YX 140cc Engine ‘PRO’ Gen4 – (Manual) – Kit 1
This PRO GEN4 engine is a 140cc upgrade with a Z40 Camshaft, known for its long-term reliability and tough bottom end.
- The description claims the engine is built around a YX150-5-based bottom end with an oil filtration system.
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Good foundation, but some important product data is still missing.
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