2004-2009 Honda CRF250R Engine Rebuild Kit Stock Bore Cylinder Piston

This new engine rebuild kit fits the 2004-2009 Honda CRF250R and is intended for a stock bore rebuild using a cylinder and piston setup. It is listed in eBay Motors and priced at $738.88. The title references components such as a piston and crank, but specific brand details and included parts can vary, so check the listing for details. Item condition is New. Free Shipping is included, making it easier to plan your rebuild without added delivery cost. Confirm compatibility with your exact year and any existing engine modifications before purchase.

USD 738.88
Condition: see listing
LocationUpland US
ShippingFree shipping (check listing for details)
Seller bpratv
100.0% positive · 32471 feedback
ListingFixedPrice · Active
Start time2025-09-25T05:23:33.000Z
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2004-2009 Honda CRF250R Engine Rebuild Kit Stock Bore Cylinder Piston Specs
BrandWiseco, Athena, Cometic, BPRATV, Honda CRF250R CRF 250R
TypeEngine Rebuild Kit
Engine Type4-Stroke
Items IncludedConnecting Rod Bearings, Connecting Rods, Crankshaft, Crankshaft Bearings, Cylinder Barrel, Gasket Set, Piston Rings, Pistons, Wrist Pins, Valve Stem Seals
FeaturesCorrosion-Resistant, Durable, Greasable, Sealed, The Best Parts. The Best Performance. The Best Price.
Manufacturer Part Number10001, 12100-KRN-670, 4829M07800, 4852M07800, C7185, 12100-KRN-732, 13101-KRN-850, 13000-KRN-A00, 91001-KRN-671, 12191-KRN-731, 13011-KRN-A10, 13111-KRN-850, 13115-KM7-700, 22201-KRN-670, 22321-KF0-770, K041, P400210850095, C7185, 822248,808262,811262,WCA056,M2042C,808268,8587DA,247607,274178, A-CRF250R-0409-78-CG / 4852M07800 / WPC159, 10001, 4083, CBK0119, M2060C, K073, B5056, B5052, WB1001
OE/OEM Part Number10001, 12100-KRN-670, 4829M07800, 4852M07800, C7185, 12100-KRN-732, 13101-KRN-850, 13000-KRN-A00, 91001-KRN-671, 12191-KRN-731, 13011-KRN-A10, 13111-KRN-850, 13115-KM7-700, 22201-KRN-670, 22321-KF0-770, K041, P400210850095, C7185, 822248,808262,811262,WCA056,M2042C,808268,8587DA,247607,274178, A-CRF250R-0409-78-CG / 4852M07800 / WPC159, 10001, 4083, CBK0119, M2060C, K073, B5056, B5052, WB1001
Machine TypeDual Sport Motorcycle, Off-road Motorcycle, Scooter, Street Motorcycle
Country of OriginUnited States
Performance PartYes
Vintage PartNo
California Prop 65 WarningThis product contains chemicals known to the state of California to cause cancer and reproductive harm. www.p65warnings.ca.gov
Interchange Part Number10001, 12100-KRN-670, 4829M07800, 4852M07800, C7185, 12100-KRN-732, 13101-KRN-850, 13000-KRN-A00, 91001-KRN-671, 12191-KRN-731, 13011-KRN-A10, 13111-KRN-850, 13115-KM7-700, 22201-KRN-670, 22321-KF0-770, K041, P400210850095, C7185, 822248,808262,811262,WCA056,M2042C,808268,8587DA,247607,274178, A-CRF250R-0409-78-CG / 4852M07800 / WPC159, 10001, 4083, CBK0119, M2060C, K073, B5056, B5052, WB1001
Manufacturer Warranty1 Year
Superseded Part Number10001, 12100-KRN-670, 4829M07800, 4852M07800, C7185, 12100-KRN-732, 13101-KRN-850, 13000-KRN-A00, 91001-KRN-671, 12191-KRN-731, 13011-KRN-A10, 13111-KRN-850, 13115-KM7-700, 22201-KRN-670, 22321-KF0-770, K041, P400210850095, C7185, 822248,808262,811262,WCA056,M2042C,808268,8587DA,247607,274178, A-CRF250R-0409-78-CG / 4852M07800 / WPC159, 10001, 4083, CBK0119, M2060C, K073, B5056, B5052, WB1001
CustomBuy Best Honda CRF250R 250X Top End Rebuild Kit On Sale Replace
Custom 1Honda CRF250R rebuild kit
Custom 2CRF250R piston crankshaft kit
Custom 3Wiseco forged piston CRF250R
Custom 4Athena Cometic gasket CRF250R
Custom 5Honda CRF250R engine rebuild parts
MPNA-CRF250R-0409-78-CG / 4852M07800 / WPC159, 10001, 4083, CBK0119
Replaces / Compared To:Athena, Cylinder Works, Honda OEM, OEM, Aftermarket Cylinders
Listing details

04-09 Honda CRF250R Stock Bore Cylinder Piston Wiseco Crank Motor Rebuild Kit US a,a:hover,a:active,a:visited 04-09 Honda CRF250R Stock Bore Cylinder Piston Wiseco Crank Motor Rebuild Kit US A-CRF250R-0409-78-CG / 4852M07800, 10001,P400210100008,P400210100009,P400210160006,12100-KRN-670, 4829M07800, 4852M07800, M2042C, C7185, 71014-4, 14401-KRN-671, HC92RH2015104, ‎VTKTC22983A, 10001-K01, HC92RH2015104, 31.1335, CC001, 06113-KRN-700, 06113-KRN-710, 06113-KSC-700, 12100-KRN-672, 12100-KRN-730, 12100-KRN-731, 12100-KRN-732, 12191-KRN-671, 12191-KRN-731, 12251-KRN-671, 12251-KRN-731, 13011-KRN-670, 13011-KRN-850, 13101-KRN-670, 13101-KRN-850, 13111-KRN-670, 13111-KRN-850, 13115-KM7-700,S4F07800002A,S4F07800002B,S41316099,S4F07800002 04-09 Honda CRF250R Stock Bore Cylinder Piston Wiseco Crank Motor Rebuild Kit ⚡ Complete CRF250R Engine Rebuild Solution ⚡ Restore and upgrade your Honda CRF250R with this all-in-one BPRATV / Wiseco / Cometic / Athena / Koyo / NTN Motor Rebuild Kit. Designed for 2004-2009 models, this kit provides everything you need for a reliable and powerful rebuild—featuring premium forged piston, heavy-duty crankshaft, and top-quality gaskets and seals. 🔧 Kit Features & Benefits 🔧 Engineered for performance and longevity, each component in this rebuild kit is made to meet or exceed OEM

specifications, backed by trusted names like Wiseco and Cometic. BPRATV 78mm Stock Bore Nikasil Plated Cylinder with 1-year warranty* Wiseco 78mm Stock Bore Forged Piston Kit (Works with Pump or Race Gas!) for high-performance compression Wiseco Heavy Duty Complete Crankshaft Assembly with connecting rod Koyo / NTN Main Crank Bearings – premium Japanese-made quality Wiseco Bottom End Gasket & Oil Seal Kit (Athena or Cometic manufactured) Cometic Top End Gasket Kit with MLS head gasket Viton Valve Stem Seals – included, unlike many competitor kits ✅ Fitment Compatibility ✅ This kit is a direct fit for all Honda CRF250R models from 2004-2009. Perfect for stock replacement or performance rebuilds. Honda CRF250R (2004-2009) Replaces Honda OEM Part Numbers(s): 12100-KRN-732, 13101-KRN-850, 13000-KRN-A00, 91001-KRN-671, 91002-KRN-A11, and more All components are brand new and covered by warranty ❓ Frequently Asked Questions (FAQ) ❓ Q: Does this kit include everything for a complete rebuild? A: Yes, this package includes cylinder, piston kit, crankshaft, bearings, seals, and both top and bottom end gaskets. Q: Are the parts OEM or aftermarket? A: All parts are high-quality aftermarket replacements from trusted brands such as Wiseco, Cometic, Athena, and Koyo. Q: Do I need machining for installation? A: No, this is a bolt-on rebuild kit designed to fit without additional machining. Q: Is there a warranty included? A: Yes, all major components include a 1-year warranty for your peace of mind. 🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟 At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We provide only the highest quality rebuild kits, ensuring your bike runs stronger and lasts longer. Trust BPRATV to deliver the parts you need to keep your Honda CRF250R running at its absolute best, every single time. 🔥 Upgrade your CRF250R with confidence – install this complete Wiseco/BPRATV kit today and ride stronger! 🔥 BPRATV - The Best Parts. The Best Performance. The Best Price. BRAPPPPPPPPPP! © BPRATV 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.