Twin Case Boring Tool - JIMS USA

The JIMS USA Model 1408 Twin Case Boring Tool is an essential specialized tool designed for modifying Harley-Davidson Twin Cam® engine cases. It facilitates the installation of larger bore cylinders, enabling performance upgrades for a range of Twin Cam® models from 1999 to the present. This tool allows mechanics and enthusiasts to precisely bore engine cases in-house, streamlining the big bore conversion process.

Specifications

The JIMS USA Twin Case Boring Tool, Model 1408, is specifically engineered for use on all Harley-Davidson Twin Cam® models, including both A and B versions, produced from 1999 to the present. It is designed to bore crankcases to accommodate JIMS® 4-inch bore cylinders, as well as those used in JIMS® 100”, 113”, and 116” Big Bore and Stroker kits. This tool is compatible with heavy-duty 15-inch drill presses, providing a stable platform for precision boring operations.

Key Features

• Precision Boring: This tool accurately bores Twin Cam® motor cases to accept larger cylinder diameters, ranging from 4-inch to 4-1/8-inch bores.
• Vehicle Specific Design: Engineered for direct application on all Twin Cam® models (A or B) manufactured from 1999 to the present.
• Drill Press Compatibility: Optimized for integration with a heavy-duty 15-inch drill press, ensuring stable and controlled operation.
• Manufacturer Part Number: 1408

Applications

The Twin Case Boring Tool is primarily used in the performance modification of Harley-Davidson Twin Cam® motorcycle engines. It allows for the precise machining of engine crankcases to facilitate big bore conversions, such as installing 4-inch bore cylinders for 100”, 113”, or 116” stroker kits. This tool empowers motorcycle mechanics and serious enthusiasts to perform critical engine upgrades, transforming stock Twin Cam® cases to support higher displacement cylinder kits and achieve greater engine performance.

Benefits

• Cost-Effective Performance Upgrades: Enables in-house case boring, eliminating the need for expensive machine shop services and potentially saving significant time and money on big bore engine builds.
• Enhanced Engine Building Capability: Provides the capability to precisely bore Twin Cam® engine cases, removing guesswork and ensuring proper fitment for larger cylinders.
• Increased Power Potential: Facilitates the installation of high-performance cylinder kits, allowing for the construction of 100” to 124” Twin Cam® big bore motors and unlocking greater horsepower and torque.
• Professional Results: Delivers accurate and consistent case boring, leading to reliable and professional-grade engine assembly outcomes.