Key Features

• Brand New High Quality GY6 50cc Engine, Short Case Motor, Use 669 Belt, Air cooled, CVT 4 Stroke, Auto Clutch, Electric Start, Long Transmission Shaft.
• It also fits for most China made 50cc Dual Rear Shock Scooters.
• Fit Boom Vehicles:
  Boom BD50QT-9A
  
• Compatible Vehicles:
  50cc GY6 Dual Rear Shock Scooters
  50cc China made Dual Rear Shock Scooters
• CVT: CVT consist mainly of 2 transmission pulleys and 2 transmission belts. It’s compact, simple design offers seamless shifting between an unlimited amount of varying gear ratios, allowing a smooth rate of acceleration.
• Crank Shaft: The engine is low speed with high torque and has large diameter bearings for crankshaft connecting rod, increasing the reliability of the bearings.
• Forced Air-cooled Engine: There are metal fins covering the outside of the cylinders and the heat generated by the engine is released directly into the air when the cooling fan blows air over fins. It has the advantages of simple structure, light weight, wide adaptability to climate change, rapid start up and no need of radiator.
• High-flow Oil Pump: Reduces the wear of friction pairs and prolongs the engine service life.
• Lubricating Oil Strainer: Helps removing solid contamination from lubricating oil, largely reducing the wear of friction pairs and prolonging the engine service life.
• Aluminum Cylinder Head & Body: Improves the heat dissipation capability, cuts the weight and increases the torque of the engine.
• PLEASE NOTE: Please measure the physical size to be sure you get the correct one.

Specifications

Engine Model	308-999041	Ignition Method	CDI
Engine Type	Single Cylinder, 4-Stroke, 2-Valve	Lubrication	Pressure/splash
Cooling System	Air Cooled	Fuel Supply	Carburetor Atomization
Horsepower	2.82HP/6500Rpm (2.1KW/6500Rpm)	Starter	Electric/Kick starter
Max. Torque	3.1N.m/5500rpm	Transmission	CVT
Min. Stable Idle Speed	1600±150r/min	Clutch	Shoe-type Automatic Centrifugal Dry Clutch
Min. Fuel Consumption	9.65oz/HP.h (367g/Kw.h)	Cylinder Diameter	1.54" (39mm)
Carburetor Model	PD18J	Piston Stroke	1.63" (41.5mm)
Carburetor Type	Horizontal Vacuum Carburetor	Bore & Stroke	1.54" x 1.63 " (39mm x 41.5mm)
Spark Plug Model	A7TC	Cylinder Working Volume	0.01 Gallon (49.5ml)
Fuel No.	>=87#	Compression Ratio	10.5:1
Lubrication Model	SF15W/40-SE	Ignition Type	CFW
Lubrication Capacity	0.20 Gallon (900ml)

Description

The quality engine system production complies with the requirements of ISO9001:2000. All the engines have passed the 200-hour enhanced durability bench test and the 20000 km road test. The engine has the similar performance, facility and reliability as many brand engines, such as Honda, Yamaha, Kawasaki and so on. It also obtained the DOC authorization. Please do not compare our engines to other low quality engines, we only sell high quality engines.

All engines have the identification, gears and oil labels. You can purchase with confidence.

This engine assembly comes with INTAKE PIPE and SPARK PLUG, but doesn't come with Carburetor, Battery, CDI, Voltage Regulator, Ignition Coil etc.

Material: High quality aluminum cylinder head and iron cylinder body

Transportation: The oil in the engine will be drained out and the engine will be repackaged to avoid leaking before shipping. We package the engines with five-layer anti-earthquake carton boxes to ensure the items arrive in perfect condition.


Usage Tips

• Do start the engine in an open place to let the exhaust gas gets full emission.
• For Automatic Transmission Engines, please don't start is at reverse. For Semi-auto and Manual Transmission Engines, please do start at Neutral.
• Check lubricating oil level and fuel level regularly. Make sure they are sufficient and not leaked.
• Please do not accelerate until it has warmed up for 1-3 minutes if cooler start engine.
• All new engines need a initial run-in time. Because the surface of the parts is not that smooth, they need a time to run-in to have the parts get smooth and work together better. The initial run-in should be at least 500KM. During the initial run-in, please avoid full-open throttle and don't start it over 80 percent of the top speed. Make sure to clear all fuel and change new when initial run-in over. Be strictly obey this will prolong the engine service life and has it working in good condition.

Parts Warehouse, Fast Delivery, Lowest Price

	We have the largest selections for parts and carry more parts than any competitors. Check our parts section and our competitor's , if they ever have one, you will know the difference immediately.
	We update our site everyday, if you see it then we have it available. Most orders shipped within 1 business days!
	Lowest Price Guarantee! We have the best prices, Period.

Assembly

Some assembly required.

Shipping

Normally it will take up to 3 business days to process your order. Most orders will be shipped from our warehouses in Los Angeles. After our shipping company picks up your order from our warehouses, the estimated delivery time will be 3-10 business days depends on your location.

Shipping charge for one single unit of 308-999041 is Free , and you will get discounted shipping price if you order multiple item.

All ATVs, Go Karts, Mopeds, Dirt Bikes and UTVs will be put in a steel crate and shipped by a reputable trucking company to door directly. Electric scooters, pocket bikes, parts and accessories will be shipped by FedEx or USPS. We will email you a tracking number after your order is shipped. Our trucking company will always call you before the delivery and let you check the condition of your items when they arrive, so do not worry about that you could miss the delivery.

Don't be fooled by some companies "Free Shipping" offers. They just add shipping charge in their product prices and their prices are usually $150-$500 more than our prices. In addition, some competitors only ship your bike to the nearest trucking company terminals, those terminals are not readily available in a lot areas, that means you may have to spend your own time, your own gas and get a truck and trailer to drive long way ( in some cases, it could be more than 150 miles) to get it. Also, some competitors will ask you to pay additional $30-50 for residential address delivery and $50-$75 for liftgate service. Those motorcycles are very heavy and in most cases, you do need those services and end up paying a lot more for shipping.

No any hidden charges or tricks here, we only offer you fast, reliable and honest services. Our shipping charge already includes liftgate service and residential address delivery and we will deliver your bike right to your door.

Note: For oversized bikes, there might be a chance that our trucking company driver cannot unload this bike with liftgate on his own. The reason is that there is no lift gate big enough to unload this bike and this bike is too heavy for one person to unload. If our trucking company informs us so, you are expected to have several friends to help our truck driver to unload the bike when it arrives at your door. You can also provide a business address with a forklift to us for delivery or you can go to trucking company local terminal to pick up your bike.

Want a Rush Processing?

Normally orders are processed and shipped out of our warehouses within 3 business days. If you pay for the RUSH option, we will ship out your order within one business day. If you have a birthday or need this order rushed to you, simply select the Rush Option when placing your order and we GUARANTEE to ship out within one business day. If for any reason we cannot get your order shipped out within one business day, we will refund your rush charge and still rush your order.

No Sales Tax

We do not charge sales tax except in California. That's extra savings for our customers comparing to buying bikes from local vendors on top of our already lower sale prices.

Why Buy From Us?

We are a reliable and specialized company for selling powersports products:
We are dedicated to powersports products with knowledgeable service staff to answer your questions and provide service and technical support before and after sales. We are a bonded and licensed motorcycle dealer and have a large store front open to public in California. We have been in this business for eleven years.

We offer great prices:
Our prices are the best in this industry, we welcome our customers to look around and compare our prices with local dealers and other online vendors. Shopping with us can save you a lot of money, and we offer great discounts on multiple item purchase and parts, you will save even more, when purchasing multiple items. You don't need to pay tax on your purchase if you are not in California.

We carry quality products:
With extremely competitive prices, we sell only quality products. We carefully select what products to carry from over 300 different manufacturers. Many products we sell are manufactured by true OEM factories for Honda, Yamaha, Bombardier and other famous name brands to bring you the best quality products in the market today.

Parts of bikes we carry are readily available:
We have a dedicated parts department and a parts warehouse to stock parts for products we sell. Whenever you need parts, simply email us, we will send replacement parts to you. You can get parts from us directly at extremely low prices even if your warranty has expired!!

We provide great technical support:
We do know our products and our technicians have worked with powersports products for years. If you have any problem with assembling, riding and maintaining our bikes, just email us and our friendly technical staff will walk you through any problem you have step by step until you problem is fixed!

We have the best shipping:
We always ship bikes directly to your door and we do not charge additional for residential delivery and lift gate service (Free lift-gate service except for bikes and samll ATVs). All our bikes are put in a crate and well protected by a steel frame and foams. We only ship our bikes by a reputable trucking company to ensure lowest shipping damage rate and great service!

Ride Safe and Have Fun!

Off-road riding is great fun! When you take proper safety precautions, injury is less likely to occur. As a responsible rider, you must outfit yourself in appropriate safety gear every time you hit the trails. Doing so keeps injuries and equipment damage to a minimum.

Buy a helmet safety approved by the Department of Transportation. It will have "D.O.T." stamped on the back, near the base. It should fit snugly, allowing very little head movement within the helmet.

Purchase a quality set of goggles. Trail debris can hit a rider in the face, and sunglasses do not offer enough eye protection. Purchase special safety goggles that easily fit over prescription eyeglasses if necessary.

Obtain a high-quality pair of off-road riding boots. Tennis shoes and hiking boots are not safe enough for off-road trail riding. A single rock can break an ankle on an ORV trail. Stout riding boots with heavy-duty casings are essential trail safety gear.

Buy a comfortable pair of riding gloves. Vibration from the handlebars can cause sore hands and wrists. A good pair of riding gloves will absorb some of the impact and make your ride more enjoyable.

Purchase the appropriate clothing. Regardless of outside temperature, wear a lightweight, long sleeved shirt and thick, full-length pants to protect the skin. Breathable material is necessary, as are bright colors easily visible to oncoming riders. Riding pants and jerseys offer the rider much needed protection from overhanging limbs, branches, and flying debris.

Acquire a chest protector. Stones thrown by other ATVs and unexpected branches in the trail can hit a person squarely in the chest while trail riding. It is extremely dangerous to have the wind knocked out of you at 50 mph. A chest protector is mandatory safety gear for ORV trail riding.

Purchase a good neck brace. It provide strong support and good protection to your neck and it is mandatory to wear for dirt riding in some states.

We carry all types of high quality name brand riding and protective gear. Click Riding Gear to see our full selection.