Kawasaki Z900RS vs Triumph Bonneville T120 — Retro Inline-Four vs British 1200 Twin
ENGINEERING & RIDING VERDICT
Z900RS hides modern sportbike chassis sharpness, tubeless ZR17 tires, and a 111 hp inline-four scream beneath 1972 Z1 bodywork; Bonneville T120 delivers effortless 105 N·m torque at 3,500 rpm and authentic 790 mm low-slung British poise.
Side-by-Side OEM Specification & Fluid Matrix
| Specification | Kawasaki Z900RS / Z900RS SE (ZR900) | Triumph Bonneville T120 / Black (1200 HT) |
|---|---|---|
| Engine · Power · Torque | 948 cc · 111 hp · 98.5 N·m | 1200 cc · 80 hp · 105 N·m |
| Seat Height & Wet Weight | 835 mm (32.9 in) · 215 kg (474 lbs) | 790 mm (31.1 in) · 236 kg (520 lbs) |
| Fuel Tank & Est. Range | 17 L → ~320 km (199 mi) | 14.5 L → ~309 km (192 mi) |
| Oil Capacity (With Filter) & Spec | 3.8 L (4.02 US qt) · SAE 10W-40 JASO MA2 | 3.4 L (3.59 US qt) · SAE 10W-40 JASO MA2 |
| OEM Oil Filter | 16097-0008 / HF303 | T1218001 / HF204 |
| Tires & Cold Pressure (Solo) | 120/70ZR17 M/C (58W) / 180/55ZR17 M/C (73W) 36 / 42 PSI (250/290 kPa) |
100/90-18 M/C 56H / 150/70R17 M/C 69H 32 / 36 PSI (220/250 kPa) |
| Spark Plug & Battery | NGK CR9EIA-9 (×4) · YTZ10S / YTX9-BS | NGK LMAR8A-9 (×2) · YTX12-BS |
| Valve Check Interval | 42,000 km | 32,000 km |
DIY Wrenching & Maintenance Cost Differences
Crucial roadside difference: Z900RS rolls on tubeless cast wheels (36/42 PSI), whereas Bonneville T120’s wire-spoke rims require inner tubes! Oil service uses 3.8 L (HF303) on Z900RS vs 3.4 L (HF204) on T120.
02 // ERGONOMIC & SPEC MATRIX
Interactive 1:1 Spec & Seat-Arch Footing Simulator
Calculates real-feel leg reach by factoring in thigh-splay seat arch width and dual-sport suspension sag—not just raw static seat height.