Why Shop Spookytooth?Click Here

No Sales Tax! excludes CA
Product Videos

4 Stroke Stealth Motorized Bicycle DIY Kit Item# ST-STEALTH-4S

OUR PRICE: $594.95
List Price: $999.99

Our 4-Stroke Stealth Motorized Bicycle is the sleekest bike you've ever seen! The bicycle is black from heat to toe, and its engine has the ability to be sprayed with high temperature black paint for that shadowy look. The 49cc 4-stroke Flying Horse engine kit equipped with this bike gets up to 25mph and will blow past the competition with its heavy amount of torque. This bike might be stealthy, but you'll stand out among the rest of your riders!

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 15 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.  

Note: This is a Do-It-Yourself motorized bicycle. Gas tank installation may require modified mounts. The bicycle and the engine kit ships in separate packages from our multiple warehouse locations. The Flying Horse Pull Start Engine and the 4-Stroke Pull Start Engine are wider than our standard 2-stroke engines. As such, depending on your bicycle, it may require the use of an extra wide crank to clear the added width.


Best Price Guarantee

BikeBerry.com is committed to providing our customers with the best price available online! At BikeBerry.com we work hard to offer the most competitive pricing available, but if you find a lower price online, let us know and we'll match it! In fact, if you find a lower price within 30 days of your original purchase date, we'll refund you the difference.

Complete the Best Price Guarantee form below to request a quote or price difference refund.

Best Price Guarantee Terms and Conditions:

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.

BikeBerry.com reserves the right to verify another online company's product availability and price before issuing a price match.

BikeBerry.com does not match auction websites or refurbished products.

The Best Price Guarantee does not apply to obvious pricing errors or clearance/close-out items.

Best Price Guarantee applies to the total purchase price of the item. Total purchase price includes shipping, taxes, or other discounts.

  • * Required Fields


Customer Reviews

Greay Review by Sam
Excellent, love mine. (Posted on 9/20/2017)

Write Your Own Review

You're reviewing: 4 Stroke Stealth Motorized Bicycle DIY Kit

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars

Customers Q & A

Ask a Question
Don't see the answer you need?Ask a Product Expert! The answer will be emailed to you and then posted here.

There are no entries.

Have a question? Call 888-621-0455
Authorize.Net Merchant - Click to Verify  SSL Secured