PLEASE NOTE: THE FOLLOWING ITEM IS PREORDERED: EXPANSION CHAMBER
PREORDER ITEM WILL SHIP MID-OCTOBER 2021. ALL OTHER ITEMS IN KIT WILL SHIP RIGHT AWAY.
DUE TO UNPRECEDENTED DEMAND THIS IS A LIMITED STOCK ITEM - FIRST COME FIRST SERVE. ORDER NOW FOR GUARANTEED AVAILABILITY, EXPECTED TO SELL OUT.
THE ENGINE KIT COMES WITH A STANDARD MUFFLER THAT CAN BE USED WHILE AWAITING ARRIVAL OF THE EXPANSION CHAMBER.
When you’re in need of an engine with some serious power, the BBR Tuning Stage 4 Performance Engine Kitis the engine kit for you. With this performance package, you’ll get everything you need to get tons of power, from top-end speed to bottom-end torque. Outfitted with an Expansion Chamber for a smooth ride, and NGK spark plug and a high-performance head for major compression, and a high-performance carburetor for optimum speed, you’ve got a motor that’s ready to perform and more importantly, a motor that’ll last.
Compression of a Performance Motor with the Carburetor to Back it Up
With the BBR Tuning High-Performance head leading the way, this engine will give you more compression than ever. More compression means an increase in speed and pulling power, so not only will you go faster but those hills and inclines won’t give you a problem anymore. And if that wasn’t good enough, its tall heat syncs let your engine cool faster, letting your ride longer than ever.
Add to that the High-Performance Carburetor, and you’ve got yourself a speed machine. Its bigger jets will give your engine more fuel, and its air filter will let your carburetor breathe better than ever. You’ll definitely need a performance carburetor if you’re looking to run a high-performance head, and we made sure that this BBR Tuning package had that standard.
The Smoothest Running Engine You’ve Ever Felt
With an Expansion Chamber on this motor you can count on a smooth ride. Ever wonder why it feels so rough when you ride? That’s partially because the stock muffler restricts airflow coming out of your engine, and if you’re using performance parts you’ll need something that won’t limit your motor from expelling all that exhaust it creates.
Enter the Expansion Chamber. With no baffle in the chamber, there’s nothing limiting airflow except at the exhaust port. However, the banana shape of this muffler helps circulate air around the chamber so that instead of a large amount of smoke trying to go through a small hole, there’s a smooth flow of air coming from the chamber itself. Not only will you get a little bit of torque of this muffler, but you’ll also get a smoother ride, too.
PLEASE NOTE: Top end assembly required for this engine kit.
The BBR Tuning 66/80cc 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 the bike frame with a stationary bolt and use the universal face plate to mount the front of the engine.
2.75+ HP (horsepower)
25 to 40 mph depending on the gear ratio and weight
Fuel Economy: 100-125 miles per gallon
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 a 1”).
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.
- Silver BBR Tuning 66/80cc 2-Stroke Engine
- Bonus- BBR Tuning Billet Aluminum High-Performance Cylinder Head 66/80cc
- Bonus - 66/80cc High-Performance Carburetor
- Bonus – Expansion Chamber
- Bonus - NGK B5HS Spark Plug
- Complete Clutch Cable Assembly with Clutch Wire Clip
- Drive Chain Idler Pulley
- Top Quality Japanese 202 Main Bearings
- 415 Bike Engine Drive Chain
- Drive Chain Guard
- 2-Stroke Spark Plug
- Locking Alloy Clutch Lever
- Upgraded Twist Throttle and Cable With Grip
- Updated 1.5L Black Teardrop Gas Tank (approx. Γàû of a gallon)
- Fuel Line
- Throttle Cable
- Gasoline Tank Switch
- Sprocket Clamp Assembly
- 44 Tooth Chrome Drive Sprocket with 9 Holes
- Large Spring (Heat Shield Spring)
- Extension Spring (Recoil Spring)
- High-Quality Japanese Bearings on Both Ends of Crank
- Required Hardware and Gaskets
- Kill Switch
- Complete Digital Installation Guide
- Spark Plug Removal Tool (While Supplies Last)!
- Standard Universal Mounting Bracket
On top of our strict quality assurance measures, we also back our engines with an industry-leading 6-month warranty
Disclaimer: Operating a motorized bicycle and/or bicycle engine kit carries a risk of serious bodily injury. The rider accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs, and damages. BikeBerry.com is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit.
** Please 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 the previous production.
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 equal 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.
Customer ReviewsWrite a review
It was easy and fun to install but after a few days of using it the throttle cable broke. I hope it covered by a warranty. Not sure tho. But it was fun while I had it working hope to have it back up and going soon. Also need to buy a set of rims with the disk breaks because the rim breaks don’t last long.
BBR Tuning Racing Series Stage 4 66/80cc 2-Stroke Engine Kit
My new stage 4 was everything that had promised. Easy build easy build, runs great!
Bike berry you're the best. I couldnt ask for a better motor thank you once again
The kit itself is fantastic. No issues what so ever with it. Engine was clean and went together very smoothly. The ports weren’t near as bad as others have said as far as the machining goes. Maybe that’s a case by case basis, but mine came in pretty clean. If I could think of any complaint that would actually help to educate people, it would be instructions. The are none. The “digital manual” is a YouTube video that doesn’t give a lot of detail. There are all sorts of other videos out there that can get you through this though. But I think a company like BikeBerry should be able to produce something better than a 20 minute video with a pro builder doing it. I mean most people who are building these things are doing so for their first time. But that’s the only real complaint I had. Which will be resolved with experience. Now the kit itself- great. Everything was there. Everything was as it should have been. Make sure you get a chain tool to adjust the length of the chain. Also make sure you have a steel drill bit for your throttle assembly and plenty of zip ties. This is my first build so I am sure the next will go much smoother. Looking forward to doing business with BikeBerry again in the future.