Yamaha ST225 Bronco: review, history, specs

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Yamaha-st-225-bronco-2-1998-1998-2.jpg
Yamaha ST 225 BRONCO
Manufacturer
Production 1998
Class Classic
Engine
Four stroke, single cylinder, SOHC, air cooled
Bore / Stroke 71.1mm x 71.1mm
Compression ratio 9.5:1
Horsepower 19.98 HP (14.9 KW) @ 8000RPM
Torque 10.33 ft/lbs (14.0 Nm) @ 7000RPM
Transmission Gear box: 6-Speed

Final Drive: Chain

Clutch: Wet, multiplate
Suspension Front: Telescopic fork, 226 mm wheel travel
Rear: Swingarm rebound adjustable. single shock, 145mm.wheel travel
Brakes Front: Single disc 220 mm
Rear: Drum 110 mm
Front Tire 2.75-19
Rear Tire 120/80-18
Length 79.88 inches (2029 mm)
Width 31.5 inches (800 mm)
Seat Height 31.3 inches (795 mm)
Weight 130.0 kg (wet)
Recommended Oil Yamalube 10w-40
Related Yamaha_XT225_(Serow)
Manuals File:Yamaha XT225 1995 Service Manual.pdf
More Manuals


The Yamaha ST 225 BRONCO was a Four stroke, single cylinder, SOHC, air cooled Classic motorcycle produced by Yamaha in 1998. Max torque was 10.33 ft/lbs (14.0 Nm) @ 7000 RPM. Claimed horsepower was 19.98 HP (14.9 KW) @ 8000 RPM.

Engine[edit]

A 71.1mm bore x 71.1mm stroke result in a displacement of just 225.0 cubic centimeters.

Drive[edit]

The bike has a 6-Speed transmission. Power was moderated via the Wet, multiplate.

Chassis[edit]

It came with a 2.75-19 front tire and a 120/80-18 rear tire. Stopping was achieved via Single disc 220 mm in the front and a Drum 110 mm in the rear. The front suspension was a Telescopic fork, 226 mm wheel travel while the rear was equipped with a Swingarm rebound adjustable. single shock, 145mm.wheel travel.

1998 Yamaha ST 225 BRONCO[edit]

This scrambler model was designed with a good amount of the retro styling that was popular in the Japanese motorcycle industry at the time. Taking the frame and engine of the SEROW225 as its base, the fut rear fenders and other parts were made of chromed metal for a look of quality and a design similar to the rounded image of the 1968 DT-1 model. Its appeal included its easy-to-use performance and ride that on-road and off-road uses, and attractive exterior styling.



Models
Yamaha ST225 Bronco

(Japan)

1997

Color: LIGHT GRAY METALLIC 3

Yamaha ST225 Bronco

(Japan)

1997

Color: LIGHT REDDISH YELLOW SOLID 1

Yamaha ST225 Bronco
Yamaha ST225 Bronco

History[edit]

History
Year Country Name / Frame / Engine
1997 Japan Name: Yamaha ST225 Bronco

Code: 5BT1

Specifications[edit]

Yamaha ST225 Bronco: specs.

Specifications
DIMENSIONS Overall length 2030 mm / 79,9 in
Overall width 800 mm / 31,5 in
Overall height 1140 mm / 44,9 in
Seat height 795 mm / 31,3 in
Wheelbase 1320 mm / 51,9 in
Ground clearance 255 mm / 10,0 in
Dry weight
Curb (wet) weight 123 kg / 271 lbs
FRAME Type Double cradle (steel)
Front suspension, travel Telescopic fork
Rear suspension, travel Swingarm with mono-shock
Front tire size 2.75-19 43P
Rear tire size 120/80-18 62P
Front brake Single disc, 220 mm, 2-piston caliper
Rear brake Drum
Fuel capacity 8,3 l / 2,19 US gal
Trail 134 mm / 5,3 in
Fuel economy 1,85 l / 100 km (60 km/h)
ENGINE Type Air-cooled 4-stroke
Cylinder arrangement Single cylinder
Bore & Stroke 70,0 x 58,0 mm
Displacement 223 cm³ (13,6 cu in)
Compression ratio 9.5:1
Valve train Chain driven SOHC, 2 valves
Max. power 20,0 hp (14,7 kW) / 8000 rpm
Max. torque 18,6 Nm (1,9 kg-m) / 7000 rpm
0 to 100 km/h
Top speed 120 kmh / 74 mph
CARBURETION SYSTEM Type Carburetor, 1x Mikuni BST34
ID
DRIVE TRAIN Clutch Wet, multi-plate
Transmission 6-speed
Final drive Chain
Primary reduction 3.318
Final reduction
Gear ratio

I

II

III

IV

V

VI


2.923

1.888

1.428

1.125

0.925

0.793

ELECTRICAL Ignition CDI
Alternator A.C. magneto
Battery capacity 12V-7Ah

Images[edit]

Yamaha ST225 Bronco: images, gallery.

Yamaha ST225 Bronco
Yamaha ST225 Bronco
Yamaha ST225 Bronco
Yamaha ST225 Bronco

Videos[edit]

Yamaha ST225 Bronco: video.

BRONCO YAMAHA