BBR Tuning 80/100cc 2-Stroke Motorized Bicycle Kit

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BBR TuningSKU: FH-BEK100

FREE SHIPPING to Continental US
FREE 6-Month Warranty

Sale price$277.71 Regular price$349.95


Ready to start really burning rubber? The BBR Tuning 100cc Motorized Bicycle Engine Kit is one of the most powerful 2-Stroke motorized bicycle engines out there, outperforming even the most supped up 66/80cc motors in torque and top-end speed. If you're looking for some major power without spending an arm and a leg on a pre-ported engine with all the bells and whistles, this engine kit is what you need.

1-Piece Cylinder

The 1-piece cylinder offers you more consistent, even torque than 2-piece cylinders. Coupled with a 50mm bore and high, these engines carry more weight, run cooler, start much easier, and keep your power output more consistent than other 2-stroke bike motors.

High-Performance Components

A high-performance engine is nothing with components to back them up. This kit comes with upgraded components to increase this engine's longevity and performance, including...

  • Yamaha-style high-performance CDI for more consistent spark.
  • Super magneto for flawless starts every time.
  • Speed carburetor for increased speed and torque.
  • Pre-drilled ports in the clutch plate for smoother engaging/disengaging.
  • Upgraded allen studs all around the engine make this a secure, long-lasting engine.

Balanced Crank

Unlike inferior 2-strokes with barely balanced cranks, this crank is balanced and paired with upgraded crank bearings. The stuffed crank case sits tight to the crank, which helps increase the compression of your motor.

** Please note: Sprocket Clamp Assemblies included with BBR Tuning 2-Stroke 48cc, 66/80cc, and 100cc, as well as 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 BBR Tuning 100cc bike 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.

  • 3 HP (horse power)
  • 30-40 mph depending on the gear ratio and weight
  • Fuel Economy: 100-150 miles per gallon
  • Bore and Stroke: 50mm x 40mm
  • Average Power: 1.8kw-1.9kw/8000r/min

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

Complete Digital Installation Guide

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

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).

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”).

BBR Tuning 100cc Motorized Bicycle Engine Kit Includes:

  • BBR Tuning 100cc Motorized Bicycle Engine 3+ HP Engine with one piece cylinder/head
  • 50mm Bore, 40mm Crank Stroke
  • NT Carburetor
  • Angled LD Z8C spark plug
  • Super magneto
  • Yamaha-style high performance CDI
  • Upgraded allen bolts
  • Balanced crank w/ upgraded bearings
  • Stuffed crank case (thicker crank case around bearings)
  • 40mm Intake Manifold
  • Round exhaust port - 21 mm diameter
  • High wrist pin piston
  • 89mm crank rod

Mounting Kit & Accessories:

  • High-performance CDI with Yamaha components
  • Black teardrop gas tank (1.5L) w/ new fuel cap, fuel valve, fuel filter, and fuel line
  • 415 Heavy duty chain
  • Chainguard
  • Chain tensioner w/ bearings
  • 21mm Chrome Exhaust Muffler
  • Complete throttle assembly
  • Clutch Lever and Cable
  • Drive sprocket removal tool
  • Spark plug removal tool
  • Universal Mounting Bracket
  • 9 Bolt Sprocket Clamp Assembly

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 "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.

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Customer Reviews

Based on 38 reviews
New build

My latest build. Springer forks , jet black paint , and of course BBR 100 . love it. This motor runs so good top end . Clean through the rpm range , all out cranking on top end no missing or breaking up top end like other brands. This 100 cc is now the only motors on my builds. Still maintain this is best motor kit to buy. I live in huntington if you got a factory motor bring it out let's ride and race .

Another bbr 100

This is another great build. Topped off with ape hangers ,custom paint job , chrome emblems custom seat, vintage back rack , hand made trusses on front end , and of course BBR 💯... 36 tooth sprocket . This motor is fast. Try it out a d see for your self. I go all out on these builds , and I am convinced the bbr 100 is best kit on the market. Runs better top end , with 36 tooth sprocket still has plenty bottom end for hills .

Shannon j
Bbr bronze edition

Another build with bbr 100 cc . Love the motor , hope you guys like the pick. The color I'd burnt bronze. Also picked up the springer front end on here. Also love it. Well made too. Nicely packaged so the chrome was not scratched.

Shannon j

Another BBR 100. , another bike , another build . Love this motor , I will put this motor up against any factory motor kit . Love the top clean power , Love the 100 cc low-end. I run 36 tooth sprockets still have enough low end


It's great I had no problems with it.

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