The Sur-Ron Light Bee X has become the benchmark electric dirt bike for trail, track, and pump track riding. The stock spec is solid — Tektro Auriga hydraulic brakes, 60V 32.5Ah Samsung battery, 6kW mid-drive motor — but after a season of riding, most owners start looking at what can be improved.
This guide covers the upgrades that actually make a difference, in order of priority. We've verified fitment on every part listed, with prices and where to buy each one.
1. Brake System
The stock Tektro Auriga pads are organic and perfectly adequate for casual trail riding. They start to show limitations under repeated hard braking — the compound glazes and fade sets in. This is the first upgrade most serious riders make.
Brake Pads
Galfer E-Bike Compound ($32.99) — Galfer's e-bike specific compound is engineered for heavier bikes that generate more heat at the rotor. Compared to the stock organic pads, you get better initial bite, more consistent performance as the pads heat up, and longer life in wet conditions. This is the right pad for trail riding and pump track.
Galfer Pro Compound ($34.99) — Sintered metal compound. Better than the E-Bike pads under hard, repeated braking and in mud — the trade-off is they're harder on rotors over time and need a longer bedding-in period. Right choice for aggressive trail or any track use.
Both Galfer compounds are direct drop-in replacements for the Tektro Auriga — no hardware changes needed.
Rotor Upgrade
Galfer 223mm Wave Rotor ($62) — Upgrading the front from 203mm to 223mm adds meaningful mechanical advantage at the lever. Combined with sintered pads, this makes the front brake feel like a different bike. You'll need a +20mm post mount adapter to run this rotor — the adapter costs about $20 and bolts directly to the stock caliper mount.
The wave (petal) rotor design isn't just cosmetic: the cutouts reduce unsprung weight and improve heat dissipation. On a bike this light, every gram of spinning mass matters.
2. Wheels and Tires
The stock Sun Ringle rims are fine for moderate use, but they're heavy and the stock spokes have a reputation for loosening up after hard use. If you're running supermoto, track days, or you've dinged a rim, a complete wheel upgrade is worth considering.
Complete Wheel Set
KKE Complete MX Wheel Set ($629) — KKE is the most popular complete wheel upgrade for the Light Bee X. The set comes with aluminum rims, stainless spokes, CNC hubs, and the correct bearings pre-installed. Available in MX sizing (19" front / 16" rear) or supermoto sizing. The weight saving over stock is noticeable on the track, and the build quality is considerably better than OEM.
Tire fitment on the Light Bee X:
- 19" front: 70/100-19 or 80/100-19 (same as many 65-85cc mini motos — broad selection available)
- 18" rear: 90/100-18 standard MX sizing
You're not locked to Sur-Ron branded rubber. Bridgestone, Shinko, Dunlop, and IRC all make tires in these sizes that fit without modification.
3. Drivetrain
The #420 chain on the Light Bee X is a commodity — it's the same pitch as a huge number of small displacement motos, which means you have a lot of options when it's time to replace. Stock is 14T front / 46T rear.
Warp 9 #420 Drive Chain ($28) — This is a simple, correct replacement. O-ring or X-ring chains last longer with less maintenance than non-sealed, but they add a small amount of frictional loss. For trail use, either works. For racing, go unsealed and lube frequently.
Chain tension drifts fast on the Light Bee X, especially in the first 20 hours. Get in the habit of checking it every 8–10 hours. The adjuster bolts are M8 x 1.25 — easy to strip if you over-torque them. Snug plus a quarter turn is enough.
4. Cockpit
The stock handlebar position is a common complaint — most riders find it too low and narrow for aggressive riding. Warp 9 makes a direct-stem riser that adds height without requiring new cables, which is the cleanest solution. You can also swap the full bar.
ODI lock-on grips are a popular upgrade — they're direct fit to the stock bar diameter and won't twist under load the way the stock grips can.
5. Suspension
The Light Bee X ships with RST forks — capable for trail riding, undersprung for aggressive use. Riders over 70kg or anyone doing jumps regularly will notice the forks bottom out without much warning. The quickest fix before going to aftermarket forks is stiffer spring rate (RST/Marzocchi servicing shops can do this) plus correct oil weight.
Fork seals on the Light Bee X are 37mm — same spec as a lot of Chinese mini motos, which keeps replacement costs low. The swap itself takes 30–45 minutes once you've done it once.
6. Protection
The stock plastic skid plate is decorative at best. The motor and battery hang low on the Light Bee X, and anything but groomed trail will test the underside regularly. An aluminum skid plate (3–4mm minimum) is not optional if you're riding real terrain.
Upgrade Priority Summary
If you're building a priority list:
- Brake pads — biggest safety impact, lowest cost. Start here.
- Chain maintenance — check tension and lube every 8–10 hours or the sprockets pay for it.
- Front rotor upgrade — meaningful improvement in braking leverage for $62 + adapter.
- Wheel set — if you've bent a rim or want supermoto, KKE is the go-to.
- Skid plate — the moment you start riding anything with rocks.
All parts listed above are in stock and ship from US warehouses. See the full Sur-Ron Light Bee X parts catalog for the complete list including OEM replacements.