Japanese mini trucks (or Kei trucks) have become wildly popular across the globe for their utility, simplicity, and rugged charm. Whether you’re using yours for farm work, off-road trails, or as a weekend project, one of the best upgrades you can make is to the suspension.
In this beginner’s guide, we’ll break down everything you need to know about suspension modifications and lift kits for Kei trucks—in plain English, without the technical overload.
🚙 What’s a Kei Truck?
Kei trucks are small, lightweight utility trucks designed to comply with Japan’s Kei car regulations. They’re usually:
4WD or RWD
Powered by a sub-660cc engine
Extremely fuel-efficient
Compact and maneuverable
Popular models include:
Suzuki Carry
Daihatsu Hijet
Honda Acty
Subaru Sambar
Mitsubishi Minicab
🛠️ Why Modify the Suspension?
The stock suspension on Kei trucks is designed for light-duty street and farm use in Japan. If you’re using your truck for:
Off-roading
Rural work
Hauling heavier loads
Or just want a cooler stance
Then a suspension upgrade is a smart first step.
🧩 Types of Suspension Mods for Kei Trucks
1. Lift Kits
Raise the height of the truck, allowing for:
Larger tires
More ground clearance
Improved off-road ability
2. Shock Absorber Upgrades
Better ride quality
Less bounce on uneven terrain
Increased load capacity
3. Leaf Spring or Coil Spring Upgrades
Prevent sagging when carrying heavy loads
Provide a stiffer or softer ride depending on your needs
4. Camber Correction Kits
After lifting, your wheels may tilt inward or outward
These kits help maintain correct wheel alignment
🔧 Suspension Lift Kits: What Are Your Options?
Most Kei truck owners go with one of these:
| Lift Size | Ideal For | Notes |
|---|---|---|
| 1.5” (35–40mm) | Light off-road, casual use | Safe, minimal wear |
| 2” | Mixed use, off-road and utility | May need camber correction |
| 3” or more | Extreme off-road, show builds | Higher risk of component stress |
📦 What’s in a Typical Lift Kit?
Depending on the kit, you might get:
Coil spring spacers
Extended shackles (rear)
Camber bolts or correction plates
U-bolts and mounting hardware
Optional: extended shocks or brake line brackets
🧰 What You’ll Need to Install a Lift Kit
Floor jack & jack stands
Socket wrench set
Torque wrench
Spring compressor (for coil spring kits)
Patience (and possibly a friend!)
Pro Tip: Always get an alignment after installing a lift kit.
⚠️ Common Mistakes Beginners Make
| Mistake | What Happens |
|---|---|
| Going too high too fast | Stresses axles, steering, and suspension |
| Skipping alignment | Causes uneven tire wear and poor handling |
| Cheap or universal kits | May not fit your truck properly |
| Not adjusting camber | Leads to tracking problems and tire issues |
🏆 Recommended Beginner Lift Kits
| Brand | Fits | Lift | Why We Like It |
|---|---|---|---|
| Acty Dream 1.5″ Kit | Hijet S500P/S510P | 1.5” | Great quality, easy install |
| KeiTruckSupply Adjustable Kit | Carry, Hijet, Acty | 2” | Camber-friendly and flexible |
| MiniTruckUSA 2” Kit | Most Kei models | 2” | Includes stronger rear springs |
| Midwest Overland Universal Kit | Most 1990s–2010s trucks | Up to 2” | Affordable and simple |
🛞 What About Tires?
Lifting allows for larger, more aggressive tires:
Stock: ~22” diameter
2” lift: Fit up to ~23.5–24” comfortably
Watch for rubbing; you might need to trim or roll fenders
🔄 Before & After: What to Expect
| Feature | Before | After Lift |
|---|---|---|
| Ride height | Low | Taller stance |
| Tire size | Small | Bigger options |
| Ride quality | Soft | Slightly firmer (with good shocks) |
| Off-road ability | Limited | Greatly improved |
| Looks | Basic | Rugged & custom |
✅ Final Tips for First-Time Modders
Start with a 1.5–2” lift — safer and easier on components.
Always choose a kit made for your exact truck model.
Upgrade shocks and bushings if possible.
Don’t forget the alignment.
Document the process (you’ll thank yourself later).
👋 Final Thoughts
Kei truck suspension mods are one of the most rewarding DIY upgrades you can do. Whether you’re lifting for function, form, or both — starting small, staying safe, and using quality parts will make all the difference.
🚗 Want Help Choosing a Kit?
Drop your Kei truck’s:
Make (e.g., Suzuki, Daihatsu)
Model & year
How you plan to use it (off-road, city, work)
And we’ll recommend a beginner-friendly lift kit and parts list.