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OEM & Performance ATV, UTV & Dirt Bike Parts for Yamaha, Honda, Polaris, Can-Am & More — Shipped Fast from BPRATV
OEM & Performance ATV, UTV & Dirt Bike Parts for Yamaha, Honda, Polaris, Can-Am & More — Shipped Fast from BPRATV

03-25 Yamaha YZ250 YZ 250 72mm BIG BORE Cylinder Piston Crank Motor Rebuild Kit

by BPRATV
Save 10% Save 10%
Original price $1,444.42
Original price $1,444.42 - Original price $1,444.42
Original price $1,444.42
Current price $1,299.98
$1,299.98 - $1,299.98
Current price $1,299.98
03-25 Yamaha YZ250 YZ 250 72mm BIG BORE Cylinder Piston Crank Motor Rebuild Kit

03-25 Yamaha YZ250 YZ 250 72mm BIG BORE Cylinder Piston Crank Motor Rebuild Kit

CBK0135, 4138, 808670, 822304, K012, 811670, 204543447645, PWR134-100, WB1157, PK1573, WPC126, NX-40025-BK, 5CU-11351-00, 5CU-11993-00, 5CU-11354-00, 93210-15639-00, 93210-53638-00, 5NX-13622-00, 90116-08394-00, 90176-08026-00, 90201-08087-00, WPC134, NX-40025, NX-40031T, MX-09153K

BPRATV / Magnum MX / Bronco / Hot Rods Complete BIG BORE Motor Rebuild Kit!

This is the BEST, MOST RELIABLE, and MOST AFFORABLE rebuild kit on the market!

Fits Yamaha YZ250 2 Stroke Dirt Bikes 

Years 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

This Rebuild Kit Includes:

  • Magnum MX 72mm 293cc Big Bore Cylinder Kit with a Nikasil Plated Cylinder - Designed by Eric Gorr
  • Larger Water Jackets for Increased Cooling!
  • Forged Moly Coated 72mm Big Bore Piston Kit (Includes, Piston, Pin, Rings & Clips) (Perfect For Pump Gas)
  • Big Bore Cylinder Head with Big Bore Power Valve Kit
  • Complete Top End Gasket Set
  • Hotrods Complete Heavy Duty Crankshaft Assembly (Includes Heavy Duty Connecting Rod)
  • Hot Rods Piston Wrist Pin Bearing
  • Hot Rods Heavy Duty Crank Main Bearings with Crank Seals
  • Vertex Complete Motor Engine Gasket Set
  • Vertex Complete Bottom End Engine Oil Seal Kit
  • And of course a new NGK Spark Plug to make sure it fires right up!

This is a bolt on kit with no machining required.  All parts come with warranty.

BPRATV - The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!

CBK0135, 4138, 808670, 822304, K012, 811670, 204543447645, PWR134-100, WB1157, PK1573, WPC126, NX-40025-BK, 5CU-11351-00, 5CU-11993-00, 5CU-11354-00, 93210-15639-00, 93210-53638-00, 5NX-13622-00, 90116-08394-00, 90176-08026-00, 90201-08087-00, WPC134, NX-40025, NX-40031T, MX-09153K

PROFESSIONAL INSTALLATION REQUIRED

DO YOU NEED THIS ITEM INSTALLED? WE HAVE YOU COVERED! CONTACT US FOR DETAILS.

REPAIR SHOPS AND DEALERS: CONTACT US TO SET UP AN ACCOUNT FOR WHOLESALE DISCOUNTS.

BPRATV: Over 20 Years of Excellence in Parts & Service
Upland, CA | Monday – Friday, 7 am – 4 pm PST
WE SHIP WORLDWIDE MONDAY THROUGH FRIDAY | ¡HABLAMOS ESPAÑOL!

Payments: Credit Card, PayPal, Venmo, Cash App, and In-Person (Cash/Check once cleared).


NOTICE REGARDING PHOTOS: Product photos used in our listings are for example only to show the high quality of our components. You will receive the correct quantity, size, and fitment of bearings, titanium fasteners, nuts, and bolts for the specific kit listed.

BEARING NOTICE: In some cases, you may receive SEALED bearings. If your application requires an OPEN bearing, the seals can easily be removed.

EMISSIONS & RACE USE ONLY: This product is exempt from emission standards and requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code §§ 27156 and 38391]. Sold ONLY for use with EPA-certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing. Installation may void vehicle manufacturers' warranty and/or may be illegal in some locations.

WARRANTY & LIABILITY: © BPRATV LLC 1-year limited warranty from manufacturer for material/workmanship defects.* Due to the nature of high performance and racing, components are sold without express/implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not be liable for specific, incidental, or consequential damages (loss of property, equipment, profits, or revenue) resulting from sale, installation, or use of these parts. This product is NOT DIY; we strongly recommend work be done by a qualified, experienced mechanic.

RETURNS: Returns accepted within 30 days for items 100% complete, brand new, and in original packaging. Items installed or prepped (lubricated/sealed) are ineligible. For warranty consideration, parts MUST be sent back for physical inspection. No exceptions. We do not warranty based on photos, emails, or third-party assessments.

SPECIALTY WARRANTIES: Cub Cylinders: Lifetime warranty for original owner via BPRATV/Millennium Technologies inspection; covers cylinder only. Titanium Fasteners: Failure during use results in replacement only. Neither warranty covers improper tuning, installation, maintenance, or misuse.

INTERCHANGEABLE PARTS: We may substitute parts of equal quality from different manufacturers to prevent backorder delays. Prices and listings subject to change without notice.

FEEDBACK: We work hard for your positive feedback. Please contact us before leaving feedback if you have any issues so we can assist you.

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