If you own a Yamaha Big Bear 350, you know it’s a powerful and reliable ATV. But like any machine, it can have its quirks.
You might have noticed some issues that slow you down or make your rides less enjoyable. Understanding the most common problems with your Big Bear 350 can save you time, money, and frustration. You’ll discover what to watch out for and how to fix these issues before they become bigger headaches.
Keep reading to make sure your Yamaha stays in top shape and ready for your next adventure.
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Engine Issues
The Yamaha Big Bear 350 is a strong ATV, but engine issues can affect its performance. These problems may cause frustration during rides. Knowing common engine troubles helps with quick fixes and better care.
Starting Problems
Starting issues are common with the Big Bear 350. The engine may fail to turn over or take many tries to start. Causes include a weak battery, dirty spark plugs, or old fuel. Checking these parts often solves the problem fast.
Overheating Concerns
Overheating can damage the engine quickly. The Big Bear 350 might overheat due to clogged radiators or low coolant levels. Riding in hot weather or heavy loads raises engine temperature. Regular coolant checks and cleaning the radiator prevent overheating.
Power Loss Causes
Loss of power makes riding slow and unsafe. Dirty air filters, bad fuel, or worn spark plugs can cause power loss. Engine timing issues also reduce power. Simple maintenance like cleaning filters and using fresh fuel helps keep power strong.
Electrical Troubles
The Yamaha Big Bear 350 is a strong ATV, but it has some electrical troubles. These issues can affect your ride and cause frustration. Understanding these problems helps you fix them fast and keep riding. Electrical problems often start small but can grow if ignored.
Common electrical troubles include battery drain, ignition faults, and lighting malfunctions. Each problem has simple checks and fixes. Knowing what to look for saves time and money. Let’s explore these issues one by one.
Battery Drain Solutions
Battery drain is a frequent problem with the Big Bear 350. A weak or old battery loses charge quickly. Check the battery terminals for corrosion or loose connections. Clean terminals with a brush and tighten connections.
Turn off all electrical parts when not in use. Leaving lights or accessories on drains the battery fast. Use a multimeter to test the battery voltage. Replace the battery if voltage stays low after charging.
Ignition System Faults
Ignition faults cause starting problems. Sometimes, the key switch wears out or gets dirty. Clean the key slot and try a spare key to rule out key issues. Check the ignition coil and spark plug for damage or wear.
Loose or damaged wires in the ignition system can stop the engine from starting. Inspect wiring for breaks or corrosion. Repair or replace faulty parts to restore proper ignition function.
Lighting Malfunctions
Lighting problems reduce visibility and safety. Burnt-out bulbs are a common cause. Check all lights regularly and replace any burnt bulbs. Wiring issues can also cause lights to flicker or fail.
Look for loose connectors or damaged wires in the lighting system. Clean the contacts and secure loose wires. Use a voltage tester to find power supply problems in the lights.
Transmission And Clutch
The transmission and clutch are key parts of the Yamaha Big Bear 350. They control how the bike moves and shifts gears. Problems in these areas can make riding hard and less fun. Understanding common issues helps keep the ATV running smoothly.
Gear Shifting Difficulties
Many riders face trouble shifting gears on the Big Bear 350. The gear lever may feel stiff or stuck. This often happens due to worn shift forks or low transmission oil. Dirt or debris can also block smooth gear changes. Regular checks and cleaning can reduce these problems. Using the right oil grade helps gears move easily.
Clutch Slippage Fixes
Clutch slippage is a frequent issue with the Big Bear 350. It happens when the clutch does not fully engage. The engine revs rise, but the ATV moves slowly. This can be caused by worn clutch plates or weak springs. Adjusting the clutch cable can improve grip. Replacing damaged parts restores proper clutch function. Keep the clutch clean and lubricated for best results.
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Suspension And Handling
The suspension and handling of the Yamaha Big Bear 350 play a key role in its performance. Good suspension keeps the ride smooth and controls the ATV on rough paths. Handling affects how easy it is to steer and maneuver the vehicle. Many riders notice some common problems in these areas. These issues can reduce comfort and safety.
Shock Absorber Wear
The shock absorbers on the Big Bear 350 can wear out over time. This causes a bumpy ride and less control. Worn shocks do not absorb impacts well. You might feel every bump and dip on the trail. This wear often happens after heavy use or rough terrain. Replacing old shocks improves ride quality and handling. Regular checks help catch wear early.
Steering Problems
Steering issues are another common problem. The ATV may feel loose or hard to turn. Loose steering parts can cause unsafe driving. Dirt and rust in the steering system make it stiff. This limits smooth control and makes riding tiring. Tightening and cleaning steering components often fix these problems. Proper maintenance keeps steering reliable and safe.
Brake System Concerns
The Yamaha Big Bear 350 brake system is vital for safe riding. Some riders face issues that affect stopping power and control. These concerns can reduce confidence on rough trails. Knowing common brake problems helps keep the ATV safe. Regular checks and simple fixes can improve brake performance and extend parts life.
Paying attention to brake issues early prevents bigger, costly repairs. Below are common causes of brake fade and tips for replacing brake pads properly.
Brake Fade Causes
Brake fade happens when brakes lose power after heavy use. Riding downhill or stopping often heats the brake parts. Heat makes brake pads less effective. Wet or dirty brakes also reduce grip. Worn brake fluid can boil, causing a soft brake lever feel. Air in the brake lines lowers braking force. Regular brake system checks prevent fade and keep the brakes strong.
Brake Pad Replacement Tips
Replace brake pads before they wear too thin. Thin pads damage brake rotors and reduce safety. Use the right pads for your Big Bear 350 model. Clean the brake caliper and rotor before installing new pads. Avoid touching the pad surface with greasy hands. Test brakes gently after replacement to ensure proper function. Regular pad checks improve brake response and riding safety.
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Fuel System Challenges
The Yamaha Big Bear 350 often faces fuel system challenges. These issues affect the ATV’s performance and reliability. Fuel problems can cause hard starts, stalling, or poor acceleration. Regular care helps keep the fuel system working well. Understanding common problems helps owners fix them faster.
Carburetor Cleaning
The carburetor mixes air and fuel for the engine. Dirt and debris can block the tiny jets inside it. This causes uneven fuel flow and rough engine running. Cleaning the carburetor regularly prevents clogs and improves performance. Use carburetor cleaner spray and compressed air for best results. Take apart the carburetor carefully and clean each part. This keeps the fuel mixture balanced and the engine smooth.
Fuel Line Blockages
Fuel lines carry gasoline from the tank to the engine. Dirt or old fuel can clog these lines. Blockages stop fuel flow, causing the engine to sputter or stop. Check the fuel lines for cracks, kinks, or dirt build-up. Replace damaged lines quickly to avoid leaks. Flushing the lines with fresh fuel can clear minor blockages. Clean fuel lines ensure steady fuel delivery and better engine response.
Maintenance Best Practices
Maintaining your Yamaha Big Bear 350 helps keep it running smoothly. Regular care prevents common problems and extends its life. Simple daily routines make a big difference. Follow these best practices to avoid costly repairs and enjoy safe rides.
Regular Inspection Checklist
Check the oil level before every ride. Look for leaks under the engine. Inspect the air filter for dirt and dust. Tighten all bolts and nuts regularly. Examine tires for wear and proper pressure. Test the brakes to ensure they work well. Look at the battery terminals for corrosion. Check the chain tension and lubrication. Make sure lights and signals are functioning.
Preventive Care Tips
Change the oil every 50 hours or as per the manual. Clean the air filter after riding in dusty areas. Keep the battery charged and clean. Lubricate moving parts like the chain and suspension. Use quality fuel to avoid engine issues. Store the ATV in a dry place to prevent rust. Follow the service schedule recommended by Yamaha. Replace worn parts before they fail. Regular care saves time and money later.
Frequently Asked Questions
What Are The Common Engine Problems In Yamaha Big Bear 350?
The engine may stall, run rough, or have trouble starting due to carburetor or spark plug issues.
Why Does My Yamaha Big Bear 350 Lose Power Suddenly?
Power loss often happens from clogged air filters, fuel problems, or worn spark plugs.
How To Fix Yamaha Big Bear 350 Electrical Issues?
Check battery connections, fuses, and wiring for damage to solve common electrical problems.
What Causes Overheating In Yamaha Big Bear 350?
Overheating is usually caused by low coolant, dirty radiator, or a faulty thermostat.
Why Is My Yamaha Big Bear 350 Leaking Oil?
Oil leaks can come from worn seals, gaskets, or loose drain plugs.
Conclusion
The Yamaha Big Bear 350 has some common issues to watch for. Regular checks help keep it running smooth. Fix small problems early to avoid big repairs. Knowing these issues saves time and money. Your ATV will last longer with good care.
Stay alert and enjoy safe rides every time. Simple maintenance makes a big difference. Keep your Big Bear 350 ready for any adventure.