Yamaha Genuine DT125 Oil Tank Cap 2N3-21771-01
Yamaha Genuine DT125 Oil Tank Cap 2N3-21771-01
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Product Description
Yamaha Genuine factory 2-stroke oil injection reservoir filler cap (BODY, CAP). Precision-molded black rubber/plastic push-fit cap engineered specifically for Yamaha Autolube oil tanks (2N3 model prefix). Designed with factory venting and internal sealing lips to prevent 2-stroke injection oil leaks while allowing proper tank venting during oil feed operation. Manufactured in Japan under strict Yamaha OEM specifications.
Vehicle Compatibility
Verified fitment for classic Yamaha 2-stroke dual-sport, trail, and utility platforms:
| Make | Model | Chassis / Engine Variant | Model Years |
| Yamaha | DT125 / DT125MX | 123cc 2-Stroke Single (2T5 / 3Y6 / 2N3 Series) | 1978–1983 |
| Yamaha | DT175 / DT175MX | 171cc 2-Stroke Single (2K4 / 3Y6 Series) | 1978–1983 |
| Yamaha | DT100 | 97cc 2-Stroke Single (2F1 / 3X2 Series) | 1978–1983 |
| Yamaha | DT250 / DT400 | 249cc / 397cc 2-Stroke Single (1M1 / 1X4 Series) | 1977–1979 |
| Yamaha | MX100 / MX175 | 97cc / 171cc 2-Stroke Trail Single | 1979–1981 |
Fitment & Technical Details
Direct factory OEM replacement oil tank filler cap. Press firmly onto the 2-stroke Autolube oil tank filler neck until fully seated. Ensure the breather passage inside the cap remains free of dirt or debris to allow smooth oil gravity feed to the injection pump.
Important: Please ensure the part number matches your motorbike before purchasing. If you have any questions about the part or its compatibility, feel free to contact us. We’re here to help!
At Dmmotorcycles, we’ve specialized in vintage and vintage sports motorcycles and parts directly from Japan since 1998. We stock a wide selection of rare genuine and high-quality aftermarket parts and continually update our inventory to meet growing demand.
Looking for a specific part? Don’t hesitate to ask! We may have it in stock even if it’s not listed online. If not, we’ll do our best to source it for you.
We’re also happy to provide guidance on installation and offer excellent after-sales support to ensure your satisfaction.
Shipping Information
We ship worldwide, carefully inspecting and securely packing all parts to ensure safe delivery. Your order will be insured and shipped quickly, with the best available shipping option chosen for speed and reliability.
Please note:
- All parts are shipped from Cyprus (Europe).
- Customers outside the EU may incur additional import taxes based on the value of the item.
How we handle your order in 4 steps
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1. Order Verification
We confirm the order and make sure the correct part number, quantity, and any special requests match what’s on the sales confirmation
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2. Quality Check
Since our parts are new old stock we Inspect the parts for any defects, scratches, or missing components to ensure it meets quality standards. otherwise will notify you before proceeding with the order.
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3. Safe and Secure packaging
- Protective Wrapping: We use bubble wrap or foam padding to wrap the part, focusing on sharp edges or delicate components.
- Boxing: We place the wrapped part inside a sturdy box, filling gaps with packing materials to prevent movement.
- Sealing and Labeling: Securely tape the box and attach the shipping label, including orientation-specific markers like "Fragile."
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4. Finalizing of Shipment
We confirm the shipping address and contact details, give the package to the Post, keep the tracking number, and then send it to the customer along with the shipment notification.
