| Component | Specification |
|---|---|
| Production Years | 2017 – 2020 |
| Engine Oil | SAE 5W-40, API SL / JASO MA2 (4.0 L) |
| Tire Size | F: 120/70 ZR 17 / R: 180/55 ZR 17 |
| Tire Pressure | F: 2.5 bar / R: 2.9 bar |
| Spark Plug | NGK MAR8B-JDS |
| Battery | YTX14-BS |
Engineering Highlight: The 0J01(1N12) iteration of the BMW R NineT represents a pivotal moment in the heritage line’s history. While forced to comply with stringent Euro 4 emissions standards, BMW engineers managed to retain the character of the 1,170cc air/oil-cooled boxer by implementing a revised engine mapping and a larger catalytic converter system. Unlike the later Euro 5 models which saw a slight dip in peak torque for emissions compliance, the Euro 4 0J01 is often cited by purists as the “sweet spot” for its raw mechanical feedback and unmuted exhaust note.
Technical Engineering & Performance
The 0J01 model features the DOHC (Double Over Head Camshaft) boxer engine. This power unit is renowned for its low-end grunt and reliability. The transition to Euro 4 involved the addition of a carbon canister for evaporative emissions and an OBD-II diagnostic interface, making this generation the first to offer modern digital transparency for DIY mechanics and professional technicians alike.
Maintenance Guide & Fluid Specifications
1. Lubrication System
The 0J01 requires exactly 4.0 liters of high-performance synthetic oil. To maintain the integrity of the wet clutch and internal components, SAE 5W-40 meeting API SL / JASO MA2 standards is mandatory. MotoSpecsLab recommends checking the oil level via the sight glass only when the engine is at operating temperature and the bike is on a level stand.
2. Ignition & Electrical
The ignition system relies on the NGK MAR8B-JDS spark plugs. These dual-electrode plugs are critical for the efficient combustion required by Euro 4 sensors. For electrical reliability, the YTX14-BS battery provides the necessary cold-cranking amps (CCA) to turn over the heavy horizontally-opposed pistons in cold weather.
3. Chassis & Handling
Optimal handling geometry is maintained through precise tire pressure management. The factory recommends 2.5 bar (36.3 psi) for the front 120/70 ZR 17 tire and 2.9 bar (42.1 psi) for the rear 180/55 ZR 17. Deviating from these pressures significantly impacts the turn-in characteristics of the Paralever rear suspension.
MotoSpecsLab Verdict
The BMW R NineT (Euro 4) 0J01 is a masterpiece of modern-retro engineering. It balances the soul of the original 2014 release with the necessary refinements of late-2010s technology. For the owner, adherence to the 5W-40 oil spec and NGK plug intervals is the key to ensuring this boxer remains a lifetime companion.
Frequently Asked Questions
Q: Can I use 10W-40 oil instead of 5W-40?
A: While 10W-40 is common, BMW specifically designates 5W-40 for the 0J01 to ensure rapid lubrication during cold starts, which is vital for the overhead cams.
Q: How often should I change the NGK MAR8B-JDS plugs?
A: Standard service intervals suggest every 20,000 km (approx. 12,000 miles), though performance-oriented riders often inspect them every 10,000 km.