66/80cc BBR Tuning Bullet Train Electric Start Engine Kit - Silver

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$307.47 after coupon


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.

This electric start engine fits most bicycle styles such as mountain, road and cruiser that have a V frame shape and 26-inch wheels. For ideal installation conditions, there should be 9 inches to 11 inches of clearance between the top bar and bottom bracket. The frame tube should have a diameter of about 1 inch (25 to 29 millimeters).

Product Features:

  • A simple installation can be completed in a few hours
  • Requires basic tools and moderate skill level to build
  • Allows for fine-tuning adjustments following installation
  • Includes in-depth instructional guide with installation details
  • Engine chain location on the opposite side of the sprocket doesn't interfere with current drive chain
  • Free shipping to the continental US

Complete Digital Installation Guide

Each BBR Tuning bicycle engine kit comes with a digital installation guide that takes you step by step through installing, adjusting, and fueling your brand new engine kit for the ride of your life.

Package 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 2-Stroke 66/80cc Bullet Train Electric Start Engine Kit is an ideal upgrade for experienced builders ready for more speed and a higher level of performance.

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.

Also note: 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

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.

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.

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.

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.

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Customer Reviews

Based on 54 reviews
Daniel Kern
Great kit for an old guy like me.

This is a great kit if you do not want to deal with a clutch and pedal start. The kit is a little harder to install than the 2-stroke pedal start kits but
nothing over the top. I added the proformance pipe but had to cut and weld to make it fit. I also was not crazy about the provided battery holders
so I did my own thing. It runs good right out of the box with no carb jetting. I would definitely purchace this kit again.

This engine kit is amazing

I highly recommend this kit to anyone who wants a good running easy to start and long lasting engine, I use this one a lot love this one over my other one I had and haven't had any problems with it

eric m ferrer

Excelent motor works very well and Quick delivery ,recommend the seller. Thanks..

Mark Wiley
Recent purchase

I love this kit. This is my 3rd one this year. Had a slight issue with the gas tank but bikeberry stepped up and made good and sent me a new one. Awesome stuff right there. Plan on buying more in the weeks to come. Thanks again bikeberry for your quick response.


Joel sheehe
Highly recommend

My first engine was a Chinese kit from Amazon, it worked very well, only thing I didn't care for was the pop starting it was a pain. Having to pedal and balance the bike while working the clutch and choke. So I found this electric start kit. Assembly is easy if you understand basic mechanics. This kit comes with everything you need to get started, minus the fuel. I've riden the bike for a couple years now. Only thing I've changed was the rear sprocket because 1. I don't want to pedal and 2. I live where there is a lot of hills. But the included rear sprocket is ok for majority of riders with balance of power and speed. The electric start option with pull start backup is the best set up so far!

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