This is hundreds of pages of service and repair manuals for GY6 50cc and 150cc Scooter engines. Includes 4 (four) Seperate Service manuals and a Troubleshooting Chart. Best pages in this manual are the timing marks when installing piston kits, rings, etc. • THE SCOOTDAWG COMPLETE OWNER S MANUAL FOR GY6 SCOOTERS This is the manual that should have come with your scooter! For Engines 139QMB and157QMJ www.ScootDawg.com ©2005 ScootDawg.com. • Introduction This manual is intended as a real world manual for all GY6 scooters. This is only a supplement to the manual provided by your dealer or manufacturer. Most of the manuals provided with Chinese scooters are very difficult to understand and most do not have the information you need to properly care for your scooter. • Some owners of less expensive Chinese scooters have reported improperly bled brake lines out of the factory. The easiest and most effective way to do this is to purchase an inexpensive brake bleeding kit at an auto parts store. Follow the instructions with the kit. • Gauges and Controls With so many body styles available, the location of your controls may differ and you may have some not included here but this will give a good generic indication of the gauges and controls found on a scooter. Your controls function as illustrated. 150cc Gy6 Manual Free Download• To accelerate, twist the throttle in a counterclockwise motion. When braking, both brake levers should be depressed with even pressure. • You can read about the hard break-in method and make your own decision. The main rule you need to follow is to NOT maintain a constant engine speed for extended periods of time. • Changing the Oil The oil should at a minimum be changed after the first 300km (180 miles) and every 1000km (600 miles) after that. It doesn t hurt to change it after the first 50 miles. New engines can produce small shavings in the first few miles that can be abrasive to the internal parts. • Capacity is approximately 0.9 liter. Check the level using the dipstick. Do not screw the dipstick in while checking the level. Do not overfill. Replace filler cap. Check for leaks. Take a short ride and check the level and for leaks again. • How to Change Gear Oil Tools you will need 1. 10 mm wrench 2. Pistol grip oil can 3. 75w90 gear oil 110cc (3.7 oz.) 4. Gy6 Scooter Motor Repair ManualMeasuring cup. Do the following while the scooter is warmed (not hot). Measure 110cc (3.7 oz) of gear oil into a measuring cup. • Air Filter The air filter on the GY6 scooters is usually found in one of two places. One is on the side next to the kick start. Some models have it located under the seat. Alabama financial support worker 50247 exam guide. Some of the newer models may have it located somewhere else but it should be easy to find. • Spark Plug NGK C7HSA or NGK CR7HSA The CR7HSA has a resistor to keep radios from buzzing due to the magneto/coil's electrical interference. The spark plug can be found behind this hatch. The spark plug should be cleaned every time it is inspected with a small wire brush. • Idle Speed Adjustment 150cc=1400rpm +/- 50cc=1900rpm +/- Engine idle speed should be adjusted to 1400 rpm for the 150cc and 1900 rpm for the 50cc. However, when the scooter is new, it may need to be adjusted a little higher until the engine breaks in to prevent dying at stop lights, etc. If you don t have a tachometer you can adjust by ear. • CARBURETOR TUNING It is rare that this procedure is needed, usually after major modifications to the engine or if you live in a very high altitude location. This procedure should be performed with the engine warmed. Adjust idle to 1400 rpm for 150cc or 1800 rpm for the 50cc with idle screw. To the instructions in the owner's maneaJ, Sears wiii repair or repiace,:freeof charge, any [saris. ENGINE =_£ODEL NU_BEiB 289707_ TYPE NU;_;IBER 0! Craftsman 289707 owners manual. Gy6 Engine Manual• Brakes Rear Drum Brakes If you have more than ¾ free play or feel the handle bottom out, you need to adjust your brake. Turn the adjusting nut clockwise for a tighter adjustment. Make sure that the concave side of the adjusting nut is seated securely on the pin. Adjust inward until free play is 3/8 to ½. • Front (and Rear) Disc Brakes Locate the window to observe brake fluid level. Make sure master cylinder is level by placing the scooter on the center stand and centering the handlebars. If the fluid level is low, inspect the brake pads for excessive wear. If the pads are ok, you are probably leaking fluid. • Caring for and Storing Your Scooter If you are going to store your scooter for extended periods, such as over winter months, it is important that you do a little preparation. Add a fuel stabilizer to your fuel such as Stabil. This will prevent your fuel from becoming unstable and causing damage to the internal parts of your fuel system. • Maintenance Schedule This schedule may not match that which came with your scooter.
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