Beta RR 4 Stroke 450: history, specs, pictures

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Beta RR 4 Stroke 450
Production 2005
Class Enduro
1 Cylinder 4 Stroke
Bore / Stroke 88.9mm x 88.9mm
Compression ratio 11:1
Fuel System Carburetor, Keihin FCR-MX 39
Transmission Gear box: Gear

Final Drive: Chain

Clutch: Wet Clutch
Suspension Front: Hydraulic Fork - Ø 45 Mm. - Stroke 290 Mm.
Rear: Hydraulic Mono Shock Absorber - Wheel Str. 300 Mm.
Brakes Front: Floating Disc Ø 255 Mm.
Rear: Disc Ø 240 Mm.
Front Tire 90/90x21
Rear Tire 140/80x18
Wheelbase 59.02 inches (1499 mm)
Length 89.41 inches (2271 mm)
Width 32.01 inches (813 mm)
Seat Height 37.01 inches (940 mm)
Weight 117.0 kg (wet)
Manuals Service Manual

The Beta RR 4 Stroke 450 was a 1 Cylinder 4 Stroke Enduro motorcycle produced by Beta in 2005.


A 88.9mm bore x 88.9mm stroke result in a displacement of just 448.0 cubic centimeters.


The bike has a Gear transmission. Power was moderated via the Wet Clutch.


It came with a 90/90x21 front tire and a 140/80x18 rear tire. Stopping was achieved via Floating Disc Ø 255 Mm. in the front and a Disc Ø 240 Mm. in the rear. The front suspension was a Hydraulic Fork - Ø 45 Mm. - Stroke 290 Mm. while the rear was equipped with a Hydraulic Mono Shock Absorber - Wheel Str. 300 Mm.. The wheelbase was 59.02 inches (1499 mm) long.

2005 Beta RR 4 Stroke 450[edit]

The RR 4 Stroke 450 is a motorcycle in the Beta 4 stroke range, the middle brother of the 250 and 525 versions. It has a single cylinder, 4-stroke, liquid-cooled with countershaft and electric starting engine, a ground clearance of 320 mm and a wheelbase of 1490 mm. It is quite a handful, because of its big engine and low weight, only 117 kg.