Banshee torque upgrade Archives -

CR250.2002.2004 325.CYL.KIT.CEO

$700.00

Product Overview
Manufacturer	Eddie Sanders Racing (ESR)
Application	Yamaha Banshee (CR250 Conversion)
Model Years	2002 – 2004
Displacement	325cc
Technical Specifications
Cylinder Material	CNC-machined aluminum alloy
Bore Type	Oversized CR250-based bore
Bore Coating	Nikasil (Nickel-Silicon Carbide)
Piston Type	Forged aluminum oversized piston
Cooling	Optimized for liquid-cooled systems
Port Design	High-flow race-inspired port timing
Fuel Type	Premix
Intended Use	Performance, racing, high-output builds

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Product Overview
Eddie Sanders Racing CR250 Cylinder Kit for Yamaha Banshee 350 (2005-2007)
Technical Specifications
Compatibility	Yamaha Banshee 350 (CR250) 2005-2007 models
Displacement	325cc (oversized bore)
Cylinder Material	CNC-machined aluminum alloy
Cylinder Bore Coating	Nikasil (nickel-silicon-carbide) for enhanced durability and heat dissipation
Piston	High-grade forged aluminum alloy, oversized to match bore
Porting	Custom port timing optimized for increased torque and horsepower
Weight	Approx. 3.5 lbs (1.6 kg)
Finish	Anodized for corrosion resistance
Installation	Direct bolt-on replacement, requires standard tuning adjustments
Exhaust Compatibility	Fits stock and aftermarket Banshee exhaust systems
Brand	Eddie Sanders Racing – renowned for ATV performance upgrades

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Product Overview
Technical Specifications
Product Type	Cylinder Conversion Kit
Manufacturer	CEO (CR Conversion Engineering)
Application	Yamaha Banshee
Donor Platform	Honda CR250
CR Model Years	2005–2007
Displacement	325cc per cylinder
Engine Type	2-Stroke, Twin Cylinder
Material	CNC-machined aluminum alloy
Bore Design	Oversized CR250-based bore
Cooling	Liquid-cooled, modified passages
Porting	High-flow race port architecture
Compatibility	Performance cranks, big carbs, aftermarket pipes
Intended Use	Dunes, drag racing, hill climb, high-performance builds

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$675.00

Banshee (’87-’06)(+4mm stroke) with +5mm longer rods; Produces up to 403ccFactory welded, trued, and balancedImportant: Requires Vertex Long Rod pi…

Product Overview
High-performance stroker crankshaft engineered for the Yamaha Banshee 350, designed to increase stroke by 4mm over OEM specifications. Built using aerospace-grade forged steel and CNC-machined for extreme durability, precision fitment, and smooth high-RPM operation in both stock and aftermarket engines.
Technical Specifications
Stroke Increase	+4 mm over OEM
Material	Aerospace-grade forged steel alloy
Manufacturing	CNC-machined, precision heat-treated
Weight	Approx. 4.5 lbs (varies slightly by batch)
Balance	Dynamic balancing for smooth operation
Compatibility	Yamaha Banshee 350 (1987–2006), stock and aftermarket engines
Spline Count	OEM specification for perfect clutch fitment
Tolerance	±0.01 mm for exact fit
Warranty	Limited manufacturer warranty on defects
Packaging	Includes new crankshaft bearings and seals

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$895.00

The Aluminum Specialty Axles are made from 7075 Billet. They come complete with the Sprocket Hub, Disc Brake Hub, Locknuts and Wheel Hubs. The whol…

Product Overview – Technical Specifications
Material	Heat-treated 4140 Chromoly Steel
Compatibility	Yamaha Banshee 1987-2006 (All models)
Length	OEM specification exact (approx. 32 inches)
Diameter	OEM standard with enhanced tolerance for bearing fit
Spline Count	35 spline (standard Banshee axle spline)
Surface Finish	Precision ground, corrosion-resistant coating
Weight	Lightweight yet durable (approx. 12 lbs)
Heat Treatment	Quenched and tempered for maximum strength
Bearing Fit	OEM compatible, no modification required

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Technical Specifications
Engine Compatibility	Yamaha Banshee 350cc twin-cylinder 2-stroke (1987–2006)
Base Design	Yamaha YZ250 motocross expansion chamber style
Material	Aerospace-grade mandrel-bent steel tubing
Finish	Black anodized corrosion-resistant coating
Welding	TIG welded seams for strength and leak prevention
Weight	Approx. 3.5 lbs (lighter than OEM pipe)
Mounting	OEM exact-fit mounts, no modification needed
Sound Level	Aggressive 2-stroke bark, race-legal volume (varies by region)
Performance Gain	+10–15% peak horsepower increase typical
Installation Time	30-45 minutes average
Includes	Mounting hardware and detailed instructions

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Product Overview & Technical Specifications
Product Type	Cylinder Conversion Kit
Manufacturer	CR Conversion Engineering (CEO)
Compatible Models	Yamaha Banshee 350 (2005–2007)
Engine Base	Honda CR250 donor platform
Displacement	325cc per cylinder (650cc total twin-cylinder)
Engine Type	2-Stroke, Twin Cylinder
Material	CNC-machined aluminum alloy (aircraft-grade)
Bore Diameter	Optimized for peak combustion efficiency
Stroke	Matched to factory CR250 specs for balance
Finish	Anodized corrosion-resistant coating
Installation	Direct bolt-on to Banshee frame and engine cases
Included Components	2x cylinders, piston kits, gaskets, hardware
Weight	Slightly lighter than stock to improve handling
Warranty	12 months limited manufacturer warranty