SKU: 83969298490
pedal bike with engine

pedal bike with engine 79cc Monster 80 Bike Engine Kit

Sale price$25.29 Regular price$28.10
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Ships within 48 hours · Estimated delivery Sep 30 - Oct 5

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Description

pedal bike with engine 79cc Monster 80 Bike Engine KitNOW IN STOCK! 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 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

NOW IN STOCK!


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:

Name 3 HP (78.5cc - 79cc) OHV GasBike Horizontal Shaft Gas Engine 
SKU 69733
Brand GasBike Engines
Engine displacement (cc) 78.5cc - 79cc
Horsepower (hp) 3
Maximum speed (rpm) 3600 RPM
Maximum Torque (ft. - lbs.) 3.5 ft. lbs. @ 2500 RPM
Mounting pattern 102mm L x 104mm W - 61.5mm W (4 in. L x 4.9 in. W - 2.4 in. W )
Mounting type Horizontal
Quantity 1
Shaft rotation direction Counter clockwise
Sound rating (dB) 104 dB
Start type Recoil start
Product Height 8.5 in.
Product Length 12-1/4 in.
Product Weight 24.25 lbs / 11 kg
Product Width 11-1/2 in.
Shaft length (in.) 2.4 in. (60.1mm)
Shipping Weight 26 lbs
Stroke length (in.) 37 mm




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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 83969298490

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4.2 ★★★★★
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C
Verified Purchase
C
Carnegie, US
★★★★★ 5
Reliable and Affordable Timekeeping for an Active Lifestyle
Color: Black/Gray
I recently purchased the Timex Unisex Ironman Classic 30 34mm Watch, and it has exceeded my expectations in terms of functionality, durability, and style. First and foremost, the watch's design is sleek and unisex, making it suitable for a variety of wrist sizes and both casual and sporty occasions. The 34mm face strikes a perfect balance, providing clear visibility of the time without feeling bulky on the wrist. One of the standout features of this timepiece is its reliability. The Ironman Classic 30 lives up to its name with a water resistance of up to 100 meters, making it suitable for swimming and other water-based activities. The durable resin strap and casing can withstand the wear and tear of an active lifestyle, ensuring longevity. The watch's functionality is where it truly shines. The digital display is easy to read, and the Indiglo backlight is a game-changer in low-light conditions. The 30-lap memory is a handy feature for tracking workouts or laps in the pool, while the countdown timer and alarm add practicality for daily use. Setting and adjusting the time and date are straightforward, thanks to the user-friendly interface. The watch also offers a dual time zone feature, making it a great companion for travelers. Battery life is impressive, providing long-lasting performance without the need for frequent replacements. This is a crucial aspect for those who rely on their timepiece during outdoor adventures or extended periods away from a power source. In terms of value for money, the Timex Ironman Classic 30 delivers outstanding features at an affordable price point. Whether you're an athlete, fitness enthusiast, or someone who simply appreciates a reliable timepiece, this watch is a solid investment. In conclusion, the Timex Unisex Ironman Classic 30 34mm Watch combines style, durability, and functionality seamlessly. It has become my go-to watch for both daily wear and active pursuits. I highly recommend it to anyone seeking a reliable and affordable timekeeping companion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2024
K
Verified Purchase
kkrome25
Houston, US
★★★★★ 5
The Best for Athletics
Color: Black/Gray
This is a sleek, light wristwatch that will not weigh you down with its bulk. Forget the gigantic profile of a "survivalist" wristwatch. This unisex model is svelte and slim, not adding much to the wake you generate while swimming, or the swing of your arms while running, or the wind as it passes around your wrists and hands while you are speeding by on your racing bike. This is only 34mm across, by 35mm tall, by 11.5mm thick. The wristband is 13mm at its median working width. Timex styling cannot be beat, and neither is the resin-rubber-like material. I don't know about you, but the price is something I take a good look at. I want a watch that is reasonably priced and high-quality. I don't want to spend $200 to $1000 on a watch and worrying about being careful with it. If it gets smashed, it's only $30 to $50, not a big loss, and the quality is way better than what they were making in the 1980's. These watches are made for athletics and the real world.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 14, 2025
W
Verified Purchase
Wise Shopper
New York, US
★★★★★ 4
Great watch, flimsy band
Color: Gray/Lilac
I bought this watch to replace a similar model because the band broke. I see this is a recurrent problem in many other reviews. However, I liked the watch enough to buy it again anyway. I found the new model easy to set, being fairly intuitive. So far it keeps perfect time. I use this watch mainly as a travel watch, and loved the dual time zone function. I am pleased that the newer model now has the ability to set 3 times zones instead of 2, which is an added bonus. The only con I see at this point is the flimsy strap. Unfortunately, the strap on this model is even thinner than on the previous one, and I wonder how long it will last. Also I wonder about the battery length. I think these watches may have been sitting around a long time. The setting showed 2012. I am afraid much of the battery life of the original battery may have already been used up and the battery may need replacing early. Only time will tell. The watch fits my small wrist fine and it is a little more attractive than the old model. I give it 4 stars instead of 5 only because of the band problem.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2016
N
Verified Purchase
Nikki Griffin Olive
Houston, US
★★★★★ 5
Great fit and quality!
Color: Black/Gray
Always love the quality of a Timex watch. Great fit for smaller wrists.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
G
Verified Purchase
greg_r
Chelsea, US
★★★★★ 5
Fine for a man (with skinny wrists)
Color: Black/Gray, Color: Black/Gray
I have an older mens ironman which has gotten a little beat up and needs replacing. The band is much longer than I need. The metal clasp sits off-center on the underside of my wrist, closer to the part of my wrist which curves around to the front. The too-long strap sometimes flops around and catches on things. I couldn't find a smaller-band mens version, so I tried this "womens" watch (picking the most manly-looking one, of course). I like it better. The band fits my wrist much better, with the metal band in the middle and no flop. I also like that the watch is lighter and the face and band are smaller and less bulky, so it is less noticeable when I'm wearing it (cycling weight weenies will appreciate this). The face is still large enough to be easily legible and contains all of the same great features as my mens ironman watch, plus the newer versions now have an hourly chime, nice! Other info: my wrist is ~17.5cm or ~7.0" around. On this watch, I use the 6th out of 9 slots on the band. On my mens ironman, I use the 3rd out of 9 slots. Weight: this one = 28g, mens = 39g. Pics show comparison of my prior mens ironman with this new "womens" ironman. Photo order is confusing (couldn't figure out how to change that). They are: (1) side-by-side, mens on left, (2) mens band (wider and clasp is off-center on my wrist, end of band hangs over the edge of my wrist -- too long for me -- catches on things), (3) womens band (less wide, clasp is more centered on my wrist and end does hang over edge of my wrist), (3) womens watch (smaller, and looks new), and (5) mens watch, looking a little beat up.
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Reviewed in the United States on August 5, 2017

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