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Engines and Components› Cylinder Heads and Components

Athena

Athena 08-17 Yamaha WR 250 R Big Bore Complete Cylinder Kit

$1,251.95 $988.75 Save $263.20

SKU: A0EF P400485100032

Out of Stock
In Stock
Ships by Jun 12
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Athena Cylinder kits are designed and produced in-house to the highest quality and efficiency standards. Athena's Big Bore Cylinder Kits offer increased performance while maintaining the reliability offered by original components. Standard Bore Cylinder kits are designed to be direct replacements of the original equipment and maintain the same performance as OEM.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAthena
Part NumberA0EF P400485100032

Videos

WR250R - Athena 290 and Hot Rods Stroker Crank

WR250R - Athena 290 and Hot Rods Stroker Crank
Yamaha WR250X/WR250R Cam Chain & Tensioner Replacement Guide (26,000 Mile Service)

Yamaha WR250X/WR250R Cam Chain & Tensioner Replacement Guide (26,000 Mile Service)
The Unicorn Dual-Sport Has Arrived - Yamaha WR250R Review

The Unicorn Dual-Sport Has Arrived - Yamaha WR250R Review
Yamaha WR250R (WR250X) Review - My Take

Yamaha WR250R (WR250X) Review - My Take
So You Want a Yamaha WR250R... (Best Dual Sport)

So You Want a Yamaha WR250R... (Best Dual Sport)
5 Reasons To Buy A WR250R In 2022 (Best Dual Sport)

5 Reasons To Buy A WR250R In 2022 (Best Dual Sport)
Yamaha WR250R ADV/Dual Sport Bike Build

Yamaha WR250R ADV/Dual Sport Bike Build
Why I sold my Yamaha WR250R after only 1 year

Why I sold my Yamaha WR250R after only 1 year
I FINALLY BOUGHT A SUPERMOTO! Yamaha WR250X | ADOBO MOTO S2E9

I FINALLY BOUGHT A SUPERMOTO! Yamaha WR250X | ADOBO MOTO S2E9
Why I Bought A Yamaha WR250R

Why I Bought A Yamaha WR250R
WR250R 5 Must Do mods and 6 year review

WR250R 5 Must Do mods and 6 year review
ML2 Yamaha Lowering Link for WR250R/X Installation Video

ML2 Yamaha Lowering Link for WR250R/X Installation Video
These 3 Mods TOTALLY CHANGED My Yamaha WR250R

These 3 Mods TOTALLY CHANGED My Yamaha WR250R
WR250X Big bore install [UPDATE 3]

WR250X Big bore install [UPDATE 3]
Part 6: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 25

Part 6: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 25
Part 1: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 250

Part 1: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 250
wr250x big bore kit install success!

wr250x big bore kit install success!
Wr250x Athena 290 Big Bore First Startup

Wr250x Athena 290 Big Bore First Startup
WR250X Big bore install [UPDATE 2]

WR250X Big bore install [UPDATE 2]
Part 3: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 25

Part 3: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 25

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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