With the BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Engine Kit you’ll be taking your motorized bike build to the next level. This multi-purpose gasoline engine kit has an automatic centrifuge clutch. There are two different starting methods, pull-start or electric start, allowing great flexibility in operation. This new, well-designed electric engine kit offers several improvements over previous models. Enjoy the benefits of more horsepower, easier operation and a lower technical dysfunction rate compared to other 2-stroke and 4-stroke engine kits out there.

If you're an experienced rider ready to take your hobby to the next level with a faster engine, look no further than the BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Engine Kit. This engine kit gives you the power and performance you need with the latest upgrades such as high-quality Japanese clutch components and crank bearings. It's specifically designed for speed so it's the ideal upgrade for serious enthusiasts ready to take the next step in terms of performance. Every single electric engine kit is manufactured to the highest quality standards so our customers get the best possible products. But beginners and pro riders alike can enjoy the security and peace of mind that comes with a 6 month warranty on your new engine kit.

BBR Tuning 66/80cc Bullet Train Motorized Bicycle Engine Kit Includes:

1. BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Engine
2. Low Profile Carburetor
3. Upgraded Chrome Muffler
4. Drive Chain Idler Pulley
5. Top Quality Japanese 202 Main Bearings
6. 415 Bike Engine Drive Chain
7. Wide Crank Assembly (bottom bracket not included)
8. Drive Chain Guard
9. 2-Stroke Spark Plug
10. Twist Throttle and Cable With Grip
11. 1.5L Black Teardrop Gas Tank
12. Fuel Line
13. Gasoline Tank Switch
14. Sprocket Clamp Assembly
15. 40 tooth Drive Sprocket
16. High Quality Japanese Bearings on Both Ends of Crank
17. All Required Hardware
18. Kill Switch
19. Complete Digital Installation Guide; Downloadable version here

The BBR Tuning 66/80cc Bullet Train bike engine kit is about 8.5" Height x 7" Length 7" Width, while the extra large cylinder head itself is about 5.75" Length x 5" Width x 2.37" Height. 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)
• 25-40 mph depending on the gear ratio and weight
• Fuel Economy: 100-150 miles per gallon
• Bore and Stroke: 50mm x 40mm

Please note: Sprocket Clamp Assemblies included with Bullet Train 66/80cc, BBR Tuning 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.

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 "100cc", the true displacement of the bicycle engine is 78.6cc. Down through the years China bicycle engine manufactures have advertised their biggest engine as 100cc, therefore we have listed them in the same way on our website. 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 "100cc" engine kits on the market today are actually 78.6cc in displacement size if measuring by US standards.

BBR Tuning Engine Kits require a pre-mixed fuel ratio of 40:1 (3.2oz of oil to 1 gallon of gas)

• Recommended Gas Grade: 87 Octane
• Recommended Oil: Maxima Scooter Pro 2-Stroke Synthetic Motor Oil 1 Liter

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).

Product Requirements

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”).

Attention: This kit does not come included with a bottom bracket assembly. If the bicycle you are converting has a 1-piece crank, you will need to purchase a Bottom Bracket Assembly. If your bicycle has a 3 piece crank, you may not need this piece. However some bicycles with 3 piece cranks may not be compatible with the wide crank assemblies included with this kit.

Due to the design of this engine, most parts (including cylinders, pistons, cranks, and gaskets) and performance upgrade parts (including upgraded mufflers, carburetors, cylinder heads, and case covers) do not fit on this engine. DO NOT purchase parts or performance upgrades designed for non-electric start 2-stroke bicycle engine kits

*Note: 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.

** Also note: Sprocket Clamp Assemblies included with BBR Tuning 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.