66/80cc PK80 2-Stroke Bicycle Engine Kit

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’re looking for a performance engine that'll last, look no further than our 66/80cc Silver PK80 bicycle engine kit! Perfect for those comfortable with faster engines and have a desire to get up and go, the PK80 bike engine kit will have your ordinary beach cruiser soaring down the street . There's no rope pulling needed and you can stop or start the engine as you ride: just pedal the bike normally and start the engine by releasing the clutch lever.

All of the PK80 bike engines feature the latest upgrades, including Japanese bearings and clutch components. We make certain that all of our manufactures abide by strict quality control assurance measures and use the highest quality material so that we can make certain that all of our customers get only the best. Made for experienced riders and builders, our PK80 66cc engine kit is ready soar- are you?

 ** Please note: Sprocket Clamp Assemblies included with PK80 2-Stroke 48cc and 66/80cc, and 4-Stroke 49cc bike engine kits come with only 1x set of metal plates. Older production of these assemblies included 2x sets, but from testing and redesigning, existing engine kits and engine kits in the future will only require 1x set. This redesigned assembly helps secure your rear wheel sprocket better than in previous production.

On top of our strict quality assurance measures, we also back our engines with an industry leading 6 month warranty

Product Dimensions and Specifications

The PK80 66/80cc engine kit is about 8.5" height 7" length 5" width. The bike engine kit fits on standard, male frames with tubing of 25mm to 29mm in diameter. Larger frame sizes require drilling into bike frame with a stationary bolt and use the universal face plate to mount the front of the engine.

2.75 HP (horse power)

25 to 40 mph depending on the gear ratio and weight

Fuel Economy: 100-150 miles per gallon

The engine chain does not interfere with your current drive chain and peddling because it rides on the opposite side of the bike sprocket.

Product Requirements

Installation is a breeze! The rider only needs some basic hardware skills, tools, and around 2-3 hours for installation and fine tuning adjustments (Note: Seller is not responsible for misuse or this kit or any warranty after installation).

*Note* CNS Carburetor upgrades will require extra material to fit flush around the manifold. This can be remedied by wrapping the manifold with electric tape or using PVC to fill in the gap between the carburetor port and the maifold. 

 Fits Most 26" Wheeled Bikes (Mountain, Cruiser, Chopper, Road) with V-frame. The frame should have 9-11” of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1”).

Package includes *(Products pictured may come in different colors but does not hinder performance.)

1. 2011 Silver PK80 66/80cc 2-Stroke Engine

2. Low Profile Carburetor

3. Upgraded Chrome Muffler

4. Complete Clutch Cable Assembly with Clutch Wire Clip

5. Drive Chain Idler Pulley

6. Top Quality Japanese 202 Main Bearings

7. 415 Bike Engine Drive Chain

8. Drive Chain Guard

9. 2-Stroke Spark Plug

10. Electron Ignition Coil (CDI)

11. Locking Alloy Clutch Lever

12. Upgraded Twist Throttle and Cable With Grip

13. Updated 1.5L Black Teardrop Gas Tank (approx. ¼ of a gallon)

14. Fuel Line

15. Throttle Cable

16. Gasoline Tank Switch

17. Sprocket Clamp Assembly

18. 44 Tooth Chrome Drive Sprocket with 9 Holes

19. Large Spring (Heat Shield Spring)

20. Extension Spring (Recoil Spring)

21. High Quality Japanese Bearings on Both Ends of Crank

22. Kill Switch

23. Magneto

24. Required Hardware and Gaskets

25. Bonus: Spark Plug Removal Tool (While Supplies Last)!

26. Bonus: Standard Universal Bracket

27. Complete Easy to Follow Installation Instructions

Disclaimer: Operating this motorized bicycle and bicycle engine kit involved some risk of serious bodily injury. Buyer accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs and damages. Seller is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and not for on/off public roads.

Disclosure of accurate engine size: While we have chosen to use the long standing factory branding engine size of "80cc", the true displacement of the bicycle engine is 66cc. Down through the years China bicycle engine manufactures have advertised their biggest engine as 80cc, therefore we have listed them in the same way on our website. However, the bore and stroke of an 80cc being 47x38mm equals 66cc. Therefore the true displacement of the 80cc bike motor is 66cc. In the west, the volume of a cylinder is calculated by using the formula Volume = Pi x Radius Squared x Stroke. However, in the east the displacement of an engine includes the area of the cylinder head's combustion chamber as well as the volume of the cylinder. Therein lies a discrepancy between measuring standards by the manufactures in China with those in the United States. However, all "80cc" engine kits on the market today are actually 66cc in displacement size if measuring by US standards.