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Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.
Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.

Yamaha YZ125 / YZ125X

Rebuild Kits
Top End | Bottom End | Complete Engine Kit |

Parts
Bearings | Clutch Components | Cylinder Head & Stud Kits | Gaskets & Seals | Pistons | Stud Kits |

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$931.95
$931.95 - $931.95
$931.95
$838.76
$838.76 - $838.76
$838.76

97-04 Yamaha YZ125 YZ 125 54mm 54 Athena Stock Bore Cylinder Top End Piston Kit

Athena

5MV-11111-00-00 5HD-1131D-10-00 5HD-1132D-10-00 5NY-11311-11-00 90116-08394-00 93210-63442-00 90201-080L8-00 90176-08026-00 4XM-11633-10-00 5NY-116...

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$931.95
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$931.95
$838.76
$838.76 - $838.76
$838.76
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Save 23% Save %
$1,398.99
$1,398.99 - $1,398.99
$1,398.99
$1,074.44
$1,074.44 - $1,074.44
$1,074.44

98-00 Yamaha YZ125 YZ 125 58mm 144cc Athena Big Bore Cylinder Crank Rebuild Kit

Athena

P400485100029, WPC124,P400485100030,WPC163,4SS-11311-30-00, 5DH-11400-00-00, 4XM-11631-30-D0,P400485100017, WPC125, 5NY-11311-11-00,CBK0014, 4036, ...

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$1,398.99
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$1,398.99
$1,074.44
$1,074.44 - $1,074.44
$1,074.44
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$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36

97-04 Yamaha YZ125 YZ 125 58mm 144cc Athena Big Bore Cylinder Top End Piston Kit

Athena

Athena 58mm 144cc Big Bore Cylinder Top End Kit!This is the best and most reliable big bore kit on the market & NO ONE SELLS IT FOR LESS! Fits ...

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$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36
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Save 24% Save %
$1,412.20
$1,412.20 - $1,412.20
$1,412.20
$1,073.22
$1,073.22 - $1,073.22
$1,073.22

05-21 Yamaha YZ125 YZ 125 58mm 144cc Athena Big Bore Cylinder Crank Rebuild Kit

Athena

P400485100030,WPC163,4SS-11311-30-00, 5DH-11400-00-00, 4XM-11631-30-D0,P400485100017, WPC125, 5NY-11311-11-00,CBK0014, 4036, k010, 822172,B5009,WB1...

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$1,412.20
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$1,412.20
$1,073.22
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$1,073.22
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$1,349.90
$1,349.90 - $1,349.90
$1,349.90
$1,048.89
$1,048.89 - $1,048.89
$1,048.89

02-04 Yamaha YZ125 YZ 125 54mm Athena Cylinder Piston Hot Rods Crank Rebuild Kit

Athena

Athena 54mm Complete Stock / Standard Bore Motor Rebuild Kit!This is the best and most reliable rebuild kit on the market, and NO ONE SELLS IT FOR ...

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$1,349.90
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$1,349.90
$1,048.89
$1,048.89 - $1,048.89
$1,048.89
Save 22% Save %
Save 10% Save %
$931.95
$931.95 - $931.95
$931.95
$838.76
$838.76 - $838.76
$838.76

05-21 Yamaha YZ125 YZ 125 X 54mm Athena Piston Cylinder Head Top End Rebuild Kit

Athena

Athena 54mm 125cc Cylinder Top End Kit!This is the best and most reliable rebuild kit on the market & NO ONE SELLS IT FOR LESS! Fits Yamaha YZ1...

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$931.95
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$931.95
$838.76
$838.76 - $838.76
$838.76
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$1,110.95 - $1,110.95
$1,110.95
$1,110.95
$1,110.95 - $1,110.95
$1,110.95

20-22 Yamaha YZ125X YZ 125X 54mm Athena Piston Cylinder Head Top End Rebuild Kit

Athena

Restore your Yamaha YZ125X with the Athena 54mm cylinder, piston, head, and gasket top end rebuild kit. Fits 2020–2022 models. High-performance, du...

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$1,110.95 - $1,110.95
$1,110.95
$1,110.95
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$1,110.95
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$47.95
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$47.95
$44.88
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$44.88

Athena Yamaha YZ125 YZ 125 54mm Standard Stock Bore Cylinder Top End Gaskets Kit

Athena

P400485160003,8051764546060, C7853, C7936, 93210-90785-00, 93210-63442-00, 5DH-11351-01-00, 5DH-11351-01-00, 4JY-11993-00, 4JY-11993-00, 5MV-14642-...

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$47.95
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$47.95
$44.88
$44.88 - $44.88
$44.88
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Save 28% Save %
$1,412.20
$1,412.20 - $1,412.20
$1,412.20
$1,023.33
$1,023.33 - $1,023.33
$1,023.33

05-21 Yamaha YZ125 YZ 125 54mm Athena Cylinder Piston Wiseco Crank Rebuild Kit

Athena

P400485100030,WPC163,4SS-11311-30-00, 5DH-11400-00-00, 4XM-11631-30-D0,P400485100017, WPC125, 5NY-11311-11-00,CBK0014, 4036, k010, 822172,B5009,WB1...

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$1,412.20
$1,412.20 - $1,412.20
$1,412.20
$1,023.33
$1,023.33 - $1,023.33
$1,023.33
Save 28% Save %
Save 28% Save %
$1,412.20
$1,412.20 - $1,412.20
$1,412.20
$1,023.33
$1,023.33 - $1,023.33
$1,023.33

98-00 Yamaha YZ125 YZ 125 54mm Athena Cylinder Piston Wiseco Crank Rebuild Kit

Athena

P400485100003,P400485100030,WPC124,WPC163,4SS-11311-30-00, 5DH-11400-00-00, 4XM-11631-30-D0,P400485100017, WPC125, 5NY-11311-11-00,CBK0014, 4036, k...

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$1,412.20
$1,412.20 - $1,412.20
$1,412.20
$1,023.33
$1,023.33 - $1,023.33
$1,023.33
Save 28% Save %
Save 21% Save %
$99.99
$99.99 - $99.99
$99.99
$78.98
$78.98 - $78.98
$78.98

Yamaha YZ125X YZ 125X TITANIUM Athena Cylinder Head Bolts Studs Cylinder to Case

Athena

Experience the power of titanium with the Yamaha YZ125X Titanium Athena Cylinder Head Bolts Studs Cylinder to Case - the strongest, lightest fasten...

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$99.99
$99.99 - $99.99
$99.99
$78.98
$78.98 - $78.98
$78.98
Save 21% Save %
Save 10% Save %
$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36

05-21 Yamaha YZ125 YZ 125 58mm 144cc Athena Big Bore Cylinder Top End Piston Kit

Athena

Athena 58mm 144cc Big Bore Cylinder Top End Kit!This is the best and most reliable big bore kit on the market & NO ONE SELLS IT FOR LESS!Fits Y...

View full details
$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36
Save 10% Save %
Save 10% Save %
$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36

20-22 Yamaha YZ125X YZ 125X 58mm 144 Athena Big Bore Cylinder Top End Piston Kit

Athena

Athena 58mm 144cc Big Bore Cylinder Top End Kit!This is the best and most reliable big bore kit on the market & NO ONE SELLS IT FOR LESS!Fits Y...

View full details
$1,025.95
$1,025.95 - $1,025.95
$1,025.95
$923.36
$923.36 - $923.36
$923.36
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