2018 Beta 390 RR Race Edition Dirt Bike Torque Specs
Shop parts for a 2018 Beta 390 RR Race Edition Dirt Bike.
In its second year on the redesigned chassis, the 2018 Beta 390 RR Race Edition benefits from a full production cycle of refinement. The 389cc liquid-cooled DOHC four-valve single with EFI and six-speed gearbox pairs with the validated chrome-moly steel frame, competition-tuned KYB fork, Sachs rear shock, ergal footpegs, and factory graphics. The frame’s load paths are proven through a year of competition use, and the 390’s balanced mid-displacement character continues to reward riders in cross-country and hare scramble formats. With the chassis sorted, attention shifts to maintaining the engine and drivetrain under sustained competition loading.
Engine Hardware
| 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 |
Chassis & Suspension
| 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. Competition oil change frequency accelerates drain plug wear. All other values assume dry threads.
Clutch & Drivetrain Under Race Loading
The 390 Race Edition’s clutch sees heavy use in competition. Frequent clutch-in launches, aggressive downshift blipping, and sustained slipping through technical sections load the clutch hub nut at 75 Nm. After any clutch basket or friction plate service, verify the hub nut torque. The 390’s mid-displacement torque loads the drivetrain hardware significantly — front sprocket bolt at 50 Nm and rear sprocket nuts at 30 Nm should be verified post-race alongside axle nuts.
Thread Locker Application
Medium-strength (blue) thread locker for the 2018 Beta 390 RR Race:
- Rear sprocket nuts
- All disc bolts
- Linkage bolts
- Subframe bolts
- Exhaust header bolts
- Skid plate bolts
Refresh every 10–15 hours of competition use.
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 validated 390cc Race Edition.
Related Shopping Categories
Shop Torque Wrenches for a 2018 Beta 390 RR Race Edition Dirt Bike.
Shop Wrenches and Sockets for a 2018 Beta 390 RR Race Edition Dirt Bike.
Shop Thread Locker for a 2018 Beta 390 RR Race Edition Dirt Bike.
Shop Additional Tools for a 2018 Beta 390 RR Race Edition Dirt Bike.
Shop Penetrating Oil for a 2018 Beta 390 RR Race Edition Dirt Bike.
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.
