Kawasaki S2, S2A Mach II 350cc & S3 400 – Classic Two-Stroke Triples
The Kawasaki S2 Mach II 350cc (1972) and its updated 1973 S2A Mach II model are iconic motorcycles from Kawasaki’s legendary early 1970s two-stroke triple series. Designed as an entry-level model alongside the S1 250 Mach I, these bikes offered riders an accessible introduction to Kawasaki’s Mach series. The S2 is known for their lightweight design, aggressive performance, and signature two-stroke character and sound, these bikes captured the attention of entry level riders worldwide.
The 1972 S2 Mach II had original colors including Pearl Candy Red or Pearl Candy White. They featured drum brakes, rear and front reflectors, and 24mm Mikuni carburetors. The 1973 S2A Mach II introduced key enhancements such as a front disc brake, chrome fenders, redesigned fuel tank with locking gas cap, modernized tail section, updated gauges, and new seat cover with metal accents, available in Candy Orange or Candy Blue.
These S2 350 models highlight the evolution of Kawasaki’s Mach triple series, offering modern classic styling and dependable two-stroke performance for beginning enthusiasts seeking the thrill of a triple without stepping up to the more powerful H1 500 Mach IV and not yet ready for the H2 750 Mach V widow maker. The S2 350cc was replaced by the S3 400cc Mach III in 1974.
The Kawasaki S2 Mach II 350cc (1972) and its updated 1973 S2A Mach II model are iconic motorcycles from Kawasaki’s legendary early 1970s two-stroke triple series. Designed as an entry-level model alongside the S1 250 Mach I, these bikes offered riders an accessible introduction to Kawasaki’s Mach series. The S2 is known for their lightweight design, aggressive performance, and signature two-stroke character and sound, these bikes captured the attention of entry level riders worldwide.
The 1972 S2 Mach II had original colors including Pearl Candy Red or Pearl Candy White. They featured drum brakes, rear and front reflectors, and 24mm Mikuni carburetors. The 1973 S2A Mach II introduced key enhancements such as a front disc brake, chrome fenders, redesigned fuel tank with locking gas cap, modernized tail section, updated gauges, and new seat cover with metal accents, available in Candy Orange or Candy Blue.
These S2 350 models highlight the evolution of Kawasaki’s Mach triple series, offering modern classic styling and dependable two-stroke performance for beginning enthusiasts seeking the thrill of a triple without stepping up to the more powerful H1 500 Mach IV and not yet ready for the H2 750 Mach V widow maker. The S2 350cc was replaced by the S3 400cc Mach III in 1974.
1972 Kawasaki S2 Mach II 350cc – Specifications & Details
Identification Numbers
- Frame Number: S2F-00001
- Engine Number: S2E 00001
- Pearl Candy Red – The only color sold in the United States
- Pearl Candy White – was available in other countries
- Rear reflectors on the tail section
- Front reflectors on the fork ears
- Drum brakes (front and rear)
- 24mm Mikuni VM24 carburetors
- Part of Kawasaki’s iconic early-1970s two-stroke triple series.
- The S2 350 Mach II stood alongside the S1 250 Mach I, H1 500 Mach IV, and H2 750 Mach V, delivering its lightweight agility and signature Kawasaki two-stroke performance.
1973 Kawasaki S2A Mach II 350cc – Specifications & Features
Identification Numbers
Frame Number: S2T-00001
Engine Number: S2E 028226
Original Colors:
The 1973 Kawasaki S2A Mach II 350cc introduced several notable improvements:
Identification Numbers
Frame Number: S2T-00001
Engine Number: S2E 028226
Original Colors:
- Candy Orange
- Candy Blue
The 1973 Kawasaki S2A Mach II 350cc introduced several notable improvements:
- Front Disc Brake – Enhanced stopping power for safer rides.
- Chrome Fenders – Sleek styling with durable chrome finish.
- Rear Shocks and Forks with Reflectors – Improved visibility and safety.
- Redesigned Fuel Tank – Includes a secure locking gas cap for convenience.
- Updated Tail Section – Streamlined design without reflectors.
- Curved Grab Rail – Modern styling and passenger comfort.
- Updated Instrument Gauges – Center console for easier reading.
- New Kickstart Lever – Improved ergonomics for reliable starts.
- Revised Seat Cover – Features a metal accent strip for style.
1974 Kawasaki S3 400 – Improved Performance and EfficiencyIn 1974, Kawasaki introduced the new S3 400, replacing the S2 350 in their two-stroke triple lineup. The S3 was designed to compete with its class competitors like Yamaha’s RD350, Honda’s CB350, and Suzuki’s GT380, offering riders a more advanced and efficient alternative than is S2 350 predecessor. Unlike the gas-guzzling S2, H1, and H2 models, the S3 delivered impressive fuel efficiency, averaging over 10 mpg more than the 1973 S2. This made it an attractive choice for riders looking for the thrill of a two-stroke triple without sacrificing fuel economy.
1974 S3 400 Mach II
Frame Number Range: S3F-00001
Engine Number Range: S3E 00001
Colors: Candy Red / Candy Sky Blue
Side covers Have Mach II under the 400 badge
Frame Number Range: S3F-00001
Engine Number Range: S3E 00001
Colors: Candy Red / Candy Sky Blue
Side covers Have Mach II under the 400 badge
1975 S3A
Frame Number started at S3F-14300
Engine Number Range: S3E 14300
Colors: Candy Green / Candy Super Red
Side covers no longer have Mach II under the 400 badge
6 bearing crank
Frame Number started at S3F-14300
Engine Number Range: S3E 14300
Colors: Candy Green / Candy Super Red
Side covers no longer have Mach II under the 400 badge
6 bearing crank
1976 KH400-A3
Frame Number Range: S3F-26200
Engine Number Range: S3E 26200
Colors: Candy Red, Dark Green, Orange, Brown
Frame Was strengthened at the steering head and near shock mounts
CDI ignition
Designed to run on low octane unleaded gas
9" front brake disc
Frame Number Range: S3F-26200
Engine Number Range: S3E 26200
Colors: Candy Red, Dark Green, Orange, Brown
Frame Was strengthened at the steering head and near shock mounts
CDI ignition
Designed to run on low octane unleaded gas
9" front brake disc
1977 KH400-A4
Frame Number Range: S3F-33601
Engine Number Range: S3E 33601
Colors: Candy Emerald Green / Candy Purple
Frame Number Range: S3F-33601
Engine Number Range: S3E 33601
Colors: Candy Emerald Green / Candy Purple
1978 KH400-A5
Frame Number Range: S3F-42801
Engine Number Range: S3E 42801
Colors: Candy Persimmon Red / Candy Lime Green
Not sold in USA
Frame Number Range: S3F-42801
Engine Number Range: S3E 42801
Colors: Candy Persimmon Red / Candy Lime Green
Not sold in USA
1979 KH400-A6
Frame Number Range: S3F-45901
Engine Number Range: S3E 45901
Not sold in USA
Frame Number Range: S3F-45901
Engine Number Range: S3E 45901
Not sold in USA
1980 KH400-A7
Frame Number Range: S3F-46601
Engine Number Range: S3E 46601
Not sold in USA
Frame Number Range: S3F-46601
Engine Number Range: S3E 46601
Not sold in USA