Unleash the Power of Your Vintage Honda: Stage 2 88cc Big Bore Kit
Double your stock horsepower and dominate the trails with this comprehensive Stage 2 88cc Big Bore Kit and 20mm Carburetor upgrade for your vintage Honda Z50, CT70, ATC70, TRX70, SL70, or XL70.
Pump Gas
High Compression
What’s in the Box
✓ 52mm High Compression Piston Kit
Includes rings, pin, and clips.
✓ Lightweight Aluminum Cylinder
Steel sleeve and oversized cooling fins.
✓ Head Gasket Kit
All necessary gaskets for installation.
✓ 20mm Performance Carburetor Assembly
Includes carb, intake, heatstop, gaskets, hardware, and air filter.
Why Riders Upgrade
🚀
Massive Power Increase
Instantly double your stock horsepower for thrilling acceleration and improved performance.
⚙️
Enhanced Cooling
The lightweight aluminum cylinder features oversized cooling fins for superior heat dissipation, ensuring reliable performance.
⛽
High-Compression Piston
A high-compression 52mm piston allows you to run pump gas while maximizing power output.
🔧
Complete Kit for Easy Install
Includes all necessary gaskets, hardware, and a performance 20mm carburetor assembly for a straightforward upgrade.
In Stock & Ready To Ship
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Packed with care before shipment
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Sent when shipped
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Although rare, some delays may occur. We’ll keep you updated every step of the way.
Z50/CT70 vs. Stock or Generic Options
STOCK HONDA 50/70
✗ Limited horsepower
✗ Slow acceleration
✗ Basic carburetor
✗ Basic cylinder design
✗ Prone to overheating
⚡ 50 CALIBER RACING 88CC KIT
✓ Doubled Horsepower
✓ Thrilling Acceleration
✓ Performance 20mm Carb
✓ High-Compression Piston
✓ Efficient Cooling System
Common Questions
What is this kit designed for?
This kit is specifically designed to upgrade the performance of vintage Honda Z50, CT70, ATC70, TRX70, SL70, and XL70 models.
Will I need special fuel for this kit?
No, the high-compression piston is designed to run efficiently on standard pump gasoline.
How much horsepower can I expect to gain?
This kit is designed to easily double the stock horsepower of your vintage Honda motorcycle.
What is included in the carburetor assembly?
The 20mm carburetor assembly includes the carburetor, intake manifold, heatstop, gaskets, mounting hardware, wrench, air filter, and throttle cable.
What Riders Are Saying
This kit totally transformed my old Z50! It has so much more power now, it feels like a new bike. Installation was straightforward. Highly recommend!
— Mike S., California
Amazing upgrade for my CT70. The added torque is incredible, making hills a breeze. The 20mm carb really wakes it up. Great value for the performance gain.
— Sarah K., Texas
Ready to Rev Up Your Vintage Ride?
Don't let your classic Honda sit with limited power. Upgrade today and experience the thrill of significantly increased performance!
Shop the Vintage Stage 2 88cc Big Bore Kit now!