ZTMoto Wraith 85 Engine Bottom End Only (No cylinder/head)

Build your engine your way with the ZTMOTO Phantom 85 Wraith Bottom End Engine, a high-performance foundation designed for serious motorized bicycle builds. This complete bottom end includes the full 85cc engine assembly—excluding the cylinder and head—giving you the flexibility to customize your top end while retaining the proven performance of the Phantom 85 Wraith platform.

Engineered for strength, efficiency, and reliability, this bottom end features a balanced crankshaft, long rod design, and precision-machined components to support smooth operation and consistent power delivery. With upgraded materials and performance-driven specifications, it’s built to handle demanding riding conditions while maintaining durability over time.

Whether you're upgrading, customizing, or building from the ground up, this bottom end delivers the quality and performance expected from the ZTMOTO Phantom 85 Wraith.

• 85cc displacement (52mm bore x 40mm stroke)
• Long rod design (89mm)
• Balanced crank for smoother operation
• Large intake port (40mm bolt hole width) for increased airflow
• Oversized round exhaust port (28mm diameter) for maximum airflow
• High-end stainless steel Allen bolts for durability
• Includes needle bearing for piston wrist pin
• Approximate dimensions: 9" x 9" x 5"