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- Compatible with Honda CRF150 CRF250 CRF450; fits standard motorcycle radiator filler necks and maintains stable pressure to help reduce boil-over on demanding rides. - 1.6 kgf high-pressure rating raises the coolant boiling point for consistent performance on off-road trails, track days, slow climbs, stop-and-go sections, and warm weather. - Metal alloy body with spring-loaded design and reinforced seal; corrosion-resistant and allows tool-free hand installation and removal on common radiator necks. - Suitable for outdoor riding and workshop use, including home garage maintenance, trailside fixes, practice sessions, desert and forest rides, and commuter prep. - Easy replacement: swap directly with the existing cap; after installation, check coolant level and bleed trapped air if needed; compact size stores in a tool pouch as a spare.