Complete Guide to Installing HITLIS on Your YZ250
If you're looking to install HITLIS on your YZ250, this guide provides a step-by-step breakdown to ensure a smooth and effective installation. This walkthrough covers everything from disassembly to final setup, making it accessible to riders of all mechanical skill levels.
For those interested in enhancing throttle response and eliminating power valve flutter, HITLIS offers a revolutionary solution that fine-tunes power delivery for optimal performance.
Step 1: Preparing for Installation
- Gather essential tools (6mm, 8mm, 10mm sockets, wrenches, pliers, a hooked pick).
- Drain the coolant and oil before beginning the process.
- Remove the seat, fuel tank, kick lever, and front pipe to access the governor assembly.
Step 2: Removing the Stock Power Valve System
- Disassemble the radiators and covers to access the power valve components.
- Take off the governor linkage and inspect for wear.
- Remove the power valve shaft, springs, and washers—noting their order for reinstallation.
Step 3: Setting Up the Governor for HITLIS
- Use the provided washers and thrust bearings to correctly set up the governor linkage.
- Adjust the spring preload based on riding conditions (0.8mm for desert setup, 0.9mm for woods setup).
- Mark key alignment points before reassembling the governor for precise gear meshing.
Step 4: Installing the HITLIS System
- Assemble new pulleys, springs, and washers onto the power valve shaft.
- Ensure proper positioning of the linkage arms and torsion springs.
- Tighten all components while maintaining silky smooth movement.
Step 5: Reassembling & Final Checks
- Reinstall the side case, kick lever, and pipe while ensuring proper gear alignment.
- Fill the bike with fresh coolant and oil before testing.
- Verify that the power valve movement is smooth and correctly engaged.
Once installed, take the bike for a ride to evaluate the power delivery. If necessary, adjust the governor settings for fine-tuning.