Wossner 2025

YAMAHA 4-STROKE

MODEL

YEARS

PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO

PISTON SIZE

OVERSIZE

RING SET

8713DA

76.96

STD

RIK77.00D

8713DB

76.97

+0.01

RIK77.00D

YZ 250 F

2008-2013

8713DC

14.1:1

13.5:1

76.98

+0.02

RIK77.00D

YZ 250 F

2014-2015

8893DA

76.95

STD

RIK77.00D

YZ 250 FX

2015-2016

8893DB

76.96

+0.01

RIK77.00D

13.7:1

13.5:1

WR 250 F

2015-2017

8893DC

76.97

+0.02

RIK77.00D

YZ 250 F

2014-2015

8894DA

76.95

STD

RIK77.00D

YZ 250 FX

2015-2016

8894DB

76.96

+0.01

RIK77.00D

14.5:1

13.5:1

WR 250 F

2015-2017

8894DC

76.97

+0.02

RIK77.00D

YZ 250 F

2016-2018

8942DA

76.95

STD

RIK77.00D

YZ 250 FX

2017-2019

8942DB

76.96

+0.01

RIK77.00D

13.7:1

13.5:1

WR 250 F

2018-2019

8942DC

76.97

+0.02

RIK77.00D

YZ 250 F

2016-2018

8946DA

76.95

STD

RIK77.00D

YZ 250 FX

2017-2019

8946DB

76.96

+0.01

RIK77.00D

14.2:1

13.5:1

WR 250 F

2018-2019

8946DC

76.97

+0.02

RIK77.00D

286

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