Description
HONDA NAVI 125CC BIG BORE PISTON & ALLOY CYLINDER KIT
Purpose-designed for the Honda Navi
Transform your stock Navi with the Wild Boar Racing 53mm Big Bore Piston & Alloy Cylinder Kit.
WHY 125CC?
This displacement provides greater performance and creates a strong foundation for any further modifications.
EXPECTED BENEFITS OF THE BIG-BORE CONFIGURATION
- Increased engine displacement
- Increased torque
- Stronger acceleration
- Improved throttle response
- Greater scope for further performance modifications
Expected performance will depend on the overall engine configuration, including fueling,air, exhaust.
DEVELOPED FOR THE HONDA NAVI
The development process done here in Australia included installation and evaluation processes before the kit was released for the aftermarket.
The Wild Boar 125cc high performance racing kit was developed specifically for Honda Navi enthusiasts looking for a purpose-designed high performance big bore piston and alloy-cylinder upgrade.
Rather than focusing solely on displacement, Wild Boar considered the complete piston-and-cylinder package while keeping to the original navi stroke:
The Wild Boar objective was straightforward:
DESIGN THE PISTON.
DESIGN THE CYLINDER.
BUILD THE COMPLETE PACKAGE AROUND THE HONDA NAVI.
Basic Fitment Instructions Provided
This is a performance engine component. Mechanical knowledge is required for installation.
Ring installation, gasket installation, valve clearance and engine assembly procedures are essential.
If you are unsure about installation, have the work completed or checked by a qualified motorcycle mechanic.
→ Looking to have your 125cc kit fitted professionally ? Contact us if you are wanting this install service.
Fitment service is recommended by APB Auto & work is provided by a third party scooter specialist in Caboolture –
Fitment cost $220 including GST. Drop off and collect your bike. This price and offer is strictly to install the Wild Boar 125cc kit for the Honda Navi only !
To get the highest performance for your Wild Boar 125cc kit we recommend using a Pilot Jet #38 / Main Jet #95 – #98 to fit the stock carburetor. This jetting will provide excellent fuel intake for the Wild Boar 125cc Kit.
We also highly recommend the K&N air filter for a few reasons.
- The K&N air filter does an excellent job of providing the required increased air intake giving greater enhanced performance & protection while keeping the Navi air filter system in original form.
- The only further mods we recommend with the engine and transmission are upgrades to a racing clutch and racing variator for the ultimate Navi build.
- We believe the recommended build above will give you the optimum racing performance, reliability and overall longevity for your Navi while keeping it easy to service and maintain.
READY TO UPGRADE YOUR HONDA NAVI?
RELEASE THE BOAR.
TRANSFORM YOUR NAVI.
WILD BOAR RACING — PURPOSE BUILT FOR PERFORMANCE.
LINK- Honda Navi Work Shop Manual






























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