2017 Beta 390 RR Race Edition Dirt Bike Torque Specs
Shop parts for a 2017 Beta 390 RR Race Edition Dirt Bike.
The 2017 Beta 390 RR Race Edition receives the same frame redesign as the entire four-stroke enduro lineup — a new chrome-moly steel chassis with revised geometry, updated bodywork, and modern ergonomics. The 389cc DOHC four-valve single carries over into the new structure with competition-grade KYB suspension, ergal footpegs, and factory livery. This is the first 390 Race Edition on the redesigned platform, meaning every chassis torque value applies to new mounting points and load paths. Break-in verification of chassis fasteners during early use establishes confidence that the new frame and engine have settled correctly under competition loading.
Engine Torque Specifications
| 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
All chassis fasteners apply to the redesigned frame. Verify engine mounts, swingarm pivot, subframe, and linkage after the first several competition sessions.
| 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 |
Drivetrain & Wheels
| 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. All other values assume dry threads. The 390’s 45 Nm head bolt spec requires careful wet torque correction.
New Frame + Race Pace
The redesigned chassis under race loading accelerates the break-in process. Competition forces seat new welds and mounting points faster than trail riding. The 390’s mid-displacement torque provides substantial chassis loading without the extreme forces of the larger engines. Post-race verification during the first season on the new frame is essential. Once the chassis is settled, standard competition torque maintenance keeps the 390 Race Edition performing reliably at race intensity.
Thread Locker Recommendations
Medium-strength (blue) thread locker for the 2017 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 redesigned 390cc Race Edition.
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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.