Custom motorized bicycle engine kits that are easy to install. Fully warranted engines for bicycles drive the rear tire of human powered vehicle with confidence and dependability. Decades of happy customers, see our Motorized Bicycle History, use us for every day chores. or that 20 mile trek to work.

View our Bicycle Engine Specifications in 2 and 4 stroke varieties.  Call us at 406-652-6766 or order online at www.shop.bikemotor.com.

Pre-assembled motorized bikes (below) or custom pre-built engine systems to motorize virtually any bicycle, recumbent or tricycle. 

DBL click bicycle engine picture for info links.

See samples below or view bike archives at --- Custom Show Room--

Click "here" to view EASY INSTALL Guide

Imaging, 300 pound riders climb  8% grades, thanks to interchangeable gear ratios. Few people want to do over 40 MPH . But they can!

Clean, dependable, simple and quiet bicycle engines to motorize bikes. Engine systems start at $469. Fully aluminized at $619 with FOUR interchangeable gearing ratios!

Four top reasons people choose our design:

1. SAFETY: Shock absorbing engine mount handles the bumps. No belts, no chains to derail causing sudden lock-up. Far less maintenance, weight or risk. Peace of mind when sharing the road with cars and trucks.

2. STREET LEGAL: STILL a bicycle.  Engage and disengage engine while riding. That's the law. While disengaged the engine mount is just a bike rack. Cool, a real neutral. Pedal as much or as little as you like. We GUARANTEE IT!

3. VALUE: "SHIFT ON THE FLY" Simply engage while riding, the engine self starts! No hand pulling needed. No batteries. No troubles. No wasted gas. Add centrifugal clutch option for a net price increase of $89.

4. DIVERSITY: We guarantee a fit on your existing bicycle! Just tell us what bike you plan to use. Specialty bikes have become a regular with us. We offer complete, ready to ride,  fresh out of the crate, motorized bikes.

    

   Compare prices

   Add a complete Honda  4-Stroke engine to any  bike or chopper for $569!

   www.shop.bikemotor.com

   OR just click on picture. We offer tires, lights, luggage carriers, the works.

Consider AMERICAN Two and four cycle bike motors offering over 200 MPG!. Guaranteed sturdy design coupled with interchangeable gear ratios, and proven wet weather system outlasts historic frailties of belt and chain drive competition. They know it, you should too.

  Order ONLINE at www.shop.bikemotor.com

We welcome calls. 406-652-6766, or 406-962-8813 Speak with a motorized bicycle specialist and review bicycle engine laws. Got an engine of you own, but like our mounts? Buy just the mounts for $199 at http://www.shop.bikemotor.com

click on trike engine to enlarge

Popular Tricycle engine systems with Robin Hood 35 CC  

click on trike motor to enlarge

If you own a Recumbent TRICYCLE with Maxxis Tires, Suspension, dual disk brakes. We offer the bike engine for it! See utube video on the dimension edge channel. Called "40 mph trike".

 bike@imt.net 
Monster Bicycle Company
Billings, MT U.S.A. 59102
1-406-652-6766 (technician), or 406-962-8813(warehouse) or (cell)1-406-694-7261

Power any bike with our motorized bolt on kit, but be only a bicyclist by law. Systems are insured and quality tested before shipping. We offer parts, friendly service, and a 30 day return policy.

 Simple Simon Bicycle Engine System. $399.00

Order Online at

www.shop.bikemotor.com 

Save $200. Call 406-652-6766

Over 150 MPG!

Guaranteed Street Legal

Two assembled motorized bicycle choices included aluminum frame, 21 gears, front shocks.. Ready to ride.   Goes 30 mph. $699! WOW!

  DBL click bicycle engine pictures for info links. Fully Assembled Freight.

Beach Cruiser as shown with engine just $699.

Bikemotor offers  frame and color choices. Men's and Women's frames. DBL Click Picture for more info...

 See this bike on U-tube on the dimensionedge channel!  

HOW ABOUT A 

Authentic Schwinn Sting Ray Spoiler with "Four Legged Freak Springer" 
 front suspension, DUAL DISK BRAKES, Special edition aluminum frame.

Guaranteed clean, unopened, with original manuals and a neat Sting-Ray history booklet. Only 5 left, and there is nothing on the market even close. $1744.00

WOW!!!

True collector item! Ships in 2 boxes or by palate.

Email edge@bikemotor.com. or call 406 652-6766 for quote.

The Simple Simon Engine design was born to ride this bike.

Add a bike engine to your Day 6 bike!

ENCORE ENGINE SYSTEM:

with "shift on the fly" technology. Everything is included. We guarantee the fit too.  

So "Let the good times roll!"

 Thank-You for you consideration.