This guide walks you through installing, tuning, and maintaining the Griffin Dexter 2018 YZ450F Time Yamadog—a precision timing tool designed to boost engine efficiency and throttle response. Whether you’re a weekend warrior or competitive racer, you’ll learn how to unlock your YZ450F’s full potential with expert tips and step-by-step instructions.
Key Takeaways
- Understand the Yamadog’s Purpose: The Griffin Dexter Time Yamadog is a timing adjuster that fine-tunes ignition timing for improved throttle response and power delivery on the 2018 YZ450F.
- Proper Installation is Critical: Correctly mounting and aligning the Yamadog ensures accurate timing adjustments and prevents engine damage.
- Baseline Timing Matters: Always verify factory timing before making adjustments to avoid over-advancing or retarding the ignition.
- Test and Tune Gradually: Make small timing changes and test ride after each adjustment to find the optimal setting for your riding style and conditions.
- Regular Maintenance Extends Life: Clean and inspect the Yamadog and related components regularly to maintain peak performance.
- Use a Timing Light for Accuracy: A quality timing light is essential for verifying adjustments and ensuring precision.
- Consult a Mechanic if Unsure: If you’re not confident in your mechanical skills, seek professional help to avoid costly mistakes.
Introduction: What Is the Griffin Dexter Time Yamadog?
If you’re riding a 2018 Yamaha YZ450F and looking to squeeze every bit of performance from your engine, the Griffin Dexter Time Yamadog might be the upgrade you’ve been missing. This compact but powerful timing adjuster allows you to fine-tune your bike’s ignition timing for better throttle response, smoother power delivery, and improved overall performance. Whether you’re racing motocross, tackling enduro trails, or just enjoying weekend rides, the Yamadog gives you control over one of the most critical aspects of engine tuning.
In this guide, we’ll walk you through everything you need to know about the Griffin Dexter 2018 YZ450F Time Yamadog—from installation and setup to tuning and maintenance. You’ll learn how to use this tool safely and effectively, so you can get the most out of your YZ450F without risking engine damage. By the end, you’ll be confident in adjusting your bike’s timing like a pro.
What You’ll Need Before Starting
Before diving into the installation and tuning process, make sure you have the right tools and parts on hand. Here’s a quick checklist:
- Griffin Dexter Time Yamadog kit (specific to 2018 YZ450F)
- Timing light (preferably a digital inductive type)
- Socket set (8mm, 10mm, 12mm)
- Torque wrench
- Screwdrivers (Phillips and flathead)
- Clean rags and brake cleaner
- Marker or paint pen (for marking timing points)
- Service manual for 2018 YZ450F (highly recommended)
Having these tools ready will make the process smoother and help you avoid mistakes. Safety is also important—always work in a well-ventilated area and wear protective gloves and eyewear.
Step 1: Prepare Your Bike
Before installing the Yamadog, you need to prepare your YZ450F for timing adjustments.
Warm Up the Engine
Start your bike and let it run for 5–10 minutes to bring the engine to operating temperature. This ensures that all components are expanded to their normal working size, which is important for accurate timing readings.
Turn Off and Cool Slightly
After warming up, turn off the engine and let it cool for a few minutes—just enough so you can safely work on it without burning yourself. You want the engine warm, not hot.
Remove the Seat and Tank (If Necessary)
On the 2018 YZ450F, you may need to remove the fuel tank to access the ignition timing components. Use your socket set to remove the bolts holding the tank in place, then carefully lift it off and set it aside. Be sure to disconnect the fuel line and cap it to prevent spills.
Step 2: Locate the Ignition Timing Components
The YZ450F uses a flywheel magneto system, and the timing is adjusted by rotating the stator plate. Here’s how to find it:
Find the Flywheel and Stator
The flywheel is located on the left side of the engine, behind the cover. Remove the stator cover using a socket wrench. Inside, you’ll see the stator (a circular plate with wires) and the flywheel (a large metal wheel with magnets).
Identify the Timing Marks
Look for timing marks on the flywheel and stator. The factory mark is usually a “T” or “0” on the flywheel that aligns with a corresponding mark on the engine case. Use a marker to highlight these marks so they’re easy to see during adjustment.
Step 3: Install the Griffin Dexter Time Yamadog
Now it’s time to install the Yamadog, which replaces or modifies the stock timing adjustment system.
Remove the Stock Timing Adjuster (If Present)
Some YZ450F models come with a basic timing adjuster. If yours does, carefully remove it using the appropriate tools. Keep all bolts and washers in a safe place.
Mount the Yamadog
Follow the instructions included with your Griffin Dexter kit. Typically, the Yamadog attaches to the stator plate and allows you to rotate it slightly to advance or retard timing. Secure it using the provided bolts and a torque wrench—don’t overtighten, as this can damage the threads.
Verify Alignment
Once installed, rotate the engine slowly by hand (using the flywheel) and check that the timing marks still align at TDC (top dead center). This confirms the Yamadog is properly seated and not interfering with normal operation.
Step 4: Set Baseline Timing
Before making any adjustments, you need to establish a baseline.
Connect the Timing Light
Attach the timing light to the spark plug wire and clamp it around the plug. Make sure the connections are secure.
Start the Engine and Check Timing
Start the bike and let it idle. Point the timing light at the flywheel and observe the timing mark. It should align with the factory specification—usually around 12–14 degrees BTDC (before top dead center) for the 2018 YZ450F. Refer to your service manual for exact specs.
Record the Reading
Write down the current timing reading. This is your baseline. Any changes you make will be relative to this number.
Step 5: Adjust Timing with the Yamadog
Now you can use the Yamadog to fine-tune your timing.
Loosen the Yamadog Bolts
Slightly loosen the bolts holding the Yamadog in place. This allows you to rotate the stator plate.
Rotate for Advance or Retard
– To advance timing (quicker throttle response, more top-end power), rotate the stator plate counterclockwise.
– To retard timing (smoother low-end power, cooler running), rotate it clockwise.
Make small adjustments—no more than 1–2 degrees at a time.
Tighten and Recheck
After each adjustment, tighten the bolts securely and recheck the timing with your light. Repeat until you reach your desired setting.
Step 6: Test Ride and Fine-Tune
After making adjustments, it’s time to test your work.
Take a Short Ride
Go for a 5–10 minute ride on a safe, familiar trail or track. Pay attention to how the bike feels—especially throttle response, power delivery, and engine temperature.
Evaluate Performance
– Does the bike feel snappier on acceleration?
– Is there any pinging or knocking under load?
– Does it run smoother at low RPMs?
If you hear pinging (a metallic knocking sound), you may have advanced the timing too much. Retard it slightly and test again.
Make Final Adjustments
Based on your ride, make small tweaks until the bike performs optimally for your riding style. Remember: small changes make a big difference.
Troubleshooting Common Issues
Even with careful installation, you might run into problems. Here’s how to fix them:
Timing Mark Won’t Align
If the timing mark doesn’t line up after adjustment, double-check that the Yamadog is installed correctly and the stator plate isn’t binding. Loosen the bolts and reposition if needed.
Engine Won’t Start or Runs Rough
This could mean the timing is too far off. Return to your baseline setting and make smaller adjustments. Also, check for loose connections or damaged wires.
Pinging or Knocking Under Load
This is a sign of over-advanced timing. Retard the timing in 1-degree increments until the noise disappears.
Yamadog Feels Loose
Recheck torque specs and tighten bolts evenly. Use thread locker if recommended by the manufacturer.
Maintenance Tips for Long-Term Performance
To keep your Yamadog and YZ450F running smoothly:
- Inspect the Yamadog and stator every 10–15 hours of riding.
- Clean the flywheel and stator area with brake cleaner to remove dirt and oil.
- Check timing every few months or after major rides.
- Lubricate bolts with anti-seize compound to prevent corrosion.
- Store your bike in a dry place to avoid moisture damage.
Regular maintenance ensures your timing adjustments remain accurate and your engine stays healthy.
Conclusion: Unlock Your YZ450F’s True Potential
The Griffin Dexter 2018 YZ450F Time Yamadog is a powerful tool for riders who want more control over their bike’s performance. By following this guide, you’ve learned how to install, adjust, and maintain your Yamadog for optimal timing and power delivery. Remember, timing is a delicate balance—small changes can have big effects. Always test carefully, listen to your engine, and don’t be afraid to seek help if something doesn’t feel right.
With the right setup, your YZ450F will feel more responsive, powerful, and fun to ride. Whether you’re chasing lap times or just enjoying the trail, the Yamadog helps you get the most out of every ride. Now get out there and ride with confidence!
