Honda Releases Sporty New Dio Z4 50cc Scooter
March 20, 2002, Japan
Tokyo, March 20, 2002-Honda Motor Co., Ltd. today introduced the sporty, stylish Dio Z4, a new addition to the environment-friendly Dio lineup of water-cooled, 4-stroke 50cc scooters. The Dio Z4 goes on sale Thursday, March 21, 2002.
The 4-stroke Dio series, released in March 2001, was developed around the keywords "Clean", "Economical", "Silent", and "Tough". These scooters have won a broad following not only for their environmental performance, but also for their comfortable ride and fuel economy.
This latest scooter in the series adopts a sporty exterior design built on the Dio base. The new large rear spoiler incorporates a built-in red LED high-mount brake light, for a sharply styled rear view. The headlight employs a blue multi-reflector that imparts a racy feel.
Lightweight aluminum-cast wheels front and rear are paired with a front disc brake to deliver sporty handling and nimble response.
Two body colors are available: intrepid Clear Silver Metallic and eye-catching Clipper Yellow.
Dio Z4
- Yearly domestic sales target:8,000 units
- Manufacturer’s suggested retail price (excl. consumption tax):189,000 yen
(Example of regionally adjusted manufacturer's suggested retail price: Okinawa +5,000 yen. The manufacturer's suggested retail price is for reference only. Similar adjustments may be made in other regions.)
＝Distinctive Features＝
- A water-cooled, 4-stroke engine delivers superb environmental performance
Dio’s efficient, clean-burning engine emits only half the carbon monoxide (CO) and hydrocarbons (HC) allowed under government regulations*1, while attaining superb fuel economy of 75.0km/L*2. It also delivers high durability and low running and startup noise.
*1 Honda in-house testing
*2 Test value for low-altitude operation at 30km/h - Sporty styling with a racy feel
The Dio Z4’s exterior design is loaded with sporty styling from tip to tail. The headlight employs a blue vapor-deposit aluminum coating inside the multi-reflector, for superb illumination and a racy look. The large rear spoiler incorporates a built-in red LED high-mount brake light, with a sharp, upswept design for the brake and turn signal lights. The “4” of the Z4’s 3-dimensional emblem is highlighted in red, for a further touch of presence and flair. - High-performance wheels and brakes
A front disc brake and lightweight aluminum-cast wheels front and rear deliver sporty handling and nimble response. - A high-security anti-theft system
For added security, the Z4 provides single-key operation for the main switch, seat opener, and reinforced handle-lock system, all from the main key cylinder. The main key cylinder also features a key shutter. Honda’s original “Lock In” center-stand locking system, an antihotwiring circuit, and locking fuel cap further improve vehicle security, for solid anti-theft protection. - Other main features
・Combi-braking system that simultaneously activates both front and rear brakes for enhanced stability while braking
・An extra-large 22L* storage space with plenty of room for a full-face helmet or A4-size files
・Gold-colored wheels for an elegant, stylish look
*Honda in-house measurement
＝Body colors＝
- Clear Silver Metallic
- Clipper Yellow
Where the name "Dio Z4" comes from:
The Z4 name combines the "ZX" of the Dio ZX-a sporty scooter released in 1992 that is popular among young people-with the "4" of the 4-stroke engine employed in the Dio series, positioning the Z4 as the sporty model in the Dio series.
Specifications
| Vehicle Name | Dio Z4 | |
| Vehicle Type | Honda BA-AF57 | |
| Length x Width x Height | (m) | 1.710×0.620×1.010 |
| Wheelbase | (m) | 1.190 |
| Ground Clearance | (m) | 0.115 |
| Seat Height | (m) | 0.710 |
| Curb Weight | (kg) | 77 |
| Dry Weight | (kg) | 72 |
| No. of Riders | 1.8 | |
| Turning Radius | (m) | 2.8 |
| Engine Type | AF55E(water-cooled, 4-stroke OHC one-cylinder) | |
| Engine Displacement | (cm3) | 49 |
| Bore x Stroke | (mm) | 38.0×44.0 |
| Compression Ratio | 12.0 | |
| Maximum Power | (kW[PS]/rpm) | 3.7[5.0]/8,000 |
| Maximum Torque | (N·m[kg·m]/rpm) | 4.6[0.47]/7,000 |
| Fuel Consumption | (km/L) | 75.0 (30km/h constant speed, low altitude) |
| Carburetor Type | NVK00A | |
| Starter | Cell-type (with back-up kick start) | |
| Ignition | CDI, battery-powered | |
| Lubrication | Force-fed and splash | |
| Oil Capacity L | 0.7 | |
| Fuel Capacity L | 5.0 | |
| Clutch | Dry, multi-plate shoe-type | |
| Gear Ratio | 1st Gear | 2.800 ~ 0.860 |
| Caster Angle (degrees)/Trail (mm) | 26°30´/72 | |
| Tire Size | Front | 90/90-10 50J |
| Rear | 90/90-10 50J | |
| Braking System | Front | Hydraulic disc |
| Rear | Mechanical, leading/trailing drum-type | |
| Suspension | Front | Telescopic-type |
| Rear | Unit swing-type | |
| Frame Construction | Underbone (aluminum frame) | |