Harley-Davidson
What tools do I need for a Harley-Davidson?
Updated 2026-08-09
The honest answer for a Harley-Davidson is short: SAE (inch) spanners and sockets in 1/2", 9/16", 5/8", 3/4", 1-1/8", hex keys in 3/16", 1/4", 5/16", T25, T27, T40, T45 Torx bits, a Phillips cross-head driver, and a tyre repair kit that matches your wheels. Wheels are tubeless, so a plug kit and a way to re-inflate fix almost every puncture without taking a wheel out. Final drive is belt: no chain tools, and no roadside belt repair either, so that weight goes into tyre repair and electrics.
Inch-sized (SAE) fasteners on most models — a metric set will slip and round heads. T27 Torx is common, and a T25 driver will feel loose in it.
Everything below is derived from that profile rather than from a generic tool list. The headline kit on this page is the road touring list — 35 items, 7.7 kg — because that is what most of this brand's range is built for; the four other riding styles are linked further down.
Fastener sizes on a Harley-Davidson
Harley-Davidson bikes are built with inch-sized fasteners, which is the single most expensive mistake to get wrong: a metric socket dropped onto an inch bolt feels almost right, slips under load and rounds the head. Carry an SAE set and leave the metric one at home.
The axle nuts are the exception to every generic list. They are usually the two largest sizes on the bike, they vary by model and year even within this brand, and without the right one you cannot pull a wheel — which means you cannot fix a flat. Measure both axles with a caliper before you buy anything.
- — Spanners and sockets: 1/2", 9/16", 5/8", 3/4", 1-1/8"
- — Hex (Allen): 3/16", 1/4", 5/16"
- — Torx: T25, T27, T40, T45
- — Cross-head: Phillips
- — Axle nuts: measure yours — they are inch-sized on most of this brand's models and larger than anything else in the kit
Cross-head screws and bit drivers
Cross-head screws on a Harley-Davidson are Phillips, so a standard Phillips bit is the correct fit and there is no JIS trap to fall into.
What does catch people out is how much of the bike is Torx rather than cross-head or hex. Bodywork, brackets and often brake discs use T25, T27, T40, T45, and forcing a hex key into a Torx socket chews it into a hole nothing will grip.
Tyre repair: plug it and ride
Harley-Davidson bikes are tubeless, which is the easy case. A nail hole is a ten-minute roadside repair with a rasp, a sticky string or mushroom plug and something to put air back in — the wheel never comes off the bike.
Because you are not carrying levers and a tube, put that weight into inflation instead. A small 12V compressor beats CO2 cartridges on anything longer than a day ride, because it does not run out and it lets you air down and back up at will.
- — Plug kit: rasp, insertion tool, five plugs or vulcanising strips
- — 12V compressor (or 3–4 CO2 cartridges if the kit rides on your body)
- — Pressure gauge and spare valve cores
- — Pliers to pull the nail out
Belt drive: nothing to carry, everything to inspect
Harley-Davidson bikes use a belt final drive, so a chain breaker, master link and chain lube are dead weight. Delete all three.
The trade-off is that a shredded belt is not a roadside repair at all. Inspect it for cracks, missing teeth and embedded stones before a long trip, replace it on schedule, and know who you would call — that recovery plan is the belt-drive equivalent of a spare master link.
Combustion and electric models need different spares
This brand sells both combustion and electric machines, and the spares list is not the same. On the combustion bikes carry a pre-gapped spare plug, a plug socket and a little oil; on the electric ones delete all of that and carry charging adapters instead.
The tools, tyre kit and hardware are identical either way — it is only the engine-side consumables that change.
What catches Harley-Davidson owners out
These are the details that change what you pack, drawn from the same profile the kit builder uses.
- — Carry an SAE spanner/socket set, not metric. A 1/4in SAE bolt is nearly an M6, and mixing them strips threads.
- — Belt final drive: no chain tools, but a belt is not roadside-repairable — inspect it before departure and know your recovery options.
- — Pan America is metric and chain-driven, unlike the rest of the range — treat it as its own bike.
- — Cast wheels are tubeless: a plug kit plus a compressor is the right tire strategy.
Do the five-minute audit before you buy anything
The sizes on this page are what Harley-Davidson bikes typically use, not a promise about your specific model and year. Walk around the bike with a set of keys and a marker and write down what you actually find; it takes five minutes and it is what turns a 3 kg kit into a 1 kg one.
Then do a dry run: pull both wheels and adjust the rear suspension preload in the driveway using only the kit you plan to carry. Anything you had to walk to the toolbox for goes in the roll; anything you never touched comes out.
- — Front and rear axle nuts, and the pinch bolts that hold them
- — Rear wheel and final-drive fasteners
- — Bodywork and engine-cover screws — note whether they are cross-head, hex or Torx
- — Bar clamps, lever perches, mirrors and screen
- — Spark plug size, and the seat or panel bolts you remove to reach the battery
The kit for a Harley-Davidson, item by item
Torx bit set — T25, T30, T40, T45
T25, T27, T40, T45 are the sizes that appear on these bikes.
Add T50/T55 as a socket if your bike uses Torx axle or caliper bolts.
Where to buy:Amazon
1/4in ratchet + sockets (8, 10, 12, 13, 14 mm)
Load it with 1/2", 9/16", 5/8", 3/4", 1-1/8" rather than the sizes the set came with.
A stubby ratchet plus a short extension packs smaller than a full socket set. Add a 1/4in-to-hex-bit adapter to share the ratchet with your bits.
Where to buy:Amazon
Axle nut wrench / socket for your bike
The one tool you cannot improvise. Measure both axles on your own bike first.
Check both axles with a caliper before you leave. Combined tire-iron/axle-wrench levers save weight.
Where to buy:Amazon
Headlamp (hands-free)
Every breakdown eventually happens in the dark or under the bike.
Where to buy:Amazon
Hex (Allen) key set — 3, 4, 5, 6, 8 mm
3/16", 1/4", 5/16" is the working range on this brand.
Ball-end long-arm keys, or 1/4in hex bits plus a driver if you already carry a ratchet.
Where to buy:Amazon
Pliers with side cutters
Cut safety wire, pull clips, and grip the head you just rounded.
Where to buy:Amazon
Reversible screwdriver — JIS/Phillips + flat
A Phillips bit plus a flat covers the bodywork and clamps.
A 1/4in bit driver with JIS #2, PH2 and a 5 mm flat covers everything.
Where to buy:Amazon
Tire pressure gauge
Cheapest handling and puncture-resistance upgrade there is.
Where to buy:Amazon
Tubeless plug kit (sticky strings or mushroom plugs)
The highest-value item on a tubeless bike: a nail hole fixed without pulling the wheel.
Rasp + insertion tool + 5 plugs. Vulcanising strips are more durable than cheap rubber strings.
Where to buy:Amazon
Spare spark plug (pre-gapped)
Light, cheap, and the difference between riding out and being towed after a drowning.
Where to buy:Amazon
Spare fuses (full set of your bike's ratings)
A blown main fuse looks exactly like a dead bike, and weighs nothing to fix.
Check the fuse box lid for ratings; carry two of each plus the fuse puller.
Where to buy:Amazon
Duct tape (wrapped, not the roll)
Wrapped around a T-handle or a pen barrel so you leave the roll behind.
Where to buy:Amazon
The same bike, five ways to ride it
Each list is already filtered for this brand's fasteners, wheels and final drive. The counts and weights below are what you would actually carry.
Questions riders ask
- What tools do I need for a Harley-Davidson?
- Start with SAE (inch) spanners and sockets in 1/2", 9/16", 5/8", 3/4", 1-1/8", hex keys in 3/16", 1/4", 5/16", T25, T27, T40, T45 Torx bits, a Phillips cross-head driver, pliers and the correct axle wrench. Add tyre repair that matches your wheels, fuses, zip ties and threadlocker. The road touring list on this page comes to 35 items and 7.7 kg.
- Is a Harley-Davidson metric or SAE?
- Harley-Davidson bikes use inch-sized (SAE) fasteners, so a metric set will slip and round the heads. Carry SAE spanners and sockets in 1/2", 9/16", 5/8", 3/4", 1-1/8", and keep the metric set at home so the two never get mixed up in the same roll.
- Does a Harley-Davidson need a plug kit or a spare tube?
- A plug kit. Harley-Davidson bikes are tubeless, so a rasp, plugs and a compressor repair a puncture in about ten minutes with the wheel still on the bike.
- Which Torx sizes does a Harley-Davidson use?
- T25, T27, T40, T45 are the sizes worth carrying. Torx typically shows up on bodywork, brackets and brake discs, and a hex key forced into a Torx socket will destroy it.
- Do I need a chain tool on a Harley-Davidson?
- No. Harley-Davidson bikes use belt final drive, so a chain breaker, master link and lube are dead weight. A damaged belt is not a roadside repair, so inspect it before you leave.
- Is the tool kit that came with a Harley-Davidson enough?
- Rarely. The OEM kit is worth keeping for the axle wrench and any brand-specific pieces, but the stamped spanners flex under real torque and the screwdriver slips. Keep those pieces, add a compact ratchet with the sizes above, a proper driver, pliers and tyre repair, and you have a kit you would actually be happy using.