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2021 Yamaha YZ250F OEM Parts

Yamaha Yz250f Cylinder Head The 2019 YZ250F might not appear to be anything that changed from the outgoing model at first appearance, but take another look—it is! It has a revised suspension system, a new engine, a new frame, and better bodywork. It now resembles its larger sibling, the YZ450F, which underwent a significant redesign last year, almost exactly. Now it’s the turn of the 250.

Yamaha Yz250f Cylinder Head Overall, Yamaha maintained its rearward-slanted cylinder with its forward intake and rear exhaust in the downdraft fashion, but modified almost everything else. They began by building a new engine casing, stator, and rotor to house the new compact high-output electric starter. It actually released some power that was typically sucked up by the charging mechanism by getting rid of the manual kick start system. The engine no longer has to generate as much power from the stator thanks to the new lightweight lithium ion battery that has been installed to power the electric starter, which frees up more power for the back wheel. Hey, every little bit helps in the 250 class.

Yamaha raised the clutch plate thickness, the clutch spring count went up from five to six, and the clutch plate diameter. Thus, they were able to reduce the number of clutch friction plates from nine to eight. Due to the softer clutch spring pressure, the clutch action is now smoother and lighter than before, yet it still grabs incredibly strongly thanks to the additional spring for a broader distribution of clamping force. Yamaha Yz250f Cylinder Head You’ll be able to tell the difference from your 2018 YZ250F.

In terms of the chassis, the 2019 YZ250F boasts a brand-new bilateral beam aluminium frame that is now the same as the frame of the 2019 YZ450F. Because it is bigger than some of the other bikes and has a little inconsistent feel over high-speed bumps, the YZ has received criticism in prior years. In order to address these issues, engineers strengthened the frame in crucial locations, such as by repositioning the steering head tube 6 millimetres forward and modifying the backbone down tubes. Results are apparent.