Do the checks before the first start, not after. A bike that has sat for six months can have a seized brake caliper, a perished tyre, a mouse nest in the airbox and fuel that will not burn properly, and none of those announce themselves once the engine is running and you are half a mile down the road. Work through it in a fixed order: fluids and fuel, brakes, tyres, chain, electrics, then a start, then a slow shakedown ride with the brakes tested at walking pace before anything else. The whole thing takes under an hour and it is the difference between a good first ride of the season and a recovery truck.
Before you touch the starter
- Look underneath and behind. Fresh oil or coolant on the floor, and any nesting material near the exhaust, airbox or under the seat. Rodents chew wiring, and a chewed loom found now is a repair rather than a fire.
- Check the airbox and the exhaust outlet. If you blocked them, unblock them. If you did not, look inside anyway.
- Oil level and condition. Milky oil means water, and that needs investigating before the engine runs. If the oil was not changed before storage, change it now rather than circulating months-old acidic oil through the bearings.
- Coolant level and colour. Rusty coolant means the corrosion inhibitors are spent.
- Brake fluid level and colour. Dark fluid has absorbed water. Check the date it was last changed against the manual's interval — this is one of the few maintenance items governed by time rather than mileage.
- Fuel. If it has been in there more than about six months without stabiliser, treat it as suspect. Smell it: stale petrol has a distinctly sour, varnish-like note that is unmistakable once you have met it.
- Battery. Charge it fully off the bike if you can, then check it holds voltage after a few hours disconnected. A battery that reads well on the charger and collapses when a load is applied is finished.
- Tyres. Pressures first, then a close look at the sidewalls and tread grooves for cracking, and a check for flat spots by rolling the bike slowly.
The checks that most often find something
| Item | What to look for | Why it happens in storage | What to do |
|---|---|---|---|
| Front and rear brakes | Caliper pistons not retracting, a lever that feels wrong, discs with a ridge of surface rust | Pistons corrode in their bores; pads bond lightly to discs | Light surface rust rides off in the first few stops; a dragging or seized caliper is a workshop job before you ride |
| Tyres | Cracking in the tread grooves and sidewall, flat spots, pressure loss | Rubber ages and the carcass sets under constant load | Cracking means replacement; flat spots often work out after a few miles but not always |
| Fuel system | Hard starting, hunting idle, poor throttle response, a fuel pump that sounds different | Oxidised petrol leaves gum in jets and injectors; ethanol may have separated | Drain and refill with fresh fuel; persistent symptoms need the carburettor or injectors cleaned |
| Chain | Surface rust, tight spots when you rotate the wheel, slack out of specification | Moisture sits on a stationary chain in one position | Clean, lubricate, re-check slack; tight spots that persist mean the chain is worn out |
| Battery and charging | Slow cranking, voltage that drops sharply under load | Self-discharge and sulphation over months | Full charge and a load test; replace rather than nurse a battery that fails one |
| Clutch | Plates stuck together, so the bike lurches when you select first with the lever pulled in | Wet clutch plates bond after months without oil circulation | Usually frees with the engine running and the lever worked; persistent sticking needs the clutch inspected |
| Cables and controls | Stiff throttle, sticky levers, a throttle that does not snap shut | Cable lubrication migrates and corrosion starts at the ends | Lubricate and check free play; a throttle that does not return is a stop-immediately fault |
| Lights and electrics | Dead bulbs, corroded connectors, indicators flashing at the wrong rate | Damp gets into connectors over a winter | Check every lamp and both brake switches; clean and grease suspect connectors |
Fuel that has been sitting
Fresh petrol is the cheapest fix on this list. If the bike was stored with stabilised fuel in a nearly full tank, top it up with fresh and ride. If it was stored with untreated fuel, particularly an ethanol blend, drain what is in the tank and start again — E10 is ten percent ethanol and the ethanol fraction is what absorbs water and separates, leaving a watery layer sitting exactly where the fuel pickup is.
Symptoms of stale fuel are consistent: it starts hard, idles unevenly, feels flat on part throttle and sometimes clears up as you ride and then returns at the next start. On a carburetted bike the pilot circuit blocks first because its passages are smallest, so the symptom is worst at idle and small throttle openings. On an injected bike a partially blocked injector shows up as a misfire under load. Neither improves with more riding, and running the tank dry to "use it up" mostly means dragging the worst of it through the system.
One thing worth checking on any bike stored for a long time is the fuel filter and, on older machines, the inside of the tank. Rust flakes from a steel tank block filters and pumps, and finding them now is much cheaper than finding them at the roadside.
The battery, and telling a tired one from a flat one
A battery that has been on a smart maintenance charger all winter is usually fine. One that was left connected and untouched usually is not, and the distinction matters because a battery can read a perfectly respectable voltage and still be incapable of turning the engine over. Voltage tells you state of charge; it tells you almost nothing about capacity.
The useful test is behaviour under load. Charge it fully, disconnect the charger, and leave it for several hours — a healthy battery holds its resting voltage, while one that has sulphated over months drops steadily on its own. Then crank the engine and watch what the voltage does: a battery that collapses under starter load and recovers as soon as you release the button has lost capacity rather than charge, and no amount of further charging brings it back.
Two related things are worth checking at the same time. Terminals corrode over a damp winter, and a green or white deposit on a terminal adds enough resistance to mimic a failing battery — clean them, refit them properly and apply a smear of grease. And check the charging system once the engine is running, because a bike that has been standing may have a regulator or a stator that failed at the end of last season and was never noticed. If the battery goes flat again within a week of a full charge, the fault is on the bike rather than in the battery, and our battery drain diagnosis guide covers finding it.
The first ride back
Treat it as a shakedown rather than a ride. Before leaving the driveway, roll the bike forward and apply the front brake, then the rear, at walking pace. You are checking that they bite evenly and release cleanly. A brake that drags will heat the disc noticeably within a couple of miles — put your hand near, not on, the disc after a short ride to check.
Then ride slowly for the first few miles with no traffic behind you, and pay attention to steering feel and any thumping from the wheels. Tyre flat spots usually fade as the rubber warms; a thump that does not fade is a set tyre or a wheel problem. Take the first hard stop somewhere empty rather than assuming the brakes are as good as you left them.
After twenty or thirty kilometres, stop and check the things you touched: fastener security, chain slack, pressures, and whether anything is leaking. Then re-check the tyre pressures once more when they have cooled, because storage pressure and running pressure are different things. Our tyre pressure guide covers the placard values, and a Bluetooth TPMS sensor takes the guesswork out of the first few rides when a valve may have been disturbed.
What to hand over rather than ride on
Brakes come first. A caliper that drags, a lever that goes soft, fluid that is dark, or a disc with more than superficial surface corrosion is not something to test on the road. Brake defects are graded severely in roadworthiness inspection for good reason — the DVSA inspection manual for motorcycle brakes sets out how insecure, contaminated and ineffective components are categorised, and it is a fair benchmark anywhere.
Tyres are the second. Age cracking in the tread grooves or sidewall is not something that improves, and the DVSA manual for wheels, tyres and suspension covers how cracking, distortion and damage are assessed. Our guide to reading tyre wear helps with the judgment call, and if the bike sat for a year or more, the tyres may be beyond their useful life regardless of tread depth.
Anything electrical that was chewed, anything fuel-related beyond a drain and refill, and any noise from the engine that was not there before should go to a technician. If a fault code appears at the first start, work out what it is before riding — our fault code guide covers reading them. And once everything is signed off, fold this into a routine pre-ride check for the rest of the season. Use the intervals and figures in your own owner's manual and factory service manual throughout.
FAQ
What should I check before starting a motorcycle after winter storage?
Oil level and condition, coolant, brake fluid, fuel condition, battery charge, tyre pressures and sidewalls, and a look for rodent damage in the airbox and around the loom. Do all of it before the first start, because most of these are much harder to assess once the bike is running.
My brakes feel like they are dragging after storage — is that normal?
Light surface rust on the discs is normal and rides off in a few stops. Actual dragging is not: caliper pistons corrode in their bores over months, and a dragging caliper heats the disc quickly. Get it looked at before riding rather than hoping it frees up.
Should I drain old fuel after storage?
If it went in untreated and has been there more than about six months, yes. Ethanol blends absorb water and can separate, and oxidised petrol leaves gum in jets and injectors. Stabilised fuel in a nearly full tank is usually fine to top up and ride on.
My clutch is stuck after storage — what now?
Wet clutch plates can bond together after months without oil circulation, so the bike lurches when you select first with the lever pulled in. It usually frees with the engine running and the lever worked while the bike is held on the brake. If it does not, stop and have the clutch inspected.
Do tyre flat spots go away?
Often, once the rubber warms up over the first few miles. Sometimes they do not, particularly after a long storage on cold concrete with the tyres underinflated. A thump that persists after the tyres are warm means the carcass has set, and the tyre needs replacing.
