Yamaha 5bs 661 Jun 2026

, with some comparing the sound to an "aircraft taking off". Maintenance:

: Officially recommended at 100:1, though many users run a 50:1 mix for added protection. Spark Plug : Standard NGK BP6HS with a gap of 0.6–0.7 mm. Gear Oil : SAE #90 hypoid gear oil. Pros & Cons yamaha 5bs 661