Description
Help Prevent Costly Engine-Case Damage
A broken or derailed chain can bunch around the countershaft sprocket and strike the engine case with enough force to crack it, cause oil loss, and end your race or riding trip.
The MSV Racing Billet Case Saver and Sprocket Guard places a strong, purpose-built barrier around this vulnerable area. Its fully radiused interior profile is designed to help redirect a loose or broken chain downward and away from the engine case.
In stock and ready to ship. Available in polished aluminum or Graphite Black Cerakote.
Exact Fitment
- 2017–2020 Honda CRF450R
- 2017–2020 Honda CRF450RX
- 2017–2020 Honda CRF450RWE
- Accommodates front sprockets up to 14 teeth
Product Highlights
- Helps protect the engine case from broken or derailed chain damage
- Fully radiused interior profile helps redirect chain energy downward
- Precision CNC-machined from solid 6061-T6 billet aluminum
- Strong, lightweight one-piece construction
- Accommodates front sprockets up to 14 teeth
- Direct bolt-on installation using OEM fasteners
- Uses the motorcycle’s factory mounting points
- 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
Why the Radiused Design Matters
A case saver needs to do more than simply cover the countershaft sprocket.
During a chain failure, sharp or squared interior surfaces can provide an area where the chain can bunch and concentrate force. The MSV Racing case saver uses a smoothly radiused interior profile designed to help guide the chain’s forward energy downward and away from the engine case.
The difference is not simply the material—it is the purpose-built internal geometry.
No case saver can guarantee protection during every chain failure, but this design provides an important additional layer of defense around one of the engine’s most vulnerable areas.
One-Piece 6061-T6 Billet Construction
Each MSV Racing case saver is precision CNC-machined from a solid piece of 6061-T6 billet aluminum.
Benefits include:
- Accurate bolt-on fitment
- Consistent sprocket clearance
- Strength without unnecessary weight
- Resistance to bending and deformation
- Clean, factory-quality appearance
- Long-lasting durability
The one-piece construction contains no welded joints or assembled sections, providing consistent strength throughout the guard.
Fits Up to a 14-Tooth Front Sprocket
The MSV Racing case saver accommodates 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—especially after changing gearing.
Direct Bolt-On Installation
The case saver installs at the motorcycle’s original mounting location using the existing OEM fasteners.
Installation Benefits
- Uses factory mounting points
- No drilling required
- No grinding required
- No permanent engine modifications
- Straightforward bolt-on installation
Inspect the OEM fasteners before installation. Replace any hardware that is damaged, corroded, or incorrect.
After installation, rotate the rear wheel by hand and verify adequate clearance around the chain and front sprocket before operating the motorcycle.
Available Finishes
Polished Aluminum
A bright billet finish that highlights the precision CNC machining and provides a clean performance appearance.
Graphite Black Cerakote
A durable, understated finish that provides a stealthy factory-style appearance while helping protect the aluminum surface.
Frequently Asked Questions
Will it fit all three CRF450 models?
Yes. It fits the 2017–2020 Honda CRF450R, CRF450RX, and CRF450RWE.
Will it fit a 14-tooth front sprocket?
Yes. The case saver is designed to accommodate front sprockets up to 14 teeth. Always verify chain and sprocket clearance before riding.
Does installation require drilling or grinding?
No. The case saver uses the motorcycle’s original mounting location and requires no permanent modifications.
Are mounting fasteners included?
The case saver is designed to install using the motorcycle’s existing OEM fasteners.
Does a case saver guarantee that the engine case cannot be damaged?
No case saver can guarantee protection during every chain failure. This product is designed to reduce the risk by placing a billet barrier around the vulnerable countershaft area and helping redirect a loose or broken chain downward.
Important Chain-Maintenance Notice
A case saver adds protection, but it does not replace proper drivetrain maintenance.
Before riding:
- Inspect the chain for damaged or stiff links
- Verify correct chain tension
- Check chain alignment
- Inspect the front and rear sprockets
- Confirm the mounting fasteners are secure
- Verify adequate chain and sprocket clearance
Replacing worn chains and sprockets before failure remains the best way to protect your motorcycle.
Protect Your CRF450 Before the Chain Fails
A cracked engine case can mean oil loss, expensive repairs, engine removal, and a ruined race or riding trip.
Add purpose-built billet protection before it is needed.
Precision machined. Direct bolt-on. Built for serious riders.
Fitment