Moto Morini Seiemmezzo STR (2023) — Specs
Identity
Manufacturer: Moto Morini
Model: Seiemmezzo STR
Category: Motorcycle
Type: Motorcycle
Years: 2023 →
Engine
Displacement (cc): 649
Cylinders: 2
Torque (Nm): 56
Dimensions
Overall length: 2150 mm
Overall width: 810 mm
Overall height: 1180 mm
Wheelbase: 1450 mm
Ground clearance: 155 mm
Weight (kg): 200
Seat height (mm): 810
Tank (L): 16
Tires
Front pressure (bar): 2.4
Rear pressure (bar): 2.5
Drivetrain
Drive chain: 520 chain
Sprockets (front / rear): 15 / 46
Ignition
Spark plug: NGK CR8EI
Fluids & Filters
Engine oil: SAE10W-40, API SN
Engine oil (with filter, L): 2.2
Engine oil (without filter, L): 2
Oil filter: OEM oil filter
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~333 km on a full tank (16.0 L)
Service
Service interval (km): 10000
Service interval (months): 12
Valve check (km): 24000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 10,000 km or 12 months, whichever comes first. Valve clearance check every 24,000 km. Valve clearance — intake cold 0.08-0.13 mm, exhaust cold 0.20-0.26 mm. Engine oil: oil grade SAE10W-40, API SN, 2.2 L with filter change, 2 L without filter change. Spark plug: NGK CR8EI. Brake fluid: DOT 4. Chain: chain drive, sprockets 15/46 teeth. Tire pressure: front 2.4 bar, rear 2.5 bar (cold). Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
Spec: SAE10W-40, API SN, 2.2 L (with filter), 2.0 L (without filter)
- OEM OEM recommended engine oil (SAE 10W-40)
- Premium Motul 7100
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Spark plug
Spec: NGK CR8EI
- OEM NGK CR8EI
- Premium NGK CR8EIIX
Front brake pads
Rear brake pads
Front tire
Spec: 2.4 bar
Rear tire
Spec: 2.5 bar
Brake fluid
Spec: DOT 4
Coolant
Service interval
Spec: 10 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 24 000 km
- OEM Intake clearance: cold 0.08-0.13 mm
- OEM Exhaust clearance: cold 0.20-0.26 mm
Suspension
Spec: 43 mm USD fork
- OEM Fork: 43 mm USD fork
Air filter
Drive chain
Battery
- Premium Yuasa YTX12-BS or YTZ10S (typical 500-750cc)
