BBR Tuning Racing Series Stage 3 66/80cc 2-Stroke Engine Kit

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FREE 6-Month Warranty

Engine Color: Silver
Sale price $224.96 Regular price $249.95


Building a high performance engine just got a lot easier with the BBR Tuning Stage 3 Performance Engine Kit Package. With this performance package you’ll get everything you need to get some major power from your motor whenever you hit the throttle. Complete with a high performance head, and NGK spark plug, as well as a high performance carburetor, this engine kit is what you need when your rides need some more power when you hit the throttle.

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 Spark Plug Dream Team Included

What would a performance engine be without a high quality CDI? If you’re giving your engine more fuel it needs a better spark than your stock CDI will give it. The Stage 1 CDI included with this package was made for performance, with its high performance wire that offers you better connectivity than ever and a high quality Japanese NGK spark plug cap.

Standard spark plugs can’t handle all that performance quite well, so we paired this CDI with an NGK B5HS spark plug that’ll give you the best, most consistent spark you’ve gotten out for your engine in quite some time.

PLEASE NOTE: Top end assembly required for this engine kit.

Product Details

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 bike frame with a stationary bolt and use the universal face plate to mount the front of the engine.

2.5+ HP (horse power)

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).

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”).

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. Silver BBR Tuning 66/80cc 2-Stroke Engine
  2. Bonus- BBR Tuning Billet Aluminum High Performance Cylinder Head 66/80cc
  3. Bonus- 66/80cc High Performance Carburetor
  4. Bonus- NGK B5HS Spark Plug
  5. Low Profile Carburetor
  6. Upgraded Chrome Muffler
  7. Complete Clutch Cable Assembly with Clutch Wire Clip
  8. Drive Chain Idler Pulley
  9. Top Quality Japanese 202 Main Bearings
  10. 415 Bike Engine Drive Chain
  11. Drive Chain Guard
  12. 2-Stroke Spark Plug
  13. Locking Alloy Clutch Lever
  14. Upgraded Twist Throttle and Cable With Grip
  15. Updated 1.5L Black Teardrop Gas Tank (approx. Γàû of a gallon)
  16. Fuel Line
  17. Throttle Cable
  18. Gasoline Tank Switch
  19. Sprocket Clamp Assembly
  20. 44 Tooth Chrome Drive Sprocket with 9 Holes
  21. Large Spring (Heat Shield Spring)
  22. Extension Spring (Recoil Spring)
  23. High Quality Japanese Bearings on Both Ends of Crank
  24. Required Hardware and Gaskets
  25. Magneto
  26. Kill Switch
  27. Complete Digital Installation Guide
  28. Spark Plug Removal Tool (While Supplies Last)!
  29. 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. is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit.

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 41 reviews
Stage 3 build

The only problem I had was with the hardware for the back sprocket so I went to the hardware store and bought some quality bolts and locknuts that solved the problem now I might upgrade to the arch chain tensioner it's a great kit

Gage Hoft

Runs smooth didn’t like the throttle cable tho

Stephen Brooks
Absolutely love this bike kit

If you purchase the smaller sprocket and run a 26”wheel you can get close to 40 mph.
The only thing I wish is the gas tank was a little more robust . But all and all I love this kit, the stage 3 is the best I’ve purchased

Jesse Jacobs
Great engine.

Was very excited to receive stage 3 BBR tuning racing series engine. Although FedEx dragged tracking number along. Couldnt find in system. Then bam it was delivered.
I had previously purchased BBR tunning F2 thruster expansion muffler. Wrap with titanium header exhaust wrap. Your leg will appreciated it. Instant power. Running 16:1 fuel mix for 300miles before decreasing to 36:1.
I also rejetted carb to a #65. Maybe needs a #70 but not yet.
Haven't windowed poston yet. Not sure I want to. But I do have a reed valve for that if need be.
Very happy with this kit.

Jeff Smith
Stage 3

I have had this motor before..I did receive the entire order.Still building this bike..Im happy with everything so far

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