CBR250RR MC22 YSS Rear Suspension "ME302" Official Sales Page
For CBR250RR MC22 (1990-2000) only
ガレージ湘南 限定販売モデル
"It's not just a part to run fast.
Sign when the rear suspension is worn out
・ During cornering, the car body becomes fluffy and the behavior becomes unstable.
・ The feeling of contact with the road surface is weak, and it swells due to cornering.
・ The bike bounces due to uneven road surface or deceleration zone, so you cannot run with confidence.
・ I feel that the car body is twisted at highway corners and highway seams.
・ Seat height drops too much when riding
・ Almost no effect can be felt even if the preload is adjusted.
For rear suspensions that have not been overhauled for years, the damage inside may be severe and OH may be difficult or the OH cost to restore the original performance may be high.
ダンパー（減衰装置）の劣化が主な原因です。サスペンションは新車時（新品）をピークに、ダンパーの中にあるオイルや、部品が劣化していきます。
一般的に、ストリートでの使用を前提とした場合、10,000kmから20,000km（または２年に１度）のオーバーホール or 交換が推奨されています。
（純正・社外品を問わず同じです）
もちろん使用環境によって個人差はありますが、何十年、何万キロも使うことを前提に設計されていないのです。
同じバイク、同じライダー、同じ環境でおこなった高負荷走行テスト。
走行距離が伸びるにつれて、オイルの汚れがひどくなり、オイル粘度が低下します。いわゆる水っぽい状態（シャバシャバな状態）になるわけです。
するとダンパー本来の役割が果たせなくなり、サスペンションが急激に伸び・縮みしたり、路面の凹凸を通過した際、バイクが跳ね続けて不安定になります。
これがダンパーが劣化した状態、リアサスがへたった状態です。
乗り心地が悪くなるだけではなく、バイクの運動性能（安全性）におおきく影響します。
リアサス交換前と交換後の比較
リアサス交換するメリット
When the rear suspension exchange
✓ Reduces the fluffy feeling when passing through uneven road surfaces such as pavement seams and deceleration zones.
✓ Vibration is reduced and the behavior of the bike is stable, so you will not get tired even if you drive a long distance.
✓ You can feel the ground contact of the rear tires and open the throttle with more peace of mind during cornering.
✓ You can run with peace of mind because the tension is effective even in high-speed corners.
✓ You will be able to run the line you aimed at in cornering, making it easier to run
✓ Smooth driving is possible, and you will not get tired even if you drive a long distance.
As a result of the stable behavior of the bike and the sense of security, you can drive safely and smoothly.
Main features of this product
✓ It is designed to be slightly firmer than the genuine MC22 rear suspension.
✓ Aluminum forged body that is 1.1 kg lighter and more rigid than the genuine product (shock weight 1.65 kg)
✓ The adjustment mechanism is preload (initial) adjustment only. By making it non-decomposable (OH not possible), we have reduced costs and made it possible to provide it at a reasonable price.
✓ Comes with a 2-year manufacturer's warranty from the date of purchase.
Spindle rod (damper rod)
The spindle rod, which requires abrasion resistance and smooth stroke, is made by heat-treating the highest quality high-tensile steel to achieve outstanding strength and durability.
The surface is polished and mirror-finished in micron units, and then hard chrome-plated to increase the surface hardness.
spring
Uses evenly spaced springs that do not change the rate during strokes and make it easy to adjust the settings.
Designed to achieve both light weight and long life, the high-precision springs produced under quality control that meets international standards continue to perform as specified even under harsh usage conditions.
The material is the finest silicon chrome steel. Corrosion resistance and long surface hardness have been achieved by powder coating, which is resistant to scratches and has excellent flexibility.
Spring preload
(Initial adjustment mechanism)
Stepless preload (initial) adjustment is possible by using the attached tool.
For those who wish, we will check the rider's weight and intended use at the time of ordering, and then preload and ship.
Those who don't know much about suspension can ride with confidence.
Ride for a while, and once you get used to it, you can adjust it yourself and enjoy the changes.
下から見た図（メーカー出荷時は６段階中、最弱になっています）
参考例：同じタイプのイニシャル調整機構
専用器具でスプリングをいったん取り外して、イニシャル調整しています。
イニシャル調整とは
スプリングにかけるテンションのこと。
あらかじめスプリングを縮めて、ダンパーのストローク位置を調整するために使用します。
公道を走行する場合、一般的にダンパーラバーに接触しない程度（底付きしない。20％ほど余裕を持たせる）が理想です。
※写真右側のゴムが、ダンパーラバー
World-class quality control and 2-year warranty
Obtained the international quality management standard QS9000 / ISO9002 from the International Organization for Standardization (ISO), which has its headquarters in Switzerland. YSS's high technology and thorough quality control were recognized.
In 2006, we obtained ISO / TS16949: 2002 certification from TÜV Rheinland in line with the integration of standards.
Using carefully selected raw materials for each of the components used, all are produced at our own factory by making full use of high-precision cutting equipment. The finished product undergoes thorough quality control using CP-controlled inspection equipment.
After the suspension is completed, it is shipped after being inspected by the person in charge and managed by serial number. It comes with a 2-year warranty.
タイ工場 サスペンション製造の様子 2022年
2023年4月に完成したYSS D.C（物流・カスタマーサービス）センター
世界トップクラスの技術と実績
ヘンリクス・エッセンス氏（右から３番目）
WPサスペンションの元エンジニアで、YSSの開発・研究責任者エッセンス氏（1980年からサスペンションを設計）を筆頭に、MotoGPワークスチーム経験者など、実績豊富なスペシャリストたち。
確かな技術水準は、国内外のさまざまなレース実績によって証明されています。
・スーパースポーツ300世界選手権（WSSP300）で４年連続シリーズチャンピオン獲得
上記以外にも、世界30カ国のライダーが参戦するスペイン スーパーバイク選手権（ESBK）、イタリアロードレース選手権（CIV）、オフロード選手権など、数々のタイトル・勝利を獲得。
2024年にはスーパースポーツ世界選手権（WSSP）で、MVアグスタのファクトリーチームや、イタリア名門チームのDUCATIにYSSサスペンションが採用されています。
Specifications
Rear suspension "ME302" for CBR250RR (MC22)
Shock overall length: 3,100 mm
Shock length (upper and lower mount width): 2,800 mm
Shock weight: 1.65kg
Effective stroke amount: 38mm
Free spring length: 150mm
Standard set length: 138 mm
Standard preload amount: 12 mm
Piston diameter: φ30mm
Spindle rod diameter: φ12mm
Spring inner diameter: 46 mm
Spring rate: 130N / mm
Estimated standard weight: 60kg-80kg
Accessory
・ Manufacturer's warranty
·User's manual
·tool
・ Two YSS special stickers
What is the assumed standard weight?
"It is the weight of the rider that the manufacturer assumed by design.
If the rider weighs much more than the standard weight , the springs must be replaced with harder ones or the original performance will not be achieved.
(The theory is the same for all suspensions, whether genuine or external.)
Spring replacement is not supported for this product due to high cost. note that.
"Don't exceed the standard weight even a little" It's not so severe, but if you are worried, please contact us before purchasing.
* Specifications and prices are subject to change without notice. please note that.
* Because it is an imported product, there may be some scratches or dents on the box. Please refrain from purchasing those who are nervous.
Garage Shonan Representative Masaatsu Hyuga Profile:
International A-class rider. While running a motorcycle shop, he participated in the Suzuka 8 Hours Endurance Road Race for 16 years. Participated in overseas races such as participation in the Macau GP, a public road race in India. He used to work at an OHLINS pro shop and has a deep knowledge of suspension tuning. In 2019, we released the rear suspension for CB125T, which was jointly developed with YSS. Since then, it has been developing and selling YSS products such as those for VT250 SPADA.
He is also the personality of FM Shonan Napasa and the representative director of the Chigakesen Project, an NPO that supports reconstruction after the Great East Japan Earthquake.
We are running a shop with two people, so we appreciate your understanding and cooperation.
Thank you.
Payment method
■ About the product price
You can choose either.
・ Credit card payment by PayPal
No fees. Credit card payment is possible online (personal information will not be transmitted to us)
You will receive a payment email from PayPal within 3 business days of placing your order (if you do not receive the email, please contact us)
·Bank transfer
Transfer destination: Shonan Shinkin Bank
The transfer fee will be borne by the customer.
* If payment is not received by the deadline, it may be canceled. please note that.
■ About shipping fee
We will only ship by cash on delivery. please note that.
■ About contact for product shipment
After confirming payment, we will ship the item. Since the business is busy, it is difficult to individually contact you for confirmation of payment and shipping of products.
If you contact us, we will respond, so if you are interested, sorry to trouble you.
Please contact us by phone or email.
If you have any questions, please contact us by phone or email.
* Please use the order form to place an order. We do not accept orders by phone or email.
