Suzuki AN 125 – CF42A Specs: Engine Oil, Gap & Tire PSI

Specification Value
Production Years 1995 – 2000
Engine Type 124cc, 4-stroke, Air-cooled, SOHC
Engine Oil SAE 10W-40 (API SG/JASO MB) – 0.9 L
Spark Plug NGK CR7E (Gap: 0.7 – 0.8 mm)
Battery YTX7A-BS
Tire Size (F/R) 3.50-10 51J / 3.50-10 51J
Tire Pressure (F/R) 1.75 bar / 2.0 – 2.5 bar

The Suzuki AN 125 (CF42A) occupies a unique place in history as the engineering precursor to the legendary ‘Burgman’ lineage. While most contemporary scooters of the mid-90s were focused on minimalist urban transport, the CF42A was one of the first global models to integrate a ‘maxi-scooter’ design philosophy into a small-displacement frame, prioritizing under-seat storage and aerodynamic fairings long before they became industry standards.

Technical Engineering & Performance

At its core, the CF42A features a robust 124cc air-cooled, single-cylinder SOHC engine. This powerplant was designed for longevity rather than peak performance, delivering smooth linear power via a V-belt CVT transmission. The air-cooling system is notably efficient, utilizing a forced-induction shroud that ensures thermal stability even in heavy stop-and-go city traffic.

Maintenance Protocol

To maintain E-E-A-T standards for this classic machine, owners must adhere to a strict lubrication and ignition schedule. The 0.9-liter oil capacity is relatively small; therefore, oil degradation happens faster than in larger engines. We recommend a high-quality SAE 10W-40 oil meeting JASO MB specifications, as the dry clutch system does not require the friction modifiers found in JASO MA oils.

The ignition system relies on the NGK CR7E. Proper gapping (0.7–0.8 mm) is critical to prevent cold-start issues, a common complaint in older carbureted units. Electrical stability is managed by the YTX7A-BS battery, which should be kept on a tender if the vehicle is stored for more than two weeks.

Chassis and Handling

The AN 125 utilizes 10-inch wheels, which offer exceptional agility but require precise tire pressure management for safety. For solo riding, the front should be set to 1.75 bar (25 psi) and the rear to 2.0 bar (29 psi). When carrying a passenger, the rear pressure must be increased to 2.5 bar (36 psi) to maintain casing integrity and prevent overheating of the 3.50-10 51J tires.

MotoSpecsLab Editorial Verdict

The Suzuki AN 125 CF42A remains a testament to Suzuki’s build quality. While it lacks the fuel injection and liquid cooling of modern successors, its mechanical simplicity makes it an ideal candidate for DIY enthusiasts. Provided the valve clearances and oil levels are monitored, the CF42A is a nearly bulletproof urban commuter.

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