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Yahoo Bid Automotive Motorcycles Maintenance Equipment Filters Air Filters By Manufacturer Yamaha
RZ250 RZ350 吸入改善 エアクリーナー ファンネル ダクト 普及版 (4L3 4UO 4L0-14437-00 ダクト代替
 
        

  • Product Quantity
    : 1
  • Starting Bid
    :12,800円
  • Highest Bidder
    : / Rating:
  • Listing Date
    :2025年12月24日 19時11分
  • Bidding closes on
    :2025年12月28日 19時11分
  • Auction Number
    :p1193454066
  • Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
RZ250 RZ350 吸入改善 エアクリーナー ファンネル ダクト 普及版 4L0-14437-00 ダクト代替

※普及版は生産工程を見直し価格ダウンをしています。
 造形精度に甘さがあり、使用上問題ない程度ですが形状のバラつき等があります


オリジナル開発パーツ。開発~検証で約1年半を要しています。
4L0-14437-00 ダクトの代替品でもあり、吸入量を増大するために形状を工夫しています。
吸入口はいわゆるファンネル形状としています。
元々、エアクリーナー容量の拡大アタッチメントとセットで出していましたが、4L0-14437-00 ダクトの代替が欲しいという声にこたえて単品販売します。

※エアクリーナーボックス本体は付属しません。取り付けの参考です※
→白い樹脂パーツが本セットの構成部品です。
 本オクは写真2枚目のダクトだけです。エアクリーナー拡大アタッチメントも欲しい方は別途セットを出してます。
 メイン他の写真は初期量産型による取付参考です。

RZのエアクリーナーは豚鼻と呼ばれる 4L0-14437-00 ダクトが入っています。
諸説ありますが、これを取っ払ったり、ケースに穴をあけたりすることで高回転の伸びが良くなる云々…ということで、加工されてしまった個体も多いと思います。

しかし、これは少なくとも町乗りでは大間違いです。
中低速のトルクが落ちるので、高回転域が強調されて速くなったと勘違いするだけです。
現代のレーサーも、インダクションボックスは非常に凝っていますよね。
90年代あたりのレーサーもラム加給がなくてもインダクションボックスは装着されています。
直キャブ(今なら直スロットル?)や剥き出しのファンネルはまず見ません。

自然吸気エンジンは慣性加給の効果が重要です。
豚鼻を外したりクリーナーボックスに穴をあけることで慣性加給が弱まり、同時に吸気に乱流も起きやすくなる。
結果として高回転ではイイのかもしれませんが、低中速がダメになるのです。

このダクトが無くて困ってる方、またダクトは持っていても吸気の改善をしたい方はいらっしゃると思います。


ダクトは純正豚鼻と全長が同等、先端部分をファンネル構造として吸入効率をアップしています。
ダクトが外にせり出した分、吸気経路もエンジンが吸いやすいように調整されます。

取付は、純正豚鼻を取り外し、豚鼻取り付けのダボ穴を利用して、ネジ止めしてください。
当方ではM6の極低頭六角穴付きボルトと、薄型のUロックナットを使っています。脱落防止のためです。
適宜ワッシャーなどを組み合わせて隙間ができないように組んでください。

色は白です。塗りたい方は染めQ等の染料系塗料で色付けできると思いますが、あまりお勧めはしません。
ザラっとしてますが、このほうが流体を通すうえでは有利です。
(ポート研磨でピカピカにポリッシュするよりあえて梨地のほうがイイと言うのと同じ理由です)

細部形状、表面仕上げ、色味など予告なく変更される場合があります。

旧車向けカスタムパーツです。ノークレームノーリターンで。
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Product Price JPY
Japanese Consumption Tax(10%) JPY

A 10% consumption tax is applied to goods and services in Japan. The price may include the tax or it may be added separately. Please check the price details when ordering.

Note: This is a domestic sales tax applied within Japan.

Japan Local Shipping Fee JPY Japan Local Shipping Fee Reference
Product Weight KG The maximum weight limit is 30 kg
International Shipping Methods
Singapore Package Import: Customs and Tax Policies
Proxy bidding and purchasing services are becoming increasingly convenient. However, overseas shopping carries certain risks and issues. To reduce these risks and enhance shopping safety, please be sure to read the following information:

1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao-holdings.com and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: RZ250 RZ350 吸入改善 エアクリーナー ファンネル ダクト 普及版 (4L3 4UO 4L0-14437-00 ダクト代替
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao-holdings.com