Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-1_fc402895-e320-4c5d-bddb-3ccc5711a79d.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-2_d9005bd9-cc7e-4977-ad51-f31856fec2d8.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-3_90cf6bcf-202f-409e-8fd3-4e2cac5532be.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-4_8abe91af-da68-4c6a-baf2-b7ba5406f4ee.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-5_6c10bfc3-11f6-4b41-a7ab-81589999f4f9.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-6_f4b55ee8-3bb9-4554-9571-3733f9fe7d3b.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-7_7722892f-28e2-402f-b7e1-7684ccde1160.jpg?v=1788447467&width=900)
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899002-8_d9e25993-1e9d-4e5f-a0f5-c484d900db4c.jpg?v=1788447467&width=900)
Description
WÖSSNER Pro Series forged pistons for Yamaha YZ 250 F
The forged WÖSSNER Pro Series forged piston is intended for the Yamaha YZ 250 F (CG 39) from the years 2017-2018. Its aluminum design combines the Pro Series design with a forged double bridge and defined dimensions for selecting the right piston.
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons – product view](https://cdn.shopify.com/s/files/1/0871/4616/8646/files/1093899002-1_fc402895-e320-4c5d-bddb-3ccc5711a79d.jpg?v=1788447467)
Technical features
- Piston Type: Forged
- Material: aluminum
- Diameter Ø: 76.96 mm
- Letter oversize: B
- Oversize: +0.01
- Bore diameter: 77.01mm
- Compression ratio: 13.7:1
- Rings Quantity: 2
- Specificity: Forged double bridge
Vehicle assignment
The piston is assigned to the Yamaha YZ 250 F (CG 39), built in 2017-2018. Before choosing, check in particular the specified diameter of 76.96 mm, the letter of the oversize B and the bore diameter of 77.01 mm.
Selection note
The technical characteristics support the comparison with the existing engine dimensions. The compression ratio of 13.7:1 and the two-ring design are among the defined features of this piston.
![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons - detailed view](https://cdn.shopify.com/s/files/1/0871/4616/8646/files/1093899002-2_d9005bd9-cc7e-4977-ad51-f31856fec2d8.jpg?v=1788447467)
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![Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER forged pistons](http://motorize-ireland.com/cdn/shop/files/1093899003-2_b9437b81-7239-4a99-97c6-85b951fbbcbc.jpg?v=1788447540&width=360)