Beta RS390

Beta RS390
Manufacturer	Beta
Production	2014
Engine	Four stroke, single cylinder
Compression ratio	12.1:1
Ignition	DC-CDI with variable ignition timing, Kokusan.
Spark Plug	NGK LKAR 8A-9
Transmission	6 Speed
Frame	Molybdenum steel with double cradle split above exhaust port. Air filter access from the side
Suspension	Front: Marzocchi USD fork, Ø 45 mm, adjustable compression and rebound, TFX technology Rear: Sachs shock w/adjustable rebound and hi/low speed compression
Brakes	Front: Single Ø 260 mm floating disc, 2 piston caliper Rear: Single Ø 240 mm disc, 1 piston caliper
Front Tire	90/90 -21
Rear Tire	140/80 -18
Wheelbase	1475 mm / 58.1 in
Seat Height	934.7 mm / 36.8 in
Weight	108 kg / 240 lbs (dry),
Fuel Capacity	7.9 L / 2.1 US gal
Manuals	Service Manual

Engine

The engine was a Liquid cooled cooled Four stroke, single cylinder. The engine featured a 12.1:1 compression ratio.

Drive

Power was moderated via the Wet multi-disc.

Chassis

It came with a 90/90 -21 front tire and a 140/80 -18 rear tire. Stopping was achieved via Single Ø 260 mm floating disc, 2 piston caliper in the front and a Single Ø 240 mm disc, 1 piston caliper in the rear. The front suspension was a Marzocchi USD fork, Ø 45 mm, adjustable compression and rebound, TFX technology while the rear was equipped with a Sachs shock w/adjustable rebound and hi/low speed compression. The RS390 was fitted with a 7.9 L / 2.1 US gal fuel tank. The bike weighed just 108 kg / 240 lbs. The wheelbase was 1475 mm / 58.1 in long.

Photos

Overview

Beta RS 350

The RS model range has been designed for the USA market with all three models being 50-state street legal. These premium dual sporters include our famous twin cam 4 stroke powerplant that incorporates a heavier flywheel for chugging power to tackle the tough stuff while the twin cam and short stroke allows amazing over-rev for the faster-paced conditions. The Beta 350 RS. A bike designed for single track trails as well as all-around casual riding. The 350's engine provides enough power and torque for both the casual play rider as well as the serious dual sporter. With its titanium valves and twin-cam engine the 350 RS offers a level of performance that will exceed riders expectations.

Beta 350RS Features and Benefits

Engine: - Redesigned cylinder head including reinforced camshaft bridge, valve retainers, and updated cam chain tensioner to help reduce engine noise. - New clutch primary gear and springs for better engagement and clutch action. - Updated counterbalance bearings for increased reliability. - Stronger cam chain guides - Increased oil volume to the engine cam chain for reduced friction. - New oil drain plug for easier oil changes. Chassis: - All new Sachs 48mm fork with TFX technology, developed by Sachs exclusively for Beta. This new design allows the fork to move through its stroke with very little friction. - New SKF fork seals and wipers with self-lubricating compounds to also reduce stiction. - New triple clamp to match perfectly with the new front fork. - Redesigned frame with extra gussets as well as an increased tube diameter on the lower tubes. This new frame has less flex and has improved stability. - New front and rear brake rotors. - New Brembo clutch master cylinder for a better clutch feel and engagement. - Redesigned muffler (Spark Arrestor) offers better flow while retaining a quiet exhaust note. - Redesigned front headlight and front fender support - Striking new red color for 2013

Make Model	Beta RS 350
Year	2014
Engine Type	Four stroke, single cylinder
Displacement	349 cc / 21.3 cu in
Bore X Stroke	88 x 57.4 mm
Cooling System	Liquid cooled
Compression	12.1:1
Induction	Keihin FCR-MX Ø 39 mm
Lubrication	Twin oil pumps with cartridge oil filter. Separate oil for engine and clutch
Engine Oil Capacity	0.8 L / 0.2 US gal
Ignition	DC-CDI with variable ignition timing, Kokusan.
Spark Plug	NGK LKAR 8A-9
Starting	Electric and kick
Clutch	Wet multi-disc
Gearbox Oil Capacity	0.8 L / 0.2 US gal
Transmission	6 Speed
Final Drive	O-ring chain, DID
Primary Ratio	31:73
Final Ratio	14:45
Frame	Molybdenum steel with double cradle split above exhaust port. Air filter access from the side
Front Suspension	Marzocchi USD fork, Ø 45 mm, adjustable compression and rebound, TFX technology
Front Wheel Travel	290 mm / 11.4 in
Rear Suspension	Sachs shock w/adjustable rebound and hi/low speed compression
Rear Wheel Travel	290 mm / 11.4 in
Front Brakes	Single Ø 260 mm floating disc, 2 piston caliper
Rear Brakes	Single Ø 240 mm disc, 1 piston caliper
Front Tire	90/90 -21
Rear Tire	140/80 -18
Wheelbase	1475 mm / 58.1 in
Ground Clearance	320 mm / 12.6 in
Seat Height	934.7 mm / 36.8 in
Footrest Height	411 mm / 16.2 in
Dry Weight	108 kg / 240 lbs
Fuel Capacity	7.9 L / 2.1 US gal

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