2Bros Parts

PISTON KIT 04-07 CRF250R 78.00, WISECO 4829M07800B HONDA MX

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Wiseco Piston Kit 4829M07800B for Honda CRF250R (2004-2007) and CRF250X (2004-2015). B Size, 77.95mm bore, 12.9:1 compression ratio. Forged pistons offer superior strength and durability for extreme racing conditions compared to cast pistons. Specifications: 249 cc displacement, 78.00 mm actual bore, 52.20 mm stroke, 1 cylinder, 12.8:1 actual compression ratio. Part number 56-W4829.B.WI. Weight 252 grams.

Specifications
SKU
56-W4829.B.WI
Brand
Wiseco
Availability
In Stock (1)

Fitments (20)

MakeModelYear
HONDACRF 250R2004
HONDACRF 250R2005
HONDACRF 250R2006
HONDACRF 250R2007
HONDACRF 250R2008
HONDACRF 250R2009
HONDACRF 250X2004
HONDACRF 250X2005
HONDACRF 250X2006
HONDACRF 250X2007
HONDACRF 250X2008
HONDACRF 250X2009
HONDACRF 250X2010
HONDACRF 250X2011
HONDACRF 250X2012
HONDACRF 250X2013
HONDACRF 250X2014
HONDACRF 250X2015
HONDACRF 250X2016
HONDACRF 250X2017
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
78mm
Variant Id
295781
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wiseco Forged Piston Kit for Honda CRF250R and CRF250X

This Wiseco Piston Kit is engineered for the demanding conditions of extreme racing. Featuring a forged construction, this piston offers superior toughness and durability compared to cast pistons, making it ideal for high-performance motorsport applications. Forged pistons possess condensed grain structure aligned to the part's features, resulting in enhanced mechanical properties and resistance to impact and fatigue, crucial for preventing catastrophic failure under extreme stress.

Key Features:

  • Forged construction for maximum strength and durability
  • Designed to withstand extreme racing conditions
  • Optimized strength-to-weight ratio
  • Actual Bore: 78.00 mm
  • Actual Compression Ratio: 12.8:1
  • B Size Piston

This kit is designed for a 249 cc displacement with a standard bore of 78.00 mm and a stroke of 52.20 mm. The compression ratio is specifically set at 12.9:1 for optimal performance.

Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

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Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

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