This is a genuine vintage Yamaha twin-cylinder engine block (cylinder jug), manufactured from a strong aluminum alloy housing with durable cast iron cylinder sleeves for Yamaha’s classic four-stroke OHC parallel-twin engines. Product Specifications - Brand: Yamaha OEM - Part Type: Cylinder Block / Cylinder Jug - Casting Mark: 1M000 - Material: Aluminum Alloy with Cast Iron Sleeves - Engine Type: 248cc, 4-Stroke, SOHC Parallel Twin - Features: Central cam-chain tunnel, cylinder head stud passages, and integrated oil feed channels Compatible Models & Years - Yamaha XS250 — 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984 - Yamaha XS250 Special — 1980, 1981, 1982 This block is based on Yamaha’s 1M0 / 1U5 engine platform. XS360 and XS400 models may share a similar crankcase layout, but the cylinder bore is specific to the 250cc version. Verify the engine serial prefix before purchase.
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Diesel used
Worldwide shipping available
Express shipping available at checkout
Estimated delivery: 2-5 business days
All items are carefully packaged for safe transit
Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
Contact support for return authorization
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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