Motorcycle repair guides

27 step-by-step guides with the tools, safety warnings, torque figures and what a shop would charge for the same job.

• Battery Replacement — Beginner, 20-30 min. Save $90-120 vs a shop. How to replace a motorcycle battery yourself in under 30 minutes. Covers finding the battery under the seat or side panel, disconnecting the terminals in the safe order, choosing between AGM and lithium, and getting the new battery seated without shorting a wrench across the posts.
• Battery Maintenance & Testing — Beginner, 15-20 min. Save $40-65 vs a shop. How to test a motorcycle battery with a multimeter and keep it alive through winter storage. Covers resting voltage versus charging voltage, reading cranking voltage under load, cleaning terminals, and using a battery tender without cooking the cells.
• Chain Adjustment & Maintenance — Beginner, 20-30 min. Save $45-80 vs a shop. How to adjust motorcycle chain tension and lube the chain properly. Covers measuring free play at the right point in the chain's rotation, keeping the rear wheel aligned, re-torquing the axle, and why chain slack must be judged with the suspension loaded rather than on a paddock stand.
• Brake Pad Replacement — Intermediate, 45-60 min per caliper. Save $90-160 vs a shop. How to replace motorcycle brake pads without damaging the rotor or contaminating the friction material. Covers pushing the pistons back safely, choosing sintered versus organic pads, caliper bolt torque, and bedding new pads in so the lever feels right from the first ride.
• Brake Fluid Flush — Intermediate, 30-45 min per circuit. Save $60-115 vs a shop. How to flush and bleed motorcycle brake fluid to cure a spongy lever. Covers why DOT 4 absorbs moisture and loses boiling point, the right bleed order, keeping air out of the master cylinder, and how to get a firm lever back without a vacuum tool or a helper.
• Spark Plug Replacement — Beginner, 30-60 min (varies by bike). Save $75-150 vs a shop. How to change motorcycle spark plugs without cross-threading an aluminium head. Covers reading the colour of the old plug, checking the gap, torquing correctly, and when iridium plugs are actually worth the extra money on a bike where access means pulling the tank.
• Oil & Filter Change — Beginner, 30-45 min. Save $75-130 vs a shop. How to change motorcycle oil and the filter yourself. Covers picking a JASO MA2 oil that will not make a wet clutch slip, why the crush washer is single use, correct drain plug torque into an aluminium sump, and reading the level properly so you do not overfill.
• Air Filter Replacement — Beginner, 15-30 min. Save $60-120 vs a shop. How to replace a motorcycle air filter, and why a clogged one costs you power and fuel economy. Covers getting into the airbox, paper versus oiled cotton elements, and the over-oiling mistake that fouls intake sensors and throws fault codes.
• Tire Replacement Guide — Advanced, 1-2 hours per tire. Save $100-180 vs a shop. How motorcycle tire replacement works, from breaking the bead to balancing the wheel. Covers reading the DOT date code, rotation direction, correct bead-seating pressure, axle torque on refitting, and an honest look at when to hand the job to a shop.
• Coolant Flush & Replacement — Intermediate, 45-60 min. Save $85-145 vs a shop. How to flush motorcycle coolant and refill it without leaving an air lock behind. Covers why aluminium engines need silicate-free coolant, mixing with distilled water, burping the system properly, and the radiator cap check most riders skip.
• Valve Clearance Check & Adjustment — Advanced, 2-4 hours to check; a full day if shims are needed. Save $210-740 vs a shop. How to check and adjust motorcycle valve clearances. Covers why the engine has to be stone cold, finding TDC on the compression stroke, the slight-drag feel of the right feeler blade, and the difference between a screw-and-locknut head you can adjust in place and a shim-under-bucket head that means pulling the cams and ordering parts.
• Fork Oil Change — Advanced, 3-4 hours for both legs. Save $120-260 vs a shop. How to change motorcycle fork oil and set the level correctly. Covers supporting the bike safely with the front wheel off the ground, cracking the fork caps loose before the legs come out, bleeding the damper, and the part most people get wrong: fork oil level is an air gap measured from the top of the tube with the spring out and the fork fully compressed, not a volume you pour in.
• Wheel Bearing Replacement — Advanced, 2-3 hours per wheel. Save $95-210 vs a shop. How to diagnose and replace motorcycle wheel bearings. Covers the lift-and-rock test that tells you a bearing is finished, why bearings and seals are always replaced as a complete set, driving the old ones out square without scoring the hub, and the one mistake that destroys a fresh set immediately: fitting the second bearing without the centre spacer in place.
• Chain & Sprocket Kit Replacement — Intermediate, 2-3 hours. Save $160-350 vs a shop. How to replace a motorcycle chain and sprocket kit as a set. Covers reading hooked, shark-fin teeth and the half-tooth pull test that says the chain is finished, counting teeth and what changing gearing actually does, why a clip masterlink does not belong on a powerful bike, and setting slack and swingarm alignment before you re-torque the axle.
• Clutch Cable Adjustment & Replacement — Beginner, 10-15 min to adjust; 45-90 min to replace a cable. Save $60-115 vs a shop. How to set motorcycle clutch cable free play, and how to replace a cable that has started to fray. Covers why too much free play drags and too little burns the friction plates, adjusting at the lever barrel before the engine-end adjuster, and routing a new cable so it does not bind at full lock.
• Headlight Bulb Replacement — Beginner, 15-45 min depending on fairing access. Save $48-80 vs a shop. How to replace a motorcycle headlight bulb without killing the new one in a week. Covers why you never touch halogen glass with bare fingers, identifying H4 versus H7 and the other common bases, the honest trade-offs of an LED conversion in a reflector housing, and checking the beam aim afterwards so you are not blinding oncoming traffic.
• Fuel Filter Replacement — Intermediate, 20-30 min for an inline filter; 1.5-3 hours for an in-tank pump module. Save $75-230 vs a shop. How to replace a motorcycle fuel filter safely. Covers the fire precautions that come before any tool comes out, depressurising a fuel-injected system by pulling the pump fuse and letting the engine stall, the difference between a ten-minute inline filter and an in-tank pump module, the flow direction arrow, and priming to check for leaks before the engine ever starts.
• Winter Storage & Recommissioning — Beginner, 2-3 hours to lay up; 1 hour to recommission. Save $90-170 vs a shop. How to put a motorcycle away for winter so it starts in spring, and how to bring it back properly. Covers fuel stabiliser and a full tank against condensation, a smart battery maintainer instead of an old trickle charger, keeping weight off the tyres, changing the oil before storage rather than after, a breathable cover, blocking the exhaust against rodents without forgetting you did it, and the recommissioning checklist for the first ride.
• Brake Bleeding — Intermediate, 45-90 min for one circuit; allow 2 hours for both ends. Save $62-125 vs a shop. How to bleed motorcycle brakes and get a firm lever back. Covers reading the DOT spec moulded into the reservoir cap and why DOT 5 must never touch a glycol system, bleeding the caliper furthest from the master cylinder first, keeping the reservoir topped so you never draw air back in, and what a lever that is still spongy after a full bleed is actually telling you.
• Throttle Body / Carb Synchronisation — Advanced, 1.5-3 hours including access and a test ride. Save $75-130 vs a shop. How to synchronise motorcycle throttle bodies or carburettors so a lumpy idle and a snatchy first inch of throttle go away. Covers hooking vacuum gauges or a manometer to the inlet ports, getting the engine to full operating temperature before you touch anything, adjusting every cylinder to the non-adjustable reference cylinder, and why a sync will never fix a fault that is really a valve clearance or an air leak.
• Steering Head Bearing Check & Adjust — Advanced, 30-45 min to check and adjust; 3-5 hours to replace. Save $140-340 vs a shop. How to check motorcycle steering head bearings for the classic notch at dead ahead, and how to set the preload without making things worse. Covers lifting the front wheel clear, telling head bearing play apart from fork bushing and wheel bearing play, why an over-tightened head is every bit as dangerous as a loose one, and the seat-then-back-off procedure that stops a fresh set going slack in a fortnight.
• Coolant Hose Replacement — Intermediate, 1.5-3 hours plus cool-down and a re-check ride. Save $115-280 vs a shop. How to replace a leaking or perished motorcycle coolant hose without cooking the engine afterwards. Covers pressure-testing the cold system instead of guessing where the leak is, fitting new clamps rather than reusing tired ones, routing hoses clear of the exhaust, burping the air out until the fan cycles, and why the radiator cap never comes off a hot engine.
• Fuse & Relay Diagnosis — Beginner, 20-60 min for a simple blown fuse; longer if you are tracing a short. Save $62-140 vs a shop. How to find a blown motorcycle fuse and test a relay without guessing. Covers reading the fuse box legend, checking a fuse properly instead of squinting at it, swapping an identical relay to see if the fault follows it, and why a fuse that blows again the moment you fit it is a short circuit that must never be answered with a bigger fuse.
• Tyre Pressure & Wear Inspection — Beginner, 10-15 min. Save $18-35 vs a shop. How to check motorcycle tyre pressure and read what the wear is telling you. Covers checking cold and why a hot reading tricks you into under-inflating, using the placard figure rather than the maximum moulded into the sidewall, finding the wear indicators, the squared-off profile that motorway miles produce, and reading the DOT date code because rubber ages out long before the tread runs out.
• Intake Boot & Vacuum Leak Inspection — Intermediate, 45-90 min to inspect and test; 2-4 hours if a boot needs replacing and the bike re-syncing. Save $110-300 vs a shop. How to find a motorcycle vacuum leak when the idle hunts, hangs high or the bike pops on the overrun. Covers flexing the rubber intake boots between the throttle bodies or carbs and the head to open up cracks that hide underneath, checking clamps, vacuum caps and hoses, the carb-cleaner or propane enrichment test and exactly how to do it without setting the bike alight, replacing a boot, and why the throttle bodies need re-syncing afterwards.
• Reading Fuel-Injection Fault Codes — Beginner, 15-45 min to read and record codes; circuit checks take longer. Save $80-120 vs a shop. How to read the fault codes a fuel-injected motorcycle has already stored before you spend money on sensors. Covers the manufacturer-specific ways bikes show codes on the dash, what a diagnostic port and scanner can and cannot do, writing codes down before clearing anything, and why a code names a circuit rather than a failed part — so connectors, grounds and wiring get checked first.
• Exhaust Header Gasket Replacement — Intermediate, 1.5-3 hours plus an overnight soak and a later re-check. Save $105-320 vs a shop. How to replace a leaking motorcycle exhaust header gasket without snapping a stud in the head. Covers telling a header leak apart from a valve tick, why the job only starts on a stone-cold engine, soaking the studs and nuts in penetrating oil overnight, fitting a new crush gasket every single time the header comes off, bringing the flange nuts up evenly in stages, and re-checking after a few heat cycles.