Yamaha YZ85M YZ85 2021 Owner's Manual

Yamaha YZ85M YZ85 2021 manual cover
Pages 84
Year 2021
Language(s)
English en

Yamaha YZ85M YZ85 2021 Specification

The Yamaha YZ85M YZ85 2021 is engineered to deliver a competitive edge in the youth motocross segment. This high-performance machine is powered by a 85cc liquid-cooled, two-stroke engine with Yamaha Power Valve System (YPVS) that provides a broad spread of power throughout the rev range. The Keihin PWK28 carburetor, paired with reed-valve induction, ensures crisp throttle response and optimal fuel delivery.

The YZ85M features a six-speed transmission, allowing riders to fully exploit the engine's power band across varied track conditions. A lightweight, high-tensile steel frame offers excellent rigidity and durability, contributing to the bike's agile handling characteristics. The subframe is removable, which facilitates easier maintenance and customization.

Front suspension duties are handled by fully adjustable 36mm KYB inverted forks, offering 275mm of travel. The rear suspension features a fully adjustable KYB single shock with 282mm of travel, utilizing a rising-rate linkage for improved traction and stability. Both suspension systems allow for fine-tuning to match rider preferences and track conditions.

Braking performance is assured by a 220mm front disc brake and a 190mm rear disc brake, providing reliable stopping power and enhanced control. The bike rolls on 17-inch front and 14-inch rear wheels, equipped with Dunlop MX3S tires that offer excellent grip and handling on various terrains.

Ergonomically, the YZ85M is designed to accommodate younger riders with a seat height of 33.1 inches and adjustable handlebar mounts. The slim bodywork and flat seat design allow for greater rider movement and control. With a wet weight of approximately 73 kg (161 lbs), the Yamaha YZ85M YZ85 2021 strikes a balance between performance and manageability, making it an ideal choice for aspiring motocross racers.

Yamaha YZ85M YZ85 2021 F.A.Q.

How do I properly break in my new Yamaha YZ85M YZ85 2021 engine?

To break in the engine, start by letting it warm up for a few minutes. Ride gently for the first 30 minutes, avoiding high RPMs. Gradually increase the load and RPMs over the next 5 hours of operation while varying the speed. Regularly check fluid levels and inspect the bike for any signs of leaks or loose components.

What is the recommended maintenance schedule for the Yamaha YZ85M YZ85 2021?

It is recommended to follow the maintenance schedule outlined in the owner's manual, which includes checking and replacing the engine oil every 6-10 hours of riding, cleaning or replacing the air filter frequently, checking tire pressure before every ride, and inspecting the chain for tension and lubrication regularly.

How can I troubleshoot starting issues with my Yamaha YZ85M YZ85 2021?

If the bike won't start, check the fuel supply to ensure the tank is not empty. Inspect the spark plug for fouling or damage, and replace if necessary. Verify that the air filter is clean and not clogged. Lastly, check the battery connections and charge if needed.

What type of oil should I use in my Yamaha YZ85M YZ85 2021?

Use a high-quality, 2-stroke motorcycle oil that meets or exceeds the specifications outlined in the owner's manual. Yamaha recommends using Yamalube 2R or an equivalent oil.

How do I adjust the suspension on my Yamaha YZ85M YZ85 2021 for optimal performance?

To adjust the suspension, start by setting the sag according to the rider's weight. Then, adjust the compression and rebound damping settings on the forks and shock to suit the terrain and riding style. Refer to the owner's manual for detailed guidance on making these adjustments.

What should I do if my Yamaha YZ85M YZ85 2021 overheats?

If the bike overheats, stop riding immediately to prevent engine damage. Check the coolant level and top up if necessary. Inspect the radiator for obstructions and clean any debris. Also, ensure that the radiator cap is functioning properly and that the cooling fan operates as intended.

How can I improve the performance of my Yamaha YZ85M YZ85 2021?

Improving performance can be achieved by upgrading the exhaust system, fine-tuning the carburetor for optimal fuel-air mixture, and installing a high-performance air filter. Additionally, regular maintenance and ensuring proper tire pressure can enhance overall performance.

What are the common wear items I should regularly inspect on my Yamaha YZ85M YZ85 2021?

Common wear items include the chain and sprockets, brake pads, tires, and clutch components. Regularly inspect these parts for wear and replace them as necessary to ensure optimal performance and safety.

How do I clean and maintain the air filter on my Yamaha YZ85M YZ85 2021?

Remove the air filter and wash it with a mild detergent and water. Allow it to dry completely, then apply air filter oil evenly over the surface. Reinstall the filter, ensuring a proper seal to prevent dirt from entering the engine. Clean the air filter after every ride in dusty conditions.

What should I do if I experience poor throttle response on my Yamaha YZ85M YZ85 2021?

Poor throttle response may be due to a clogged carburetor or worn spark plug. Clean the carburetor thoroughly and replace or clean the spark plug. Check the throttle cable for proper tension and smooth operation. Adjust the carburetor settings if necessary for optimal performance.