BBR Tuning V2 80/100cc 2-Stroke Motorized Bicycle Kit

Memorial Day SaleSave 10%
BBR TuningSKU: FH-BEK100-V2

FREE SHIPPING to Continental US
FREE 6-Month Warranty

Sale price $314.96 Regular price $349.95


Get ready to leave people behind in a cloud of dust! The BBR Tuning V2 100cc Motorized Bicycle Engine Kit is an upgraded version of the BBR Tuning 100cc Motorized Bicycle Engine Kit and is now 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 are looking for tremendous power and speed without breaking the bank, this engine kit is the right one for you.

  • 2-Piece Cylinder With Extra Large Fins: The engine kit comes with a 2-piece cylinder with extra large fins that promote superb cooling in the engine. Unlike other 2-stroke bike motors, this engine keeps your power output more consistent, runs cool, starts easily, and carries more weight.

  • Extra Large Cylinder Head: Most 2-stroke engines have the standard size cylinder head, however, the upgraded BBR Tuning V2 100cc engine comes with a 30% larger cylinder head.  The larger cylinder head lets your engine breathe at higher RPMs, making it ideal for modifications and racing. Cylinder Head Dimensions: 5.75" Length x 5" Width x 2.37" Height.

  • Built-In Reed Valve: The cylinder body comes with a fully built-in reed valve increasing air intake to the crankshaft space and improving the performance of the engine.

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...

  • High-performance Speed carburetor with extra large jets that are specifically tuned for a 100cc motor.

  • Yamaha-style high-performance CDI for more consistent spark.

  • Super magneto for flawless starts every time.

  • 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

This 2-stroke engine has a balanced crank and upgraded crank bearings.  It comes with a stuffed crankcase that sits tight to the crank and in turn, increases motor compression.

** 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 V2 100cc bike engine kit is about 8.5" Height 7" Length 5" 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.

  • 3.5 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

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).

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 V2 100cc Motorized Bicycle Engine Kit Includes:

  • BBR Tuning V2 100cc Motorized Bicycle Engine 3+ HP Engine with 2-piece cylinder/head
  • 50mm Bore, 40mm Crank Stroke
  • High-Performance Speed Carburetor
  • Vertical 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 13 reviews

Starts right up everytime. Taking it easy for break in but I can tell it's got power. Can't wait to let it rip.

Great performance and nice power

Wonderful motor, very nice power band and great power. I’m 270lbs and it pulls me up hills like nothing this is with me breaking in the motor. Very steep grades

Lance Barton
Talking about true cc measurements the phantom 85 is hard to beat.

Except the phantom 85cc.its a true 85cc engine and I can hit speeds up to 50+ stock.the only downside is they don't leave you any room for building up your engine.

v1 80/100cc engine kit review

one of the best engine kits ive ever had is fun to ride. and fun to put together i had a few issues with the pens in the piston not being there soo i asked customer support for help and the support guy was freddy and he was very helpfull and uderstanding and helped me with the issues so im leaving a 5 star review. would heavily recommend getting a engine kit from them if your a starter of more into bike engines there very nicely made engine kits. this engine kit has all the power for hills and and speed

High quality low speed

I bought this motor more for power than speed I have a 36 tooth sprocket on my bike and before that I had a 28 to sprocket and my top speed was 26 miles an hour going downhill. The engine is perfect for getting around town but wouldn't want it for racing. I have two 80cc motors of which I have top both out at 40 mph and when I bought this on a Black Friday sale it said that it was 40 mph stock I can't even get up to 8 mph with the sprocket that comes with it. Had to remove the cap to the muffler drill holes in the carburetor and get a smaller sprocket just to get it up to 26 but that's besides the point everything seems like it's very high quality I haven't had any issues with anything other than chain.

Hi Lawrence,

Thank you for sharing your feedback.

We're delighted to hear about your current motor, but we sincerely apologize for the issue you're currently facing. Our commitment is to assist our customers in achieving great satisfaction with our products and services.

Please reach out to us directly to address your concerns at 1.800.317.0479 or via email at We are here to help!


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