🔩 Showa 43mm Big Piston Fork
Showa's 43mm Big Piston (BPF) inverted fork is OEM equipment on Honda, Kawasaki, and Suzuki superbikes. The "Big Piston" design uses a cartridge piston diameter matching the outer tube — nearly double the conventional cartridge — which reduces stiction and provides more progressive compression damping.
Suspension
Technical Specifications
| Type | Inverted (USD) Cartridge Fork |
|---|---|
| Tubes Diameter | 43 mm |
| Piston Type | Big Piston (BPF) cartridge |
| Travel | 120 mm (superbike) / 130 mm (naked) |
| Adjustments | Compression and rebound (18 clicks each) |
| Spring Rate | Application-specific |
| Finish | Kashima coat (premium version) |
| Manufacturer | Showa Corporation, Saitama, Japan |
| Msrp | $1,800–$3,200 per unit (OEM) |