Honda CRF50F, CRF70F, CRF100F 2003-2012

Specs Comparison of Honda CRF50F (AE03) vs CRF70F (DE02) vs CRF100F (HE03) Model Year 2003 | Trials / Motorcross Features, Off-road Bike Photos

Released on Saturday, September 13th 2003, Honda CRF is a trial motorcycle series equipped with an air-cooled, 4-stroke, single-cylinder engine that is tenacious and easy to handle and demonstrates excellent off-road performance.

2004 model Honda CRF50F (AE03) photo.
Appeared as a minor change version of XR50R. Off-road introductory bike for children.

This time, with the minor model change of XR50R/XR70R/XR100R, the strength of the frame and the setting of the suspension have been changed to improve the steering stability. In addition, the exterior design will be changed to the styling of the CRF series, and the names will be "CRF50F", "CRF70F", and "CRF100F". The CRF series features an easy-to-handle 4-stroke engine, a compact body size that is easy to handle, and a wide variety of three models, making it an entry-level motorcycle that everyone from children to adults can easily enjoy off-road riding.

Common body color to CRF50F, CRF70F, CRF100F is extreme red

2003 CRF50F vehicle profile

The Honda CRF50F is an off-road play bike for kids, was introduced in September 2003 as the 2004 model. However, it was not a brand-new model, and was given the same series name as the motocross racer at the time of release, taking advantage of the minor changes of the XR50R. As an off-road bike for kids, it was a model following the QR50 released in 1982, the Z50R from 1992, and the XR50R from 1999. Equipped with an air-cooled 4-stroke 50cc engine, the transmission adopts a 3-speed transmission with an automatic centrifugal clutch that does not require clutch operation + bottom neutral. The rear suspension is a cantilever swing arm. * Models that cannot be driven on public roads.

2003 Honda CRF Pricelist

Planned sales volume (domestic/annual) of CRF50F, CRF70F, CRF100F Total : 500 units.

Manufacturer's suggested retail price at that time (2003):

• CRF50F : ¥149,000
• CRF70F : ¥159,000
• CRF100F : 229,000 yen

(Regional suggested retail price: excluding Okinawa and some areas.) (Reference price. Excludes consumption tax.)

• This CRF series cannot be driven on public roads or places used for general traffic.
  Also, you cannot get a license plate by registering.
• The above CRF series employs a blow-by gas reduction system to help protect the environment.
• The CRF50F is designed for people weighing 40kg or less, and the CRF70F is designed for people weighing 60kg or less.

Main Features of CRF50F, CRF70F, and CRF100F

2003 Honda CRF50F Features

• Renewed with sharp and fearless styling that draws on the flow of the CRF series.
• Equipped with an air-cooled 4-stroke 49.4cm3 engine that is tenacious and easy to handle.
• Uses an automatic centrifugal clutch bottom neutral type 3-speed transmission that does not require clutch operation and is easy to operate.
• In order to improve the sense of security, the front suspension adopts a newly designed fork protector and the rear suspension adopts a cantilever type.
• Changed to a reinforced frame body for racing users.
• Environmentally friendly blow-by gas reduction system.
• Equipped with a throttle limiter that regulates the opening of the throttle to improve the sense of security. This throttle limiter can be adjusted arbitrarily.
• Using front and rear 10-inch nobby tires suitable for off-road driving.

2003 Honda CRF70F Features

• Renewed with sharp and fearless styling that draws on the flow of the CRF series.
• Equipped with an air-cooled 4-stroke 71.8cm3 engine with quiet and smooth output characteristics.
• Uses an automatic centrifugal clutch bottom neutral type 3-speed transmission that does not require clutch operation and is easy to operate.
• In order to improve durability, the front suspension adopts a newly designed telescopic type, and the rear suspension adopts a cantilever type.
• Reinforced frame body and swing arm for racing users.
• Environmentally friendly blow-by gas reduction system.
• Nobby tires with 14-inch front wheels and 12-inch rear wheels are used for off-road driving.

2003 Honda CRF100F Features

Picture of Honda CRF100F (HE03) Model Year 2006.

• Renewed with sharp and fearless styling that draws on the flow of the CRF series.
• Equipped with an air-cooled 4-stroke 99.2cm3 engine with powerful output characteristics.
• Uses a 5-speed manual transmission that allows you to enjoy sporty driving.
• In order to improve road-following performance, the front suspension adopts a newly designed telescopic type with a cushion stroke of 150mm, and the rear suspension uses a pro-link with an axle travel of 148mm.
• Using a lightweight and highly rigid diamond frame and swingarm.
• Environmentally friendly blow-by gas reduction system.
• Nobby tires with 19-inch front wheels and 16-inch rear wheels are used for off-road driving.

2003 Honda CRF Main Specifications

Common Name		CRF50F	CRF70F	CRF100F
Car name/model		Honda AE03	Honda DE02	Honda HE03
Length×Width×Height (m)		1.302×0.581×0.774	1.569×0.694×0.885	1.853×0.786×1.046
Wheel Distance (m)		0.911	1.063	1.249
Minimum ground clearance (m)		0.146	0.178	0.252
Seat height (m)		0.550	0.655	0.775
Dry weight (kg)		47.0	58.0	73.0
Capacity (persons)		1
Engine type		Air-cooled 4-stroke OHC single cylinder
Total Displacement (cm3 )		49.4	71.8	99.2
Inner Diameter x Stroke (mm)		39.0×41.4	47.0×41.4	53.0× 45.0
Compression Ratio		10.0	9.0	9.4
Max output (kW[PS]/rpm)		2.2[3.1]/8,500	3.6 [4.9]/8,000	7.3[9.8]/9,000
Maximum torque (N・m[kg・m]/rpm)		3.3[0.34]/4,000	5.0[0.51]/3,500	7.9[0.81]/7,000
Carburetor type		PA42	PB13	PD22
Starting method		Kick method		Primary kick method
Ignition method		CDI magnet ignition
Lubrication method		Combined pumping and splashing method
Fuel tank capacity (L)		3.0	5.5
Clutch type		Automatic centrifugal type		Wet multi-plate coil spring type
Transmission type		Constant mesh 3-speed return		Constant mesh 5-speed return
Transmission ratio	1 speed	3.272		3.083
	2 speed	1.667		1.882
	3 speed	1.190		1.400
	4speed	－		1.130
	5 speed	－		0.923
Reduction ratio (primary/secondary)		4.058/2.642	3.722/2.400	4.437/3.571
Caster angle (degrees)		25°00´	26°10´	28 °50´
Trail amount (mm)		32.0	62.0	99.0
Tire size	Front	2.50-10	2.50-14 4PR	2.50-19 4PR
	Rear	2.50-10	3.00-12 4PR	3.00-16 4PR
Brake type	Front	Mechanical leading trading
	Rear	Mechanical Reading Trading
Suspension method	Front	Telescopic type Cushion stroke 96mm	Telescopic type Cushion stroke 100 mm	Telescopic type Cushion stroke 150 mm
	Rear	Cantilever Axle travel 70mm	Cantilever Axle travel 90mm	Swing arm type (pro-link) Axle travel 148mm
Frame format		Backbone		Diamond