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Yamaha Genuine YL2 / YG1 Oil Pump 34T Drive Gear 126-13178-00
Yamaha Genuine YL2 / YG1 Oil Pump 34T Drive Gear 126-13178-00
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Product Description
Factory-original 34-tooth molded nylon/plastic drive gear (Gear, Drive). Mounts onto the oil pump drive assembly shaft to transmit mechanical rotation from the crankshaft gear to the Autolube 2-stroke oil injection pump across 1960s and 1970s vintage small-displacement Yamaha street and utility models.
Vehicle Compatibility
Standard factory replacement fitment across vintage 50cc–100cc 2-stroke Yamaha platforms:
| Make | Model | Chassis / Engine Variant | Model Years | Application |
| Yamaha | YL2 / YL2C / YLCM Trailmaster | 126 / YL2 (100cc 2T AC) | 1967–1969 | Autolube Oil Pump Drive Gear |
| Yamaha | YG1 / YG1T / YG1K | 122 / YG1 (80cc 2T AC) | 1963–1966 | Autolube Oil Pump Drive Gear |
| Yamaha | YGS1 / YGS1T Trailmaster | YGS1 (80cc 2T AC) | 1965–1969 | Autolube Oil Pump Drive Gear |
| Yamaha | YJ2 / YJ2S Campus / Hop-Town | YJ2 (60cc 2T AC) | 1968–1970 | Autolube Oil Pump Drive Gear |
| Yamaha | U5 / U5E / U7 / U7E Mate | U5 / U7 (50cc / 70cc 2T AC) | 1965–1972 | Autolube Oil Pump Drive Gear |
Fitment Details
Installs directly onto the Autolube pump shaft retaining collar inside the outer engine crankcase cover. Inspect gear teeth for rounding, stress cracks, or stripping due to aged oil buildup before assembly to ensure uninterrupted 2-stroke oil metering.
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.