Suzuki DR-Z400SM SuperMoto (SK44A) — OEM Fluid, Tire Pressure & Maintenance Specs
398cc Liquid-Cooled Single DOHC 4-Valve Frame-In-Tank Dry-Sump Supermoto (5-Speed Wet Multi-Plate) · Source: Suzuki DR-Z400SM (SK44A) Official Owner’s Manual Maintenance Specifications
According to the Suzuki DR-Z400SM (SK44A) Official Owner’s Manual Maintenance Specifications, the 2005–2024 Suzuki DR-Z400SM SuperMoto (SK44A) (chassis SK44A/DR-Z400SM) requires 1.7 L (1.80 US qt) of SAE 10W-40 (JASO MA2, API SG/SH/SJ/SL/SM) engine oil for a drain-only change and 1.8 L (1.90 US qt) with filter service (16510-29F00 / HF139). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (120/70R17 M/C 58H) and 200 kPa / 2.00 bar / 29 PSI rear (140/70R17 M/C 66H), paired with 1× NGK CR8E spark plug(s) and a YT7B-BS battery.
Drain only: 1.7 L (1.80 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~230 km (143 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 10W-50 / SAE 15W-50) · JASO MA2 · API SG/SH/SJ/SL/SM |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.7 L (1.80 US qt) • With filter/strainer: 1.8 L (1.90 US qt) • Complete dry overhaul: 1.9 L (2.01 US qt) |
| OEM Oil Filter Code & Type | 16510-29F00 / HF139 |
| Correct Oil Level Check Method | Dry-sump oil tank — warm engine to operating temperature and check oil tank/frame dipstick immediately after shutdown per OEM procedure (never top up cold) |
| Oil Drain Bolt Torque | 21 N·m (15.5 lb-ft / 2.14 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70R17 M/C 58H · Rear: 140/70R17 M/C 66H (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK CR8E × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YT7B-BS (12V 6.5Ah Slim AGM) |
| Final Drive Maintenance | 520 Sealed Chain (110 links, 15T/41T) — Maintain 40–50 mm long-travel slack |
| Brake Fluid & Coolant | DOT 4 · Suzuki Ethylene Glycol Coolant (~1.25 L across left/right radiators) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 398 cc · 40 hp @ 7,500 rpm · 39 N·m (28.8 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 890 mm (35.0 in) · 146 kg (322 lbs) |
| Fuel Tank & Est. Real-World Range | 10 L (2.6 US gal) · ~23 km/L → ~230 km (143 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 6,000 km • Air Filter / Spark Plug: 12,000 km / 12,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Produced almost unchanged from 2005 through 2024 with a Mikuni BSR36 carburetor, 47 mm Showa USD forks, and 17-inch RK Excel spoke rims, the SK44A DR-Z400SM predates Suzuki’s clean-sheet fuel-injected 2025+ DR-Z4SM.
Oil & Clutch Mechanical Engineering Note
Its front frame backbone doubles as the dry-sump oil tank! Always pull BOTH the lower crankcase drain bolt AND the front frame downtube drain bolt, then refill 1.8 L (with 16510-29F00 / HF139 paper filter) of SAE 10W-40 JASO MA2.
Garage Wrenching Gotchas
- NEVER check DR-Z400SM oil cold—oil drains down from the frame neck tank overnight and reads empty, tricking owners into massive overfills! Always idle 3 minutes, shut off, wait 3 minutes upright, and rest the frame-neck dipstick unthreaded (and inspect the countershaft sprocket nut lock-washer regularly).
- Despite wearing sticky 17-inch street rubber, factory RK Excel spoke rims require inner tubes (unless converted with Outex/Tubliss), and light 146 kg supermoto cold pressures are just 175 kPa (25 PSI) front and 200 kPa (29 PSI) rear solo!
5. Frequently Asked Questions (FAQ)
Where are both oil drain bolts on a Suzuki DR-Z400SM, and how much oil does it take?
Drain both the bottom crankcase plug and the lower front frame downtube plug, replace the right-side 16510-29F00 / HF139 paper element (mind the internal O-ring!), and pour 1.8 L into the steering-neck frame filler.
Why does Suzuki specify only 25 PSI front and 29 PSI rear on the DR-Z400SM?
Weighing just 146 kg wet, standard sportbike pressures (36/42 PSI) prevent carcass flex and ruin supermoto grip—run Suzuki’s specified 175 kPa (25 PSI) front and 200 kPa (29 PSI) rear solo.
How do you prevent carburetor clogging on a DR-Z400SM during winter storage?
Before parking for several weeks, crack the Mikuni BSR36 float-bowl drain screw to empty stale fuel (and never leave the petcock on PRI, which bypasses the vacuum diaphragm).