Yamaha Genuine Passol II Cylinder 25K-11311-00
Yamaha Genuine Passol II Cylinder 25K-11311-00
Low stock: 1 left
Couldn't load pickup availability
Product Description
Brand new official Yamaha factory engine cylinder designed for classic vintage 50cc two-stroke micro-scooters. Precision-cast and machined to exact factory metallurgical tolerances with proper port timing angles, cylinder wall cross-hatch finish, and thermal dissipation fin configuration, engineered to restore factory compression, scavenging efficiency, and reliable power output during a complete top-end engine overhaul.
Vehicle Compatibility
Engineered explicitly for Yamaha classic air-cooled two-stroke micro-scooter platforms.
Verified catalog fitment layout:
| Make | Model Family | Engine Type / Displacement | Model Years |
| Yamaha | Passol II (SA50 / 25K series) | 50cc (Air-Cooled 2-Stroke Scooter JDM) | Early 1980s–1985 |
| Yamaha | Passol (Early Sols / 2E9 / 25K variants) | 50cc (Air-Cooled 2-Stroke Scooter JDM) | Early Era |
Fitment & Technical Details
Inspect the cylinder bore diameter, transfer port edges, and crankcase gasket mating surfaces for absolute cleanliness prior to installation. Ensure the crankcase mouth is completely free of old gasket residue and carbon buildup. Guide the cylinder carefully over the piston rings, ensuring proper ring end-gap positioning against the piston locating pins, then seat squarely down onto the crankcase stud bolts without forcing.Verification: Slides smoothly over the piston assembly down to the crankcase base with zero binding, providing an airtight seal for the combustion chamber and precise port alignment under high-rpm operating temperatures.
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.
