2016 Beta 390 RR Dirt Bike Torque Specs
Shop parts for a 2016 Beta 390 RR Dirt Bike.
In its second year, the 2016 Beta 390 RR carries forward the 389cc DOHC four-valve single with electronic fuel injection and a six-speed gearbox in the steel perimeter frame. Refined suspension settings on the KYB 48mm fork and Sachs rear shock improve the 390’s trail manners. The 390 occupies a compelling middle ground in Beta’s four-stroke enduro range — more torque than the 350 for hill climbs and deep terrain, less aggressive than the 430 for long rides. Riders choosing the 390 value its balanced character, and precise torque discipline keeps that balance intact through the engine, drivetrain, and chassis.
Engine Torque Values
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Spark Plug | 12 | 9 |
| Cylinder Head Bolts | 45 | 33 |
| Cylinder Base Bolts | 25 | 18 |
| Valve Cover Bolts | 10 | 7 |
| Cam Sprocket Bolts | 12 | 9 |
| Oil Drain Plug | 20 | 15 |
| Oil Filter Cover Bolts | 10 | 7 |
| Flywheel/Rotor Nut | 75 | 55 |
| Clutch Hub Nut | 75 | 55 |
Suspension & Chassis
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Swingarm Pivot Bolt | 70 | 52 |
| Lower Triple Clamp Pinch Bolts | 12 | 9 |
| Upper Triple Clamp Pinch Bolts | 20 | 15 |
| Handlebar Clamp Bolts | 15 | 11 |
| Shock Upper Mount | 50 | 37 |
| Shock Lower Mount | 50 | 37 |
| Linkage Bolts | 40 | 30 |
| Subframe Bolts | 25 | 18 |
| Engine Mount Bolts | 45 | 33 |
Wheels & Drivetrain
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Front Axle Nut | 50 | 37 |
| Rear Axle Nut | 100 | 74 |
| Front Sprocket Bolt | 50 | 37 |
| Rear Sprocket Nuts | 30 | 22 |
| Chain Adjuster Lock Nuts | 18 | 13 |
Brakes
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Front Caliper Bolts | 30 | 22 |
| Rear Caliper Bolts | 25 | 18 |
| Front Disc Bolts | 10 | 7 |
| Rear Disc Bolts | 10 | 7 |
| Front Master Cylinder Clamp | 10 | 7 |
| Rear Master Cylinder Mount | 10 | 7 |
Dry vs. Wet Torque
Oil drain plug: always wet; reduce 15–20% with sealant. The 390’s 45 Nm head bolt spec requires careful wet torque correction — compound present at 45 Nm can exceed 55 Nm effective clamping. All other values assume dry threads.
Balanced Displacement, Balanced Maintenance
The 390’s appeal is balance — enough torque for demanding terrain without the intensity of the 430. That balance extends to maintenance. The 390 produces more heat and force than the 350, requiring attention to the higher head bolt and flywheel specs. The oil system works harder than the 350’s at sustained power output. Consistent torque on engine, drivetrain, and chassis hardware preserves the 390’s defining character: capable power delivered in a manageable, rider-friendly package.
Thread Locker Application
Medium-strength (blue) thread locker for the 2016 Beta 390 RR:
- Rear sprocket nuts
- All disc bolts
- Linkage bolts
- Subframe bolts
- Exhaust header bolts
- Skid plate bolts
Torque Wrench Selection
A 3/8-inch drive click-type for 20–100 Nm and a 1/4-inch drive for 10–12 Nm hardware. Two drive sizes for the balanced 390cc four-stroke enduro.
Related Shopping Categories
Shop Torque Wrenches for a 2016 Beta 390 RR Dirt Bike.
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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.