Every spring we get the same call: "I pulled the cover off, hit the starter and nothing happened." We get it. You want to ride. But 20 minutes of prep now saves you a tow truck call on the Sea to Sky Highway later. This is the same spring motorcycle maintenance checklist we run through on every bike that comes into Syndicate Speed Shop.
Whether you ride a stock Sportster or a full custom chopper, this covers what matters. We have broken it down the same way we work through it in the shop.
Before You Hit the Starter
Battery Check
This is the number one reason bikes won't start after winter. If you had a battery tender or trickle charger connected all winter you are probably fine, but still load test it. A multimeter reading of 12.6V means nothing if the battery drops to 9V under load.
If the battery sat for four or five months with no tender it is almost certainly dead. Don't waste time trying to revive a three-year-old battery. Replace it and move on.
Fuel System
Did you add fuel stabilizer before storage? If yes, the gas is fine. Top it off with fresh fuel and you are good. If you did not use stabilizer and the bike sat with a half tank of old gas, drain it. Old fuel turns to varnish and gums up everything from the petcock to the injectors.
On carbureted bikes, old fuel is a bigger problem. We will cover that in the custom bike section below.
Visual Inspection
Before you try to start anything, get under the bike and look around. Check for oil drips, coolant puddles or anything that looks like it leaked over winter. Look at the wiring for rodent damage. Mice love to chew through wire insulation and air filters. If you see chewed wires, don't start the bike until you trace the damage.
Fluids and Filters
Oil Change
Always change the oil before your first ride, even if you changed it before storage. Oil sitting for months collects moisture and loses its protective film. A fresh oil change with a new filter is the single best thing you can do for your engine.
On a Harley this means the three-hole service: engine oil, primary chain fluid and transmission fluid. If you only do one, do the engine oil. If you can do all three, do all three.
Brake Fluid
Brake fluid is hygroscopic, meaning it absorbs moisture from the air. If your brake fluid is dark or has not been flushed in over two years, do a full brake fluid flush. Clear or light amber fluid is good. Dark brown or black fluid needs replacing. This is not optional. Bad brake fluid means soft brakes.
Coolant
If your bike is liquid cooled, check the coolant level in the overflow tank. Top it off if it is low. If the coolant is more than two years old or looks rusty, do a full coolant flush. Air-cooled riders, skip this one.
Air Filter
Pull the air filter and check it. If a mouse made a nest in your air cleaner (we have seen it) you obviously need a new filter. Even without rodent damage, inspect for dirt buildup and clean or replace as needed.
Tires and Brakes
Tire Pressure
Check tire pressure PSI cold, first thing in the morning. Match the specs on your frame sticker or swingarm decal. Tires lose pressure sitting over winter and riding on underinflated tires is dangerous, especially on that first ride when you are shaking off the rust.
Flat Spots and Dry Rot
If the bike sat on the tires all winter without a stand, check for flat spots. Roll the bike forward slowly and feel for a thump or vibration. Also look at the sidewalls for dry rot cracks. Tire dry rot means the rubber has hardened and lost its grip. If you see cracking, replace the tire. No exceptions.
Brake Pad Inspection
Look at the brake pads through the caliper window. If you can't see enough pad material, pull the caliper. Pads should have at least 2mm of material. While you are in there, check the rotors for deep scoring or any warping. Spin the wheel and watch the rotor pass through the caliper. Wobble means it is time for new rotors.
Controls and Cables
Sit on the bike and work every control before you start it.
Throttle
Twist the throttle wide open and let go. It should snap back instantly. If it sticks or returns slowly, the throttle cable needs lubrication or replacement. A sticky throttle on a 700-pound Harley is not something you want to discover at highway speed on the Sea to Sky.
Clutch
Pull the clutch lever and check the free play. You should have a small amount of slack at the lever before the cable engages. Too tight means the clutch is always slightly disengaged. Too loose and you won't fully disengage. Adjust and lubricate the cable.
Brake Lever and Pedal
Squeeze the front brake lever. It should feel firm and not pull all the way to the grip. Press the rear brake pedal. Same thing. If either feels spongy you likely have air in the lines or bad brake fluid. Bleed and flush.
Drive System
Chain Drive Bikes
Check chain tension with the bike on a stand. Push up on the bottom run of the chain at the midpoint between the sprockets. Your owner's manual has the spec but 3/4 inch to 1 inch of play is typical. Lubricate the chain with a quality chain lube. Check the sprockets for hooked or worn teeth.
Belt Drive Harleys
Inspect the belt for cracks, fraying or missing teeth. Check belt tension per factory spec. Belts are low maintenance but they do wear. Look at the edges for any signs of the belt tracking off-center.
Primary Chain
On Harleys with a wet primary, check the primary chain adjustment. The primary chain connects the engine to the transmission and needs proper tension. Too loose and it slaps. Too tight and it wears out the compensator and bearings. If you changed the primary fluid already, good. If not, do it now.
Custom Bike Considerations
This is where stock checklists fall short. If you ride a custom build, chopper or older Harley, you have extra items on the list.
Carbureted Bikes
If your Evo engine or older Twin Cam runs a carburetor and it sat with old fuel, you probably need to clean the carb. Drain the float bowls first. If it still won't idle right, pull the carb and clean the jets. Fuel stabilizer helps but it is not a guarantee on carbureted bikes. Varnished jets are the number one reason old Harleys run rough after storage.
Raw Steel and Bare Metal
If your custom has raw steel fenders, a bare metal tank or uncoated parts, check for surface rust. Wipe everything down with a light oil or wax. Chrome polish and protection goes on chrome parts. Raw steel gets a coat of paste wax or oil to keep moisture out.
Custom Paint
If you spent good money on a custom paint job (or we did it for you), wash and wax it before the first ride. Road grit and bugs stick harder to unwaxed paint. A coat of quality wax now protects the finish all season.
Hardtails
No suspension means the frame takes all the stress. Check all welds visually for cracks. Check frame bolts, axle bolts and engine mount bolts for tightness. Vibration and temperature cycles over winter can loosen fasteners.
Aftermarket Electrical
Custom wiring is more vulnerable than factory harnesses. Check every connection. Bullet connectors, Deutsch plugs and spade terminals can all work loose from vibration and temperature changes. Corroded connections cause gremlins that are hard to diagnose. Hit every connector with dielectric grease while you are in there.
Lights and Electrical
Turn the key on and test everything. Headlight high beam and low beam. Tail light. Brake light (front lever and rear pedal should both trigger it). Turn signals. Horn. Kill switch.
Check spark plugs while you are at it. Pull them and look at the color. Light tan or gray is good. Black and sooty means it is running rich. White means lean. Replace plugs that look worn or fouled.
If you have a voltmeter, check the charging system output at idle. You should see 13.5 to 14.5 volts with the engine running. Anything lower and your stator or regulator may need attention.
First Ride Protocol
You did the work. Everything checks out. Now take it easy.
- Keep the first ride to 20 or 30 minutes
- Stay local. Don't head out to the Sea to Sky Highway on ride one
- Ride at an easy pace to let the engine, brakes and tires warm up properly
- Listen for anything unusual: knocks, rattles, squeals or grinding
- When you get back, shut it off and look underneath for fresh leaks
- Check tire pressure again after the ride (warm pressure will be slightly higher, that is normal)
If everything feels right after that first short ride, you are good to go. The Sea to Sky Highway riding season is calling.
When to Bring It to a Shop
Some things are DIY. Some things are not. Bring it to a shop if:
- The bike won't start after a fully charged battery
- The brake lever pulls all the way to the bar
- You hear unusual engine noises (knocking, ticking that was not there before)
- You see active fluid leaks you cannot identify
- Controls are seized or cables are frayed
- The charging system is not putting out enough voltage
- You have a carbureted bike that won't idle right after cleaning the carb