Looking to get more horsepower, torque and throttle response from your Harley-Davidson Milwaukee-Eight? Taverner Motorsports supplies and installs Alpha Performance Engines A.P.E. performance packages for Harley M8 riders across Brisbane, South East Queensland and Australia.

A.P.E. has become one of Australia’s leading names in Harley-Davidson M8 performance, offering proven cam kits, 124ci, 128ci and selected 131ci big bore packages designed for serious real-world results. Whether you want a sharper daily rider, huge touring torque, a 150+ horsepower street package or a maximum naturally aspirated performance build, Taverner Motorsports can help you choose the right A.P.E. upgrade for your Harley.
Custom black motorcycle with gold accents parked inside a wooden-paneled showroom with MUTT Motorcycles logo.
Custom black and red motorcycle with high handlebars parked on concrete with buildings in background.

Why Choose A.P.E. for Harley M8 Performance?

The Milwaukee-Eight is a strong engine platform, but factory Harleys are designed to meet broad emissions, noise and rideability requirements. A properly selected A.P.E. package unlocks the performance that sits beneath the surface.

Unlike generic bolt-on upgrades, Alpha Performance Engines packages are designed as matched combinations. Camshaft choice, cylinder capacity, compression, fuel delivery, valve train components, intake flow and supporting hardware are selected to work together. That means your Harley does not just make more power; it feels better everywhere you ride.

  • Stronger low-end and mid-range torque.
  • Sharper throttle response.
  • More horsepower across the rev range.
  • Better highway overtaking.
  • Improved touring performance.
  • A stronger, more aggressive Harley feel.
  • Better results when combined with exhaust, intake and dyno tuning.
Black and red Harley-Davidson motorcycle with chrome exhaust pipes in a showroom with another red bike in background.

Choose the Right A.P.E. Package

Every Harley rider wants something different. Some want the best-value first upgrade. Some want huge low-end torque. Others want a serious 128ci build capable of big horsepower.
A.P.E. Package Best For Main Benefit
Power Plus Cam Kit First performance upgrade Throttle response and torque
Stump Puller Touring and heavy bikes Huge low-end torque
Street Performer All-round street performance Smooth 150+ hp/tq potential
Sneaky Pete Serious street riders 155+ hp/tq potential
Silverback Maximum N/A performance 160+ hp potential

The Power Plus Cam Kit is the best entry point for riders wanting a noticeable performance upgrade without moving straight into a big bore package. With cam options including 480, 483, 484, 485 and selected newer profiles, the Power Plus package improves throttle response, mid-range torque and overall rideability. It is best for riders wanting a Stage 2-style performance upgrade, sharper acceleration and a stronger Harley feel.

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A.P.E. Power Plus Cam Kit

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The Stump Puller is A.P.E.’s torque-focused big bore package. It is designed for riders who want huge low and mid-range pulling power, making it ideal for Touring models, heavy bikes, two-up riding and riders who want effortless overtaking.

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A.P.E. Stump Puller

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The Street Performer package is the all-rounder. It is designed for smooth, broad power delivery, strong low-end torque and 150+ horsepower and torque potential when supported by the right parts and tuning.

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A.P.E. Street Performer

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Sneaky Pete is a stronger performance package for riders chasing serious street power. It is designed to produce north of 155 horsepower and torque with the right air cleaner, exhaust and tuning combination.

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A.P.E. Sneaky Pete

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Silverback is the flagship naturally aspirated A.P.E. package. It is designed for riders chasing 160+ horsepower potential, top-end rush and maximum naturally aspirated performance.

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A.P.E. Silverback

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Performance Gains: Dyno Results & Real-World Benefits

Horsepower & Torque:

Horsepower & Torque: The APE Sneaky Pete delivers 150 hp+, while the Silverback pushes 160+ hp. Expect substantial torque gains for stronger launches and effortless overtaking.

Smoother Acceleration:

Enhanced throttle response and a power delivery that makes every ride more enjoyable, whether in the city or on the open highway.

Reliability:

All kits are engineered for everyday usability, balancing high performance with long-term durability and minimal maintenance.

Dyno-Tuned Results:

Benefit from precision tuning for optimum results, ensuring your engine performs at its peak.

Close-up of a black textured surface with metallic APE logo and a round metal bolt.

Installation & Dyno Tuning Services

At Taverner Motorsports, our Brisbane workshop offers full installation and dyno tuning for all Alpha Performance Engines Big Bore Kits. Here’s how the process works:

  • Select Your Kit: Choose between the Stump Puller, Sneaky Pete, or Silverback—depending on your riding goals and bike model.
  • Order & Booking: Order online or contact our team to book your installation. We offer flexible scheduling for Brisbane locals and can arrange shipping Australia-wide.
  • Professional Installation: Our experienced technicians handle everything from disassembly to fitting new cylinders, pistons, and cams. We maintain stock heads for simplicity, with optional ported upgrades for more airflow and power.
  • Ride-In/Ride-Out Service: With our Sneaky Pete package, enjoy a seamless experience—drop off your bike, and pick it up fully upgraded!
  • Dyno Tuning: Every installation includes comprehensive dyno tuning to extract maximum performance and ensure reliability.
  • Unlock Your Bike: After installation, you’ll notice smoother acceleration, improved throttle response, and the kind of power that adds serious grin factor to every ride.

Australia-Wide Service: Shipping & Local Expertise

Based in Brisbane, Queensland, Taverner Motorsports supplies and installs APE Big Bore Kits across Greater Brisbane and offers Australia-wide shipping and support. Whether you’re in Sydney, Melbourne, Adelaide, Perth, or anywhere in between, we deliver parts and expertise right to your door. Our team is always available for advice, guidance, and after-sales service—making us the trusted choice for motorcycle engine upgrades Australia-wide.

Contact & Next Steps

Ready to unlock your Harley’s true potential with an Alpha Performance Engines Big Bore Kit?

Order online, visit our Brisbane workshop, or contact our team for expert advice, quotes, and bookings. Whether you’re after dyno tuning in Brisbane or reliable motorcycle engine upgrades anywhere in Australia, Taverner Motorsports is here to help.

  • Order Online: Browse our full range and place your order with Australia-wide shipping.
  • Visit Brisbane Workshop: Experience our ride-in/ride-out installation and dyno tuning services.
  • Get a Quote: Contact us today to discuss your bike, riding style, and power goals.
  • Follow Us: Stay up to date with the latest Harley-Davidson M8 upgrades and performance tips on our social media channels.

Experience the difference with Alpha Performance Engines Big Bore Kits—engineered for serious Harley-Davidson M8 performance, supported by Brisbane’s leading workshop, and shipped anywhere across Australia. Your ride, your power, your way.

Order online or visit our Brisbane workshop. We offer full installation and dyno tuning for optimum results—especially with Sneaky Pete ride-in/ride-out service.

Horsepower & Torque:

After installation, enjoy smoother acceleration, improved throttle response, and the kind of power that adds grin factor to every ride.

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PARTS & ACCESSORIES

Our warehouse stocks over 11,000 parts from many different suppliers for a range of classic motorcycles, particularly for Harley Davidson and British motorbikes. Our parts department is on hand with great expertise to help you find just the right part for your ride.

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Testimonials

Gave me a great deal on some nice grips and installed them for me, great customer service. will definitely be visiting whenever i need service for my harley

James Southam

QLD

I purchased my Talaria Sting electric bike from Brian. The team at Taverner Motorsports where helpful and ensured that my bike was ready for pick up. I would highly recommend!

Banos Porter

QLD

Great guys, honest, knowledgeable and do great work at more than reasonable rates. Thanks for the work on my CX

Damian Joyce

QLD

I visited the place when I was in Briabane and I was very well taken care of! I recommend!

Fabiano Sena

QLD

Could not recommend highly enough. Took on my 18 year old Buell. Expert mechanics with great attention to detail and the comms from Brian was second to none.

Leigh A

QLD

Couldn’t have been happier with the work i recently had done to my 2017 breakout . Expert advice and experts on the tools quick turnaround on Christmas week ! Thanks so much Joe and Cat 👍

feidhlim corr

QLD

I had an absolutely excellent experience, my bike came back in better condition than i dropped it off to them.. extremely happy with the customer service and workmanship.

Danny Meredith

QLD

Great people. Diverse bikes in the shop. You can tell they are not snobs and just real motorcycle people

Carlo A

QLD

I recently had my Harley Davidson Sportster serviced and was thoroughly impressed with the work performed by the them.

I am extremely satisfied and highly recommend their services to anyone seeking top-notch maintenance.

Abhi Singh

QLD

Definitely recommended easy to deal with Clear, responsive and understanding Of what I wanted and was stoked with the outcome Honestly, Joe and cat thanks heaps again

SKYHAWK SANDO

QLD

Awesome people who are extremely knowledgeable and experienced and very fair pricing.
Had my 883 serviced once before somewhere else, however after the Taverner service I realised how it was meant to run!

Magdalena

QLD

FAQ’s

What is Alpha Performance Engines A.P.E.?

Which A.P.E. package is best for my Harley M8?

Can I upgrade a 107ci Harley M8 to 124ci?

Can I upgrade a 114ci or 117ci Harley M8 to 128ci?

Do A.P.E. packages need dyno tuning?

Which A.P.E. package makes the most horsepower?

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