AirTech Series · Honda Grom & Kawasaki Z125
Less dive.
No bottoming.
Stock Grom forks dive under braking and slam into their stops on landings. AirTech is an air spring and polymer bump stop that slides onto your stock fork, so the front holds up while small bumps stay soft. 30–45 minutes, and the fork stays on the bike.
- Ships within 1 day
- Fork stays on the bike
- 90-day warranty
- vs. stiffer springs ›
Built for stoppies and landings
Hold the stoppie. Land the drop.
With less dive, rolling stoppies are easier to hold. And hard landings don't bang the fork into its stops.
That's our own Grom on AirTech, rolling a stoppie and swinging it around. The same bike runs our solid bar-clamp bushings, so the bars stay put under hard braking.
"Can confidently say the air springs make a big difference."
"We just installed these on 3 different Groms and I'm blown away."
Your options
Less than a set of springs.
What Grom riders usually try, side by side. Prices are rough, for the parts.
| Cost | Install | Less dive | Stops bottoming | Soft over small bumps | |
|---|---|---|---|---|---|
| Stock fork | – | – | No | No | Yes |
| Heavier fork oil | ~$20–35 | An afternoon, fork apart | Partly | Partly | Harsher |
| Stiffer springs | ~$135–150 | Fork apart | Yes | Partly: big hits still bottom | Harsher everywhere |
| Cartridge kite.g. Öhlins mini cartridge | ~$250–300, plus tools | Fork rebuild | Yes | Yes | Yes |
| AirTech | Original price was: $40.$30Current price is: $30. | 30–45 min, fork stays on | Yes | Yes, then a polymer stop | Yes: nothing until sag |
Choose your setup
Two stiffnesses. Black or white.
- Standard Riders under about 200 lb.
- Extra Firm Riders over about 200 lb, or Groms with an engine swap (300 cc and up).
- Fitment A dedicated version each for the Honda Grom and the Kawasaki Z125. Pick your bike below.
- Install 30–45 minutes for both fork legs, with basic hand tools.
- Protects the chrome It covers the exposed stanchion, so it keeps grit off and takes scuffs and knocks in a tip-over or crash.
- Wear item Like tires or brake pads. About 6 months of hard stunting, or about a year of aggressive street riding.
- Shipping Ships within 1 day from Phoenix. US delivery usually takes 4–5 days.
Not just for stunts
Rough ground, too.
The same Grom at speed on a loose desert trail. AirTech's support builds the deeper the fork goes, so small stuff stays smooth and the bigger hits don't bottom the fork out.
Install
About 30–45 minutes.
⚠ Reverse thread. Looking up at the fork lower from underneath, turn it clockwise to remove it. (From above, that's counterclockwise.) Turning it the other way tightens it.
- Lift the front of the bike, then remove the brake caliper, the front fender and the front wheel. The fork stays on the bike.
- Fit the included soft-jaw adapters, put a C-clamp over them, and heat the fork lower with the torch moving until the factory threadlocker lets go.
- Unscrew the fork lower clockwise, as seen from underneath, slide AirTech on with its clip, then refit the lower with blue threadlocker.
- Repeat on the other leg, refit the fender, wheel and caliper, and pump the brake before riding.
See inside
How AirTech works, ring by ring.
Scroll through the film: the air spring, the damping and the bump stop.
Less dive.
No bottoming.
An air spring, damper and bump stop that slides onto your fork.
Six rings of air.
Flexible TPU, printed airtight in one piece. No seals to leak, no oil to change.
Fits the fork you have.
A dedicated version each for the Grom and the Z125. 30–45 minutes with basic hand tools.
Working from the moment you sit on it.
AirTech starts 33 mm into the stroke, right around where your sag puts the fork. From there it adds support that builds the deeper the fork goes.
The air has to work its way out.
A 3.5 mm zigzag restrictor meters the air in and out, so the fork is damped instead of bouncing back.
Then it becomes a bump stop.
Once the air cells close, the TPU itself takes the hit. Polymer, not metal on metal.
Built for stoppies and landings.
Less dive makes rolling stoppies easier to hold, and hard landings don't bottom the fork out.
Two stiffnesses.
Black or white.
Standard for riders under 200 lb. Extra Firm for heavier riders and engine-swapped Groms.
Original price was: $40.$30Current price is: $30..
Fits the Honda Grom and Kawasaki Z125.
Why not just stiffer springs?
Firm where it counts. Soft where it doesn't.
Stiffer springs firm up the whole stroke, so every small bump gets harsher, and a big hit still bottoms the fork. AirTech leaves the top of the stroke alone. It adds nothing until your sag point, then builds, and ends on a soft polymer stop.
Questions
Good to know.
Will it scratch my stanchions?
No. AirTech is soft TPU, and the included soft jaws protect the stanchion while you install it.
How long does it last?
AirTech is a wear item, like tires or brake pads. The TPU flexes every time the fork moves, so it wears with use. Riders who stunt hard get about six months from a set; aggressive street riding with less stunting, about a year. The warranty covers defects and early failures for 90 days, not normal wear.
Is heating the fork safe?
Yes, as long as you keep the torch moving and don't hold the flame in one spot. The fork lower only needs to get hot enough for the factory threadlocker to let go, well below the temperature where powder coat starts to suffer. The fork seals sit away from the heat, so they're not at risk.
Does it protect the fork?
Yes. The chrome stanchion is the most easily damaged part of the fork, and AirTech covers the exposed section. It's sealed, so it keeps grit and road grime off, and the soft TPU takes the scuffs and knocks in a tip-over or crash that would otherwise nick the chrome. It won't save a fork from a hard impact, but it's a lot cheaper to replace than a stanchion.
Does it change my ride height?
Not for most riders. AirTech starts working 33 mm into the stroke, which is about where the fork sits under a typical rider. If you're heavy enough that your sag goes past 33 mm, AirTech carries some of your weight, and the front can sit up to about 10 mm higher, depending on your sag.
Does it work with aftermarket springs?
Yes. Fork springs live inside the fork tube, and AirTech mounts on the outside of the stanchion, so it works with stock or aftermarket springs.
Will it fit my Honda Monkey or Super Cub?
If your bike uses the same fork as the Grom, the Grom version should fit. We're still confirming fork part numbers, so ask us before ordering for anything other than a Grom or Z125.