CT70 Factory Chain & Sprocket Reference
| Model | Front | Rear | Chain | Length |
|---|---|---|---|---|
| CT70 K0 (1969–1970) | 15T | 38T | 420 | 88 links |
| CT70H K0 / HK1 (4-speed) | 14T | 45T | 420 | 92 links |
| CT70 K1–1982 | 15T | 35T | 420 | 86 links |
Notes:
• All CT70 models above use 420-pitch chain.
• For every 1 inch of swingarm extension, add ≈ 4 extra links.
• Always fit and cut the chain to final length after installing engine and swingarm.
• For custom builds or extended swingarms, start with a longer chain (≈ 100 links) and size it precisely during install.
Shop CT70 Front and Rear Sprockets →
Shop CT70 Chains →
• All CT70 models above use 420-pitch chain.
• For every 1 inch of swingarm extension, add ≈ 4 extra links.
• Always fit and cut the chain to final length after installing engine and swingarm.
• For custom builds or extended swingarms, start with a longer chain (≈ 100 links) and size it precisely during install.
Shop CT70 Front and Rear Sprockets →
Shop CT70 Chains →
CT70 Sprocket Ratio Chart (Rear ÷ Front)
Highlight gearing for:
How to read: Ratio = Rear ÷ Front
Tall Ratio – Higher top speed, less torque
Ideal Range – Best all-around gearing for current engine
Short Ratio – More torque, lower top speed
K0 Stock (15/38)
HK0 / HK1 Stock (14/45)
K1–82 Stock (15/35)
⬅ Short (More Torque / Lower Speed)
|
Tall (Less Torque / Higher Speed) ➡
| Rear ↓ / Front → |
|---|