MSV Racing 2017–2020 Honda CRF450R, CRF450RX & CRF450RWE Billet Case Saver / Sprocket Guard

Protect the vulnerable engine case on your Honda CRF450 with the MSV Racing Billet Case Saver and Sprocket Guard, designed specifically for 2017–2020 CRF450R, CRF450RX and CRF450RWE models.

Precision CNC-machined from high-strength 6061-T6 billet aluminum, this one-piece guard features a fully radiused interior profile designed to help redirect a broken or derailed chain downward and away from the engine case.

Product Highlights

• Fits 2017–2020 Honda CRF450R
• Fits 2017–2020 Honda CRF450RX
• Fits applicable CRF450RWE models within the listed year range
• Helps protect the engine case from broken or derailed chain damage
• Fully radiused interior profile helps redirect chain energy downward
• One-piece CNC-machined construction
• Made from high-strength 6061-T6 billet aluminum
• Accommodates up to a 14-tooth front sprocket
• Direct bolt-on installation using OEM fasteners
• No drilling, grinding or permanent modifications required
• Available in polished aluminum or Graphite Black Cerakote
• Designed and manufactured by MSV Racing
• In stock and ready to ship

Protect Your CRF450 Engine Case

A broken, loose or derailed drive chain can bunch around the countershaft sprocket and strike the engine case with tremendous force.

That type of failure can cause:

• Cracked or broken engine cases
• Oil loss
• Countershaft-area damage
• Expensive engine removal and repair
• A ruined race or riding trip

The MSV Racing Billet Case Saver places a strong aluminum barrier around this vulnerable area to help reduce the risk of catastrophic damage.

Fully Radiused Chain-Deflection Profile

The interior of the case saver is smoothly radiused rather than sharply squared.

If the chain breaks or leaves the front sprocket, the curved profile is designed to help guide the chain’s forward energy downward and away from the engine case. This reduces the chance of the chain bunching against a sharp internal surface and concentrating impact directly into the case.

No case saver can guarantee protection in every chain failure, but this purpose-built design provides an important additional layer of defense.

One-Piece 6061-T6 Billet Construction

Each case saver is precision-machined from a solid piece of 6061-T6 billet aluminum.

Benefits include:

• Excellent strength
• Accurate fitment
• Consistent sprocket clearance
• Lightweight protection
• Resistance to bending and deformation
• Clean, factory-quality appearance
• Long-lasting durability

The one-piece design eliminates welded joints and provides consistent strength throughout the guard.

Fits Up to a 14-Tooth Front Sprocket

The MSV Racing case saver is designed to accommodate front sprockets up to 14 teeth, providing flexibility for stock and performance gearing combinations.

Always verify adequate clearance between the chain, sprocket and case saver before operating the motorcycle, particularly after changing gearing.

Direct Bolt-On Installation

The guard installs in the original mounting location using the motorcycle’s OEM fasteners.

Installation Benefits

• No drilling
• No grinding
• No permanent engine modifications
• Uses factory mounting points
• Straightforward bolt-on installation

Inspect the OEM fasteners before reuse and replace any damaged, corroded or incorrect hardware.

Available Finishes

Polished Aluminum

A bright billet finish that highlights the precision CNC machining and gives the motorcycle a clean performance appearance.

Graphite Black Cerakote

A durable, understated finish that provides a stealthy factory-style look while helping protect the aluminum surface.

Exact Fitment

Honda CRF450R

• 2017 Honda CRF450R
• 2018 Honda CRF450R
• 2019 Honda CRF450R
• 2020 Honda CRF450R

Honda CRF450RX

• 2017 Honda CRF450RX
• 2018 Honda CRF450RX
• 2019 Honda CRF450RX
• 2020 Honda CRF450RX

Honda CRF450RWE

Fits applicable CRF450RWE models within the listed 2017–2020 application range. Confirm model-year compatibility before ordering.

Ideal for Demanding Riding

This billet case saver is an excellent upgrade for:

• Motocross
• Off-road racing
• Woods riding
• Trail riding
• Dune riding
• Modified engines
• High-horsepower builds
• Riders replacing a damaged or missing factory guard

Important Chain-Maintenance Notice

A case saver adds protection, but it does not replace proper drivetrain maintenance.

Before every ride:

• Inspect the chain for damaged or stiff links
• Verify correct chain tension
• Check chain alignment
• Inspect the front and rear sprockets
• Confirm mounting fasteners are secure
• Verify adequate chain and sprocket clearance

Replacing worn chains and sprockets before failure remains the best way to protect the motorcycle.

Serious Protection with a Clean Factory Look

The MSV Racing 2017–2020 Honda CRF450R, CRF450RX and CRF450RWE Billet Case Saver combines purpose-built engine protection, one-piece billet strength and a clean custom finish.

Protect your CRF450 before a chain failure turns into an expensive engine repair.

Precision machined. Direct bolt-on. Built for serious riders.