Motorcycle Camshaft Replacement: A Complete Guide for Riders

When your motorcycle starts losing power, making unusual engine noises, or experiencing poor fuel efficiency, a worn-out camshaft could be the culprit. Replacing your motorcycle camshaft is a critical repair that can restore performance and prevent further engine damage.

In this guide, we'll cover:

Signs you need a camshaft replacement
How to choose the right replacement camshaft
OEM vs. aftermarket camshafts: pros and cons
Step-by-step replacement process
Maintenance tips to extend camshaft life

Signs Your Motorcycle Camshaft Needs Replacement

A failing camshaft can cause several noticeable symptoms:
Loss of Power – Weak acceleration or reduced top speed
Engine Misfires – Rough idling or hesitation under throttle
Loud Ticking Noise – Worn lobes or bearings create excessive valvetrain noise
Poor Fuel Economy – Incorrect valve timing leads to inefficient combustion
Check Engine Light – Camshaft position sensor errors (if equipped)
If you notice these issues, inspect your camshaft for wear, scoring, or bent lobes.

Choosing the Right Replacement Camshaft

You have two main options when replacing a motorcycle camshaft:
1. OEM (Original Equipment Manufacturer) Camshaft
Pros:
Perfect fit for your bike's engine
Matches factory performance specs
Reliable durability

Cons:
More expensive than aftermarket options
Limited performance upgrades

2. Aftermarket Camshaft
Pros:
Often cheaper than OEM parts
Performance-oriented designs available (higher lift, longer duration)
More material choices (billet steel, hardened alloys)

Cons:
Quality varies by brand
May require additional tuning for optimal performance

Comparison Table

Motorcycle Camshaft Replacement Steps

While exact steps vary by bike, here's a general overview:
Drain Engine Oil – Prevent spills when removing the valve cover.
Remove Valve Cover – Access the camshaft and timing components.
Mark Timing – Align crankshaft and camshaft positions (critical for reassembly).
Remove Old Camshaft – Unbolt cam caps and carefully extract the camshaft.
Install New Camshaft – Lubricate lobes and bearings before fitting.
Reassemble & Adjust Timing – Double-check alignment before starting the engine.
Refill Oil & Test Ride – Monitor for unusual noises or performance issues.

Note: Some bikes require special tools (e.g., cam chain tensioner tools). Consult your service manual.

Maintenance Tips to Extend Camshaft Life

Use Quality Oil – Change oil regularly (synthetic oils reduce wear).
Check Valve Clearances – Improper lash accelerates cam lobe wear.
Avoid Over-Revving – Excessive RPMs increase valvetrain stress.
Inspect Timing Components – Worn chains or belts can damage camshafts.