Yamaha Motor Co., Ltd. 59W-1131J-01-00 Cylinder Head Joint

The Yamaha 59W-1131J-01-00 Cylinder Head Joint is a heat-resistant sealing gasket (Joint #2) engineered to seal the cylinder head in Yamaha two-stroke engines, preventing combustion-gas leaks and maintaining cylinder pressure. It is commonly installed in Yamaha TZ250 motorcycles (1988–1989) and similar configurations, residing within the cylinder head's internal sealing structure to ensure precise alignment and durable sealing. As an OEM part, 59W-1131J-01-00 serves high-performance racing and engine-reliability applications where accurate sealing, thermal resistance, and engine efficiency are essential; viable replacements include 59W-1131J-00-00, 29L-1131J-00-00, and 66E-1131J-10-00. This item is a discontinued / OEM legacy part with limited availability.