The Grom that stopped being a joke
2022 Honda Grom — Paddock transport that turned into its own hobby — cage it, gear it, sort the shock, and stop pretending you're not racing it.
We put this build together from what riders recommend — prices verified Sep 2026.
- T-Rex Racing engine guard crash cageBuy this before your friends ride it, not after. Two drops so far, zero damage, and it doubles as a grab point for loading in the truck.$190
- Unbranded folding adjustable lever pairCheap folding levers because the bike will go down. They fold, they survive, done.$40
- Yoshimura RS-9T Race Series full exhaustIt makes the 125 sound like it means it. Do not run it without sorting fueling — mine popped and ran lean until the controller went in.$800
- Dynojet Power Commander 6The other half of the exhaust purchase. Plug-in piggyback, settings for pipe-plus-filter combos are well documented in the Grom community.$590
- YSS rear shockThe stock shock is the single worst part on a Grom at any speed above parking lot. This is the mod that makes kart-track pace possible.$380
- Fork springs + fork oilSprings matched to an adult rider plus fresh oil. Do it while the front wheel is already off for something else.$110
- Steel rear sprocket (40T, +2) + 420 chainKart tracks are all drive, no top speed. Gives up highway cruising you were never doing on a Grom anyway.$75
How it came together
The Grom was bought for one job: getting across race paddocks and campgrounds without walking. Everyone at the track has one, everyone's is modified, and everyone tells you the same lie I'll tell you now — it's just for the pits. Then someone mentions mini moto night at the local kart track, and the receipts start.
The cage went on first, before any of the fun parts, because the other universal Grom truth is that everyone drops it — usually a friend, usually at walking pace, usually within the first month. Mine has been down twice (once me, once not me) and the cage plus folding levers meant both crashes cost zero dollars. Best money on the sheet.
The exhaust and fuel controller are one purchase pretending to be two: the Yoshimura alone had it running lean and popping on decel, so budget them together, not in sequence. The +2 rear sprocket suits kart-track speeds, and the suspension is where the joke officially dies — the stock shock gives up completely at pace with a full-size adult on board. YSS shock and fork springs turned it from a pool toy into a thing you can genuinely ride hard. I have looked up the MiniGP class rules. I have not yet filled out the form. This is where I am as a person.
Shop this build
Boxed links go straight to a product, at the price we saw on the date shown. The rest are retailer searches. Most of these parts are model-specific, so confirm the exact part number for your year, generation and market before you buy.
| Part | Typical price | Where to buy |
|---|---|---|
| T-Rex Racing engine guard crash cageCrash Protection | $190 | |
| Unbranded folding adjustable lever pairLevers | $40 | |
| Yoshimura RS-9T Race Series full exhaustExhaust | $800 | |
| Dynojet Power Commander 6Tune | $590 | |
| YSS rear shockSuspension | $380 | |
| Fork springs + fork oilSuspension | $110 | |
| Steel rear sprocket (40T, +2) + 420 chainDrivetrain | $75 |
Some links may earn Unstocked a commission at no cost to you. Prices shown are typical street prices — always verify fitment and price at the retailer. Model-specific parts (exhausts, rearsets, bodywork) can run 2–3× between bikes — the sheet shows a typical figure.
Ride your version
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