Yamaha built the engine for performance; the valve angle was a relatively vast 50 degrees, which at the time was believed for being perfect for significant energy production.[twenty five] Nowadays, many modern superior-revving engines have lowered the valve angle to twenty to twenty five degrees, allowing for for a more https://blacktop-4age03567.blogoxo.com/34824778/the-greatest-guide-to-4age-20v