Dual vacuum fuel supply switch, compatible with the vacuum diaphragm valve of the carburetor of the Yamaha PW50 off-road motorcycle (1981-2009).

Product description from Amazon France: Key advantages: Precise compatibility with models and years: This product was specifically designed for Yamaha PW50 off-road motorcycles from model years 1981 to 2009 and guarantees perfect compatibility with the original vacuum system, fuel supply, and mounting connections. Automatic vacuum operation: Thanks to the vacuum diaphragm, this device requires no manual intervention. The intake vacuum generated when starting the engine automatically opens the fuel supply valve; when the engine is switched off, the valve closes automatically to prevent fuel from overflowing into the carburetor, thus improving safety and ease of use. Economical twin set: Each set contains two identical pressure switches – one for immediate replacement of worn parts and the other as a spare. Ideal for teams or clubs with multiple PW50s or as a spare part for regular maintenance. Solution to common problems: This pressure switch directly replaces the original (OEM) pressure switches, which can cause oil leaks, insufficient fuel supply, or starting problems after the engine is switched off due to aging or diaphragm breakage.