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79cc Monster 80 COMPLETE Bike Engine Kit - 4-Stroke

A bigger kit to get your bike moving. This setup includes a CNC single speed transmission with a  ⅝ shaft keyed centrifugal clutch. Using the motor gas tank and exhaust which both can be upgraded (see 79cc Monster 90 kit).

4 Stroke engine kits are very different from 2 stroke kits in many ways. Building a 4 stroke bike is a little more involved then the two strokes, the extra effort is worth it. Pull start engine, not push start like the 2 strokes. Overall this type of engine is more reliable with more power and torque. With some of the larger cc motors, the top speeds far exceed the 2 strokes. Since these motors are larger in cc they are also larger in size and weight. Almost all bicycles will need to use a wider crank setup to clear the motor, the stock arms and pedals will hit the motor when pedaled as a regular bike. One piece cranks will also require a bottom bracket conversion set as well (not included).

This style of the engine might need slight modification to the bikes and will not fit all frames.

Advantages of 4 Stroke Bicycle engine kits:

• Use straight gas (no mixing oil with gas)
• More Horsepower
• More Torque
• Quieter Engine

This complete kit includes:

1. 78.5cc - 79cc 3HP OHV GasBike Horizontal Shaft Gas Engine 
2. Transmission for 78.5cc - 79cc OHV GasBike Horizontal Shaft Engines
3. Heavy Duty Bicycle Mounting Kit for 78.5cc - 79cc or 212cc OHV Predator Horizontal Shaft Engines
4. Throttle Handle
5. Throttle Cable - 50"
6. 44 Tooth Sprocket
7. Pineapple Bushing Kit
8. 415 Heavy Duty Chain
9. Idler Pullet Chain Tensioner with 2 Bolts
   
10. Throttle Linkage
    
    

The construction and engineering on this unit have been upgraded for improved durability and service life. This tough gas engine features a durable cast iron cylinder that withstands wear and abuse, fuel shut off for safe transport and gas saving overhead valves for a cooler, cleaner performance. The horizontal shaft design makes this an ideal all-purpose gas engine.

• Upgraded engineering and construction for improved lifespan
• Durable cast iron cylinder withstands wear and abuse
• User-friendly controls for easy starting and operation
• Fuel shut off for safe transport
• Ball bearing support shaft for long life
• Recoil start

ENGINE SPECS:

TRANSMISSION SPECS:

1. 79cc Transmission plate with complete sprocket and shaft assembly (Sprocket = 22T and 9T)
2. 11 tooth, #415 sprocket Centrifugal Clutch
3. Complete hardware for mounting the transmission plate on the engine (Screw thread size is 5/16-24)
4. #415 Chain, 41 Link with a master link

NOTE: NO MANUAL INCLUDED.

Our gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.

If you need help with installation or troubleshooting, kindly use our Builder Locator to find builders near you. Builders are experts with motorized bicycles.