Yamaha Yz 250f 60th Anniv motorcycles for sale

2015 Polaris Sportsman 570 SP

$7,690

Wake Forest, North Carolina

2016 YAMAHA YZ 250F 60TH ANNIV, Aside from its retro-sexy 60th Anniversary Limited Edition yellow and black photostrobe bodywork and graphics, there is no outwardly visible difference between the 2016 YZ250F and the 2015 model it replaces. Its bilateral beam aluminum chassis is the same. The body panel shapes are the same. Its rearward-inclined engine and mass-centralizing wraparound exhaust system all look the same.The YZ250F’s 249cc, DOHC Single features some key internal changes, including a new piston, new heat treating for the connecting rod and new thrust washers on the big end to increase rigidity and reduce engine vibration. The engine’s balance factor has also been changed to help the YZ drive out of corners better.The YZ250F’s 249cc, DOHC Single features some key internal changes, including a new piston, new heat treating for the connecting rod and new thrust washers on the big end to increase rigidity and reduce engine vibration. The engine’s balance factor has also been changed to help the YZ drive out of corners better.But delve inside the 2016 YZ250F’s 249cc liquid-cooled, DOHC four-stroke Single, and things are not the same. For the second straight year, Yamaha has redesigned the YZ250F’s piston. This one features a flatter crown to affect a change in the combustion chamber velocity, and it does away with the sharp edges of the old one, for more efficient filling and scavenging of the mixture. Despite the flatter top, the new piston still maintains the same 13.5:1 compression ratio as the old piston, but look underneath and you will see that its F1-style bridged-box design is completely different, contributing to a 7% weight reduction even while incorporating lateral ribs added to both sides of the wrist pin for greater rigidity. Combining that savings with a lighter piston pin, Yamaha shaved just over 18 grams of top-end weight from the engine. Any high-performance engine builder worth his or her salt will confirm that less top-end weight is always preferable for easier power production and greater reliability at stratospheric rpm.