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4 Stroke Bare Bones Motorized Bicycle DIY Kit Item# ST-BAREBONES-4S

OUR PRICE: $553.95
List Price: $999.95
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Simplicity is what we had in mind when designing the 4-stroke Bare Bones motorized bicycle. A great, strudy, yet simple frame holds the 49cc Flying Horse 4-stroke engine kit and gets up to 25mph with no problem. Unlike other DIY kits that have lots of extras that weigh the bike down and hinder the performance, this bike is light and a breeze to assemble. But don't let its simple design fool you- this bike's got power! Front end and back end, the 4-Stroke Bare Bones Motorized bike will get you on the road easily and perform just as well!

In a pound for pound comparison, 2 cycle engines, like the Flying Horse 2-Stroke, traditionally produce twice the power of 4 cycle engines. This means that a 2 cycle motor can pack twice the punch of a 4 cycle and can be produced smaller and lighter. This is beneficial when designing a power assisted bicycle. With the advancement of micro 4 stroke technology, all of this is changing. The new generation of micro 4 strokes, including the Flying Horse 5G 4-Stroke, are nearly as light and just as powerful as their 2 cycle counterparts. With a 4 stroke engine you won't have to mix oil with gas like you do with a 2 stroke engine, but you will need to change the oil about every 1,000 miles.  A 4 stroke doesn't need to cool off every half hour like a 2 stroke engine does, so you can run a 4 stroke all day long, even cross country.  A 4 stroke engine is generally cleaner and quieter than a 2 stroke as well as much more reliable. The technology costs more to manufacture, however, you will find that the reliability pays for itself many times over.  For fun, dependable transportation, get a 5G 4 stroke motorized bicycle!

The 5G engine kit boasts an astounding 150 miles per gallon and all day cruising speed of 30 miles per hour.  With a rope pull start for ease of use, these engines are designed for commercial and governmental use to consistently be ran at full RPM.

The 5G bicycle engine kit carries a 6 month warranty on the transmission, and a one month warranty on the engine.

In many states, the speed limit for gas and electric motorized bicycles (before you must have registration, license and insurance) is 20 miles per hour.  Our gas powered motorized bicycles are very strong and capable of being fast.  For motor vehicle standards, their emissions are clean.  They get at least 150 miles per gallon.  On a half gallon tank, the gas powered motorized bicycle can drive 75 miles before you need to refill the tank.

An understanding of mechanics, basic nuts and bolts, will be necessary.  Service parts are available through us.  

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Item must be the identical model from an authorized U.S. dealer. Specifically, the product must have the same U.S. manufacturer's warranty, model number, and contain the same components. BikeBerry.com will price match only in-stock products.

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Q: re 4 stroke motorized bike kit: ST-BAREBONES-4S 1) what kind of transmission/clutch? cvt? 2) is a push start possible? ie can you start the engine from the movement of the bike?

Posted On: 10/13/2015 By: j brown

A: Great question! We are glad that you contacted us here at BikeBerry.com to help answer your concerns! The engine used is a 49cc Flying Horse 5G Pull Start Bicycle Engine Kit- 4 Stroke. 48cc engine kit is about 9" height 9.5" length 7" width. The bicycle gas engine kit includes a mounting plate that fits on standard 25mm to 29mm frame tube. Larger frame size requires modification to the mounting plate and/or frame of your bicycle. Flying Horse 5G 4-Stroke bicycle engine kit offers (Flying Horse 2014 5G 4-Stroke Centrifugal Transfer Case (3:1 Gear Ratio)): 3-4 HP (horse power) 20 to 25 mph depending on the gear ratio and weight. Fuel Economy: MPG 100-150 miles per gallon Independent drive sprocket and chain does not interfere with your current drive chain and peddling can be restored with a wide crank assembly. Uses a pull start system to start the engine. Please feel free to contact us with any further questions or concerns you may have, we work Monday-Friday 8:30am-5:00pm PST, at 1.888.317.0479

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