commemorate the 40th Anniversary of the Z1 than a special production, Hand-Made Straight Cyclone Racing Full System. Our concept was to create “Classical style with an up-to-date approach,” that will provide you and your Z1 that nostalgic appearance, while also improving performance.

FEATURES

A proficient craftsman artistically bends headers, one-by-one, heating pipes with a flame-burner
Traditional and accomplished production procedure
42.7mm-diameter steel pipe for header part produces higher performance

Traditional style with 70mm-diameter short straight pipe
Traditional style Yoshimura emblem
Yoshimura name (under emblem) and serial number (on bracket) are incised.

4-into-1 design preserving the nostalgic style
Artistic pipe work by hand bend procedures

Left : Yoshimura Japan exhaust system for Z1 street-legal type
Right : Yoshimura Japan exhaust system for Z1 40th Anniversary (Removable 50.8mm-diameter dB-killer)

Granular surfaced cast flange gives a special flavor which matches the hand bent exhaust system
Both 6mm and 8mm stud bolts are applicable

THE Z1 LEGEND AND YOSHIMURA

March 1973, Daytona Speedway. Everyone was still excited from the Daytona 200 Mile race, won by Jarno Saarinen (Yamaha) the day before. But there was another group that day, excited for what was to come...

It was a scene, perfectly planned by Kawasaki, to promote the Z1 for the first time in the world.

The Z1--code-named: New York Steak--was fitted with Yoshimura's 4-into-1 exhaust system and the engine tuned by Pop Yoshimura, in strict confidence, in Japan. The power output was 106PS/10,000rpm (STD 82PS), while retaining the 903cc engine capacity.

The Yoshimura-Tuned Z1, ridden by Yvon Duhamel, broke many FIM and AMA Speed Records that day. The most highlighted record achieved, “Fastest Closed Circuit” speed ever recorded by FIM officials at 160.19MPH!!

The Z1 running through that one flying lap on the Daytona 31 degree-banking, with Yoshimura 4-into-1 exhaust sound, still lives clearly in my mind.

Z1 40th Anniversary Racing Full System Hand Bent Straight Cyclone