Beta 390 RR: history, specs, pictures

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Beta 390 RR-S
Manufacturer
Production 2017
Class Enduro
Engine
Single cylinder, 4-stroke, liquid cooled
Bore / Stroke 88.9mm x 88.9mm
Compression ratio 12.5:1
Fuel System Electronic Fuel Injection
Spark Plug NGK LKAR8A-9 ‘15-18[1]
Transmission Gear box: 6-Speed

Final Drive: Chain

Clutch: Wet multi-disc
Final Drive Chain: 520x114 ‘15-18[1]
Rear Sprocket 49T ‘15-18[1]
Suspension Front: 48 mm Sachs USD fork, adjustable compression and rebound, TFX technology
Rear: Aluminum Body Sachs shock w/adjustable rebound and hi/low speed compression
Brakes Front: 260mm rotor
Rear: 240mm rotor
Front Tire 90/90-21 ‘15-18[1]
Rear Tire 140/80-18 ‘15-18[1]
Wheelbase 58.7 inches (1491 mm)
Seat Height 36.81 inches (935 mm)
Weight 118.0 kg (wet)
Fuel Capacity 0.53 Gallon (2.00 Liters)
Manuals Service Manual


The Beta 390 RR-S was a Single cylinder, 4-stroke, liquid cooled Enduro motorcycle produced by Beta in 2017.

Engine[edit | edit source]

A 88.9mm bore x 88.9mm stroke result in a displacement of just 386.0 cubic centimeters.

Drive[edit | edit source]

The bike has a 6-Speed transmission. Power was moderated via the Wet multi-disc.

Chassis[edit | edit source]

Stopping was achieved via 260mm rotor in the front and a 240mm rotor in the rear. The front suspension was a 48 mm Sachs USD fork, adjustable compression and rebound, TFX technology while the rear was equipped with a Aluminum Body Sachs shock w/adjustable rebound and hi/low speed compression. The 390 RR-S was fitted with a 0.53 Gallon (2.00 Liters) fuel tank. The wheelbase was 58.7 inches (1491 mm) long.

2017 Beta 390 RR-S[edit | edit source]

Many improvements and updates have been included on the 2017 lineup. All to enhance the riding experience. One big change is the new RR -S model line Beta calls “Street Legal Off Road”. These models are basically off road race/play bikes that have been approved for the street in all 50 states.

References[edit | edit source]

  1. 1.0 1.1 1.2 1.3 1.4 2019 Western Power Sports Catalog. Western Power Sports. 2019.