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JET SILVER 49CC DESIGN ADVANTAGES :
- IMPROVED INTERIOR AND EXTERIOR PACKAGING
These new bicycle engine kit packages come with greatly improved packaging to stand up to shipping damage.
- SLANT 49CC ENGINE
These engines require less head space for mounting in your bicycle and has more torque and power compared to regular 49cc engines. These engines come with an extended clutch arm requiring less effort when using the clutch lever.
- UPGRADED CHROME SPROCKET DESIGN
Using the chrome curved sprocket from our Limited Edition Kits.
- HIGH QUALITY FUEL LINE
Improved fuel line quality is included with these kits that don't get hard over time.
- REDESIGNED PUSH CLUTCH LEVER
Allows for easier engine clutching.
- IMPROVED GAS TANK FASTENERS AND MOUNTS
Strong gas tank clamps are included to allow a secure gas tank mount to the bicycle frame.
- NEW DESIGN IDLER PULLEY WITH ROLLER BEARINGS
Stronger and more durable idler wheels, and a quieter and more fluid roller system.
- THE LATEST HUSH MUFFLER DESIGN
The hemispherical (half-circle) endcap and larger exhaust pipe diameter make for a smoother-running, more powerful engine.
- CLUTCH REMOVAL TOOL AND MUFFLER SUPPORT
The clutch removal tool is included with this package and will definitely come in handy for maintenance down the road. The muffler support design has been improved.

This complete bicycle engine kit package comes with every thing that you'll need to convert any regular 26" single speed or multi speed mountain bike into a motorized bike. You'll still be able to pedal the bike and ride like normal or start the engine by releasing the clutch lever. There's no rope pulling needed. You can stop or start the engine as you ride. Twist grip hand throttle controls speeds from 25 to 32/kmph depending on the gear ratio. This installation kit comes with a 44 tooth 9 hole chrome racing sprocket with easy to install 9 bolt universal mounting hardware that clamps over the rear wheel hub and spokes. This creates a totally independent drive sprocket and chain that does not interfere with your current drive chain or peddling.

With the built in clutch you maintain full function of the original bike. Pedal, shift, and ride your bike like normal. The engine kit only adds about 19lbs to your bike. When you want to engage the engine simply release the clutch hand lever and the engine springs to life. To power off, simply press the included kill switch.

What do I need to put my motorized bike together?
1. Requires basic mechanics and simple tools
2. It takes about a few hours to install while using easy to follow detailed instructions (included). Additional instructions are available only upon a customer's request.

What type of bicycles with these engines fit on?
The engine requires a clearance of at least 15 inches in height on the seat tube (the part of the frame under the seat) and 14-15 inches in length on the down tube (the diagonal part of the frame), and it is approximately 5 inches wide.
Here is a picture reflecting the bicycle frame requirements : CLICK HERE
We recommend installing these kits on bicycles with a 1 inch diameter seat tube and with a 1-1.25 inch diameter on the down tube.
We have a gallery available on our website and you'll be able to view a selection of bicycles that these engines have been installed on.
You can also print off a sample outline of the engine : CLICK HERE

Model : PK50B-SILVER
Engine type :
Single cylinder, air-cooled, 2-stroke
Power * Rotary Speed
Rated Power :
1.15Kw / 5000r / min
(1.6HP/5000r/min)
Max Power :
1.6Kw / 6000r / min
(3HP/6000r/min)
Ignition Mode : CDI
Fuel type : Octane 89 and above
Lubrication Oil : 2 Stroke Synthetic Motorcycle Oil
Mixing Ration for Fuel and Oil : 16:1 for new sets (20:1 after running approx 500Km)
Spark Plug : Z4C 14MM
Fuel Consumption : 1.5L / 100Km
Clutch Type : Friction Plate / Dry
Speed Limitation : 30-35km/hour