JET SILVER 80CC 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 80CC ENGINE
These engines require less mounting space in your bicycle frame, and have more power compared to regular 80cc engines. These engines come with an extended clutch arm which makes clutching easier.

- HIGH QUALITY FUEL LINE
Improved fuel line is included with these kits which is much more resistant to weathering.

- 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.

This complete bicycle engine kit package comes with everything you'll need to motorize almost any regular 26" single speed or multi speed mountain bike or beach cruiser. You'll still be able to pedal the bike and ride like normal, or start the engine by releasing the clutch lever, and let the bike do the work. There's no rope pulling needed. You can stop or start the engine as you ride with the included kill switch. Twist grip hand throttle controls speeds up to 32 kph. Off-road sprockets are available to increase the speed to over 50 kph. This installation kit comes with a 44 tooth 9 hole 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 the bicycle gears.

With the included clutch handle, you maintain full functionality of the original bike. Pedal, shift, and ride your bike like normal. The engine kit only adds about 19lbs to your bike. When you wish 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 a few hours to install using the easy-to-follow 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 1.125 inch diameter seat tube and with a 1-1.5 inch diameter on the down tube.

NOTE: Some modification may be necessary on some bicycle frames.

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: PK80J-SILVER

Engine type:
Single cylinder, air-cooled, 2-stroke
Power * Rotary Speed
Rated Power:
2.0Kw / 5000rpm
(3HP / 5000rpm)
Max Power:
3.5Kw / 6000rpm
(5-6HP / 6000rpm)
Ignition Mode: CDI
Fuel type: Octane 87 and above
Lubrication Oil: Standard 2-cycle / Synthetic 2-cycle
Mixing Ration for Fuel and Oil: 16:1 for new sets (24:1 after running approx 500 Km)
Spark Plug: Z4C 14MM
Fuel Consumption (approx): 2.0L / 100Km
Clutch Type: Friction Plate / Dry
Speed Limitation: 32 kph

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What's included:

Customer Reviews:

I live in Arkansas, U.S. and after waiting a few days for the kit to come in, I was very anxious, to say the least. I installed this kit on a mountain
bike in about 5 hours and it is the best $135 I have spent in my life! Very simple install, tons of fun, and runs great with good speed! I am
thinking about buying a couple more soon.

A very good over-all engine, that accelerates fast and has a good top speed. Might take a while to build, but make sure you follow all instructions
and the kit will be well worth your time and money!

Nice Product, decent quality, fun to build and fun to drive! Started easily on the first attempt. Had a minor problem with a leaking fuel filter and
Andrew at Zoom Bicycles responded promptly and is sending a replacement. Excellent customer service! I'm very pleased with my motorized Zoom
bicycle!