 |
Chassis
Frame/chassis
Our development objectives for the frame and chassis include fusing flexibility with a rigid feel at a high level through mass centralization and satisfying the sporty feel a rider gets the moment they mount the bike. Development also aimed to provide a basic riding performance that covers body size, dimensions, driving stability, and riding position; these factors were optimized for riders of all kinds from beginners to experienced riders so that they can feel the fun of maneuvering -a fundamental element of motorcycle riding. A rider should be able to use the bike casually in everyday life, go touring at times, and enjoy a sporty ride at other times.
More specific objectives included the following:
* A frame that will realize agile handling and steady maneuverability characteristics as a 250cc full-cowl sport model
* A sporty riding position that takes into account a level of comfort and ease of handling that will satisfy customers around the world
* A secure suspension capable of supporting the ride that the rider wants and maximizing bike performance
* The first introduction in its class of Combined ABS, which provides customers with a sense of security
Riding position
The riding position takes into account the body size and shape of customers from a global standpoint to broaden the range of riders to include people of small and large stature, so that as many people as possible can fully enjoy the bike. Furthermore, a sporty riding position that is stress-free and makes it easier to handle the bike was realized by considering how people use bikes in various countries, including touring from a congested urban area over highways to suburban areas and taking a sports ride on a winding road. The seat has realized an easy reach to the ground that provides a sense of security through optimization of its hardness and shape. By not hindering the movement of the rider or passenger, the functional shape allows them to enjoy even a long ride in comfort and ease.
Frame dimensions and parts placement
With the CBR250R, we aimed at straightforward handling that is agile and yet provides a sense of security. Toward that end, agility and high turning performance were obtained by employing a newly developed compact engine, shortening the wheelbase, and optimizing the front-rear weight distribution while concentrating heavy components at the vehicle's center of gravity. At the same time, weight reduction, straightforward handling with a sense of security, and reduced vehicle vibration were achieved by optimizing the position of the engine mount and the frame rigidity balance.
Rear suspension
Adopting a Pro-link suspension allows a light and more compact rear suspension to be realized. This suspension demonstrates progressive characteristics (increases/decreases occur gradually) and high road tractability through ratio optimization.
This Pro-Link suspension makes the ride more stable by moderating damping force characteristics for a softer ride during short travel and by boosting the damping force characteristics for sure damping with a long stroke length during extended travel.
In this way, the suspension features damping force characteristics that change progressively, and having a compact suspension layout near the center of gravity contributes greatly to improved driving stability.
In addition, the five-position preload adjuster can be adjusted to respond to the rider's preferences, riding in tandem, and other demands. Proper toughness along with high rigidity has been achieved through a 574mm rear swing arm and 60 × 30mm pipes with square sections. Because the plastic inner fender also serves as the chain case, high design quality and weight reduction were achieved while reducing splashes of mud and chipping on the vehicle body, rear cushion and ABS modulator.
Brakes
The brake design takes into account all types of roads and riding environments in the world. A more powerful braking force is secured by installing a front brake consisting of a two-pot floating caliper attached to a floating disc with large 296mm diameter and a rear brake consisting of a large diameter, one-pot caliper attached to a 220mm diameter disc. A newly-developed resin-molded brake pad with the same effectiveness as a sintered pad has been introduced to realize a brake system that makes the rider feel secure whenever they use it during an urban ride, long-distance touring, or a sports ride. In addition, for the first time in the world as a 250cc motorcycle, specifications have been set to incorporate Combined ABS, which combines a front/rear wheel interlocking brake system with an anti-lock brake system (ABS). This Combined ABS is a Honda-original brake system in which the front/rear wheel interlocking brake generates a braking force ideally distributed between front and rear wheels, and high deceleration is obtained when the foot brake is applied, but this system assumes a sports ride when the hand brake is applied (on the front wheel), thus allowing the front brake to function independently. Furthermore, the anti-lock brake system limits unexpected vehicle body movements due to wheel lock and releases riders from excessive tension even during sudden braking or under slippery road surface conditions such as rain. Thus, surer braking force can be secured with normal operation.
The combined ABS model is equipped with a three-pot caliper in front, front/rear wheel speed sensors that detect the condition of the vehicle, and an ABS modulator with a built-in ECU. The ECU processes information from wheel speed sensors and controls the feed of hydraulic pressure to the caliper. Advanced braking performance was achieved in step with maneuverability by placing heavy items such as ABS modulator near the center of gravity of vehicle body.
| จากคุณ |
:
malldeff  
|
| เขียนเมื่อ |
:
27 ต.ค. 53 22:54:26
|
|
|
|
|
Honda CBR250R Specifications
เข้ามาดู ...
มาม่าgruอยู่ไหน