Honda Z50 / CT70 / ATC70 Stage 2 88cc Big Bore Kit
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.
What’s in the Box (Based on selected options)
Why Riders Upgrade
Honda Z50/CT70 vs. Stock or Generic Options
✗ Slow acceleration
✗ Basic carburetor
✗ Basic cylinder design
✗ Prone to overheating
✓ 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!
Vehicle Fitment
Honda ATC110 — 1968-1981Honda ATC125M — 1968-1981
Honda ATC70 — 1968-1981
Honda ATC90 — 1968-1981
Honda CT70 — 1968-1981
Honda SL100 — 1968-1981
Honda SL125 — 1968-1981
Honda SL70 — 1968-1981
Honda SL70 — 1970-1973
Honda SL90 — 1968-1981
Honda TRX70 — 1968-1981
Honda XL100 — 1968-1981
Honda XL125 — 1968-1981
Honda XL70 — 1968-1981
Honda XL70 — 1971-1976
Honda XL80 — 1968-1981
Honda Z50 — 1968-1981
Shipping & Returns
Shipping details are shown at checkout. Review our shipping and return policies for complete information.
Honda Z50 / CT70 / ATC70 Stage 2 88cc Big Bore Kit
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Description
Description
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.
What’s in the Box (Based on selected options)
Why Riders Upgrade
Honda Z50/CT70 vs. Stock or Generic Options
✗ Slow acceleration
✗ Basic carburetor
✗ Basic cylinder design
✗ Prone to overheating
✓ 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!
Vehicle Fitment
Honda ATC110 — 1968-1981Honda ATC125M — 1968-1981
Honda ATC70 — 1968-1981
Honda ATC90 — 1968-1981
Honda CT70 — 1968-1981
Honda SL100 — 1968-1981
Honda SL125 — 1968-1981
Honda SL70 — 1968-1981
Honda SL70 — 1970-1973
Honda SL90 — 1968-1981
Honda TRX70 — 1968-1981
Honda XL100 — 1968-1981
Honda XL125 — 1968-1981
Honda XL70 — 1968-1981
Honda XL70 — 1971-1976
Honda XL80 — 1968-1981
Honda Z50 — 1968-1981
Reviews
Reviews
Payment & Security
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R1 Industries can help confirm product fitment, compare options and arrange professional installation or repair.