Yamaha YZ125H2 2017 Owner's Manual

Yamaha YZ125H2 2017 manual cover
Pages 236
Year 2017
Language(s)
English en

Yamaha YZ125H2 2017 Specification

The Yamaha YZ125H2 2017 is a high-performance motocross bike designed for competitive racing and demanding off-road conditions. This model is powered by a 124cc, liquid-cooled, two-stroke engine that features Yamaha's proprietary YPVS (Yamaha Power Valve System) for enhanced power delivery across the RPM range. The engine is paired with a six-speed, close-ratio transmission that provides smooth and precise gear shifts, facilitating optimal performance on varied terrain.

The chassis of the YZ125H2 is constructed from lightweight aluminum, contributing to the bike's excellent handling and agility. The front suspension consists of a fully adjustable KYB Speed-Sensitive System fork, offering 11.8 inches of travel for superior shock absorption and stability. The rear suspension features a fully adjustable KYB shock with 12.4 inches of travel, ensuring consistent performance over rough surfaces.

The braking system is equipped with a 270mm front disc and a 245mm rear disc, both providing exceptional stopping power and control. The bike's ergonomics are designed for rider comfort and maneuverability, featuring a flat seat, narrow fuel tank, and optimized handlebar positioning. The YZ125H2 also boasts lightweight Excel rims, wrapped in high-traction tires to maximize grip and control.

Additional features include a large-capacity radiator with a ten-row core for efficient cooling, a reed valve induction system for improved throttle response, and a compact exhaust system designed to enhance power output while reducing overall weight. The Yamaha YZ125H2 2017 stands out with its striking graphics and durable bodywork, making it a top choice for serious motocross enthusiasts seeking a blend of performance, reliability, and cutting-edge technology.

Yamaha YZ125H2 2017 F.A.Q.

How do I properly break in the engine of my Yamaha YZ125H2 2017?

To properly break in the engine, start by running the engine at varying speeds for the first 30 minutes, avoiding full throttle. After the initial 30 minutes, ride for an additional hour at moderate speeds, gradually increasing throttle application. It's crucial to change the transmission oil after the break-in period to remove any metal particles.

What is the recommended maintenance schedule for the Yamaha YZ125H2 2017?

The recommended maintenance schedule includes checking and cleaning the air filter every ride, changing transmission oil every 10 hours of riding, inspecting the spark plug every 6 hours, and lubricating the chain every ride. Regularly inspect and tighten bolts, nuts, and spokes as part of routine maintenance.

How can I adjust the carburetor on my YZ125H2 for better performance?

To adjust the carburetor, first locate the air screw and the idle screw. Adjust the air screw by turning it 1-2 turns out from fully seated, then adjust the idle screw to achieve a steady idle. Fine-tune the air screw by turning it in or out to find the smoothest idle. Test under load and readjust as necessary.

What is the correct way to clean the air filter on a Yamaha YZ125H2?

To clean the air filter, remove it from the air box and wash it in warm, soapy water. Rinse thoroughly and let it dry completely. Once dry, apply air filter oil evenly and squeeze out any excess. Reinstall the filter ensuring it's properly seated to avoid dirt ingress.

How do I troubleshoot starting issues with my YZ125H2?

If the bike is difficult to start, check the spark plug for fouling and clean or replace it if necessary. Ensure there is sufficient fuel and that the fuel is not stale. Inspect the carburetor for blockages and clean it if necessary. Verify that the choke is functioning correctly.

What tire pressure is recommended for optimal performance on the YZ125H2?

The recommended tire pressure for the Yamaha YZ125H2 is typically around 12-15 psi for the front tire and 12-15 psi for the rear tire. Adjust the pressure based on the type of terrain and rider preference, ensuring not to go below 11 psi to avoid pinch flats.

How can I maintain the suspension system of my YZ125H2?

Regularly inspect the suspension for leaks or damage. Clean the fork tubes after each ride to prevent dirt from entering the seals. Check and adjust the sag as needed, and consider having the forks and shock serviced by a professional every 40 hours of riding.

What type of oil should I use for the transmission in my YZ125H2?

For the Yamaha YZ125H2, use a high-quality, motorcycle-specific 2-stroke transmission oil with a viscosity of 10W-40 or 10W-30. Ensure the oil meets or exceeds JASO MA or API SG specifications for optimal performance and protection.

How do I adjust the chain tension on the Yamaha YZ125H2?

To adjust the chain tension, place the bike on a stand and locate the chain adjusters on the swingarm. Loosen the axle nut, then turn the adjuster bolts evenly on both sides to achieve 30-40mm of slack at the midpoint of the chain. Tighten the axle nut securely once adjusted.

What should I do if my YZ125H2 is overheating?

If the bike is overheating, check the coolant level and top it off if necessary. Ensure the radiator is free from obstructions and dirt. Examine the radiator cap for proper sealing and check the water pump for functionality. Avoid prolonged idling and ensure the fuel mixture is not too lean.