YAMAHA YZ250FX ข้อมูลจำเพาะ

1) A new engine common to the "YZ250F" newly equipped with a new cylinder head has been matched with the new cylinder head "Improvement of intake and exhaust efficiency, intake air flow rate increase" and focusing on performance.Optimized inlet shape and port shape from air cleaner to introduce fresh air more closely to downdraft.The cam profile has also been changed, coupled with the effects of reinforced valve springs, etc., it supports excellent output characteristics. 2) Aluminum forged piston of aged two ring Two-ring piston with light weight and loss reduction effect has been changed to the current FX ratio, addition of piston pin weight reduction and DLC treatment addition , Improved the basic performance by changing piston cooler shape and so on. 3) Exhaust pipe aiming at increasing pipe diameter The original exhaust pipe that balances mass concentration and exhaust efficiency has reexamined the balance of intake and exhaust, expanded the pipe diameter, and expanded the degree of bending.It draws out a good exhaust pulsation effect and contributes to the improvement of the performance. 4) Aluminum frame with FX exclusive tuning The semi-double cradle frame is also common with "YZ250F" in 2017.The bracket rear arm part is thicker than the current FX, and it has excellent strength and rigidity.The suspension bracket tunes the shape and supports high maneuverability in the enduro. 5) Suspension before and after FX exclusive setting YZ Direct front suspension has dedicated setting while changing durability by changing oil seal specifications.The rear shock unit also has FX exclusive setting. 6) Other changes Added shot peening to FX development ECU, mission, φ270 heat resistant steel front brake disc