TB Parts Maintenance Kit – KLX140

TB Parts Maintenance Kit – KLX140TB Parts Maintenance Kit KLX140 TB Parts Maintenance kit the smartest way to upgrade or rebuild your KLX140. Designed for riders installing a big bore or stroker crank, or rebuilding the bottom end, this kit bundles the most critical upgrades into one high value packagesaving time and money over buying parts individually. Whats Included: Lightweight Titanium Engine Cover Bolt Kit: 14 piece titanium bolt set Allen socket head design Lightweight,

TB Parts Maintenance Kit – KLX140

TB Parts Maintenance kit the smartest way to upgrade or rebuild your KLX140. Designed for riders installing a big bore or stroker crank, or rebuilding the bottom end, this kit bundles the most critical upgrades into one high-value package—saving time and money over buying parts individually.

What’s Included:

Lightweight Titanium Engine Cover Bolt Kit:

• 14-piece titanium bolt set

• Allen socket head design

• Lightweight, corrosion resistant

• Replaces OEM engine cover hardware

Heavy-Duty Starter Motor:

• Built for high-compression and big bore engines

• Manufactured in Japan

• Direct bolt-on replacement

• Works great on stock engines

Cam Bolt & Pin Kit:

• Reverse-thread cam bolt

• Includes cam pin

• Direct replacement for all KLX140 models

Center Case Bearing Kit

• Complete set of NTN transmission and shift drum bearings

• Includes replacement dowel pins and screws

• Ideal when splitting cases

HD Kevlar Clutch Kit:

• Kevlar friction plates

• Dimpled steel plates

• 15% stiffer springs

• Deletes OEM jitter components

Oil Filter:

• Essential maintenance item

• Helps extend engine life

170cc High-Compression Forged Big Bore Kit:

• Forged piston with rings, pin, and clips

• 63mm aluminum cylinder with steel sleeve

• Safe with 91+ octane pump fuel

• Compatible with stroker crank builds

Note: 2025+ KLX140s – require case boring to fit. Our cylinder skirt is 65.95mm 2025+ cases are only 65.4mm wide.

Why This Kit Works

This kit covers the most common wear and failure points when building power or refreshing a high-hour KLX140. The HD starter, clutch, bearings, and hardware are designed to handle increased compression and displacement, making it ideal for stroker installs or full bottom-end rebuilds.