Custom Two-Stroke Aluminum Frame Conversions
Built with Precision. Engineered for Performance. Guided End-to-End.
Modern Chassis. Legendary Two-Stroke Power.
Two Strokes Only specializes in custom aluminum frame conversions that integrate legendary two-stroke engines into modern chassis platforms. With OEM-level fitment, strength, and performance.
This is not a product you add to cart.
It’s a guided, consultative build process designed around your engine, your chassis, and your goals.
Why Most DIY Conversions Fail:
Two-stroke conversions are unforgiving. Poor engine placement, rushed fabrication, or guesswork measurements lead to:
- Fitment issues
- Vibration and alignment problems
- Compromised handling
- Long-term durability failures
Most shops rely on manual measurements and one-off solutions. That’s where things go wrong.
We eliminate uncertainty before metal is ever cut.
A Proven, Step-by-Step Conversion Process
Every build follows the same structured approach to ensure clarity, accuracy, and predictable outcomes.
1. Mandatory Consultation (First-Step)
Every project starts with a consultation. This allows us to:
- Confirm engine + chassis compatibility
- Understand your performance goals
- Determine scope, timeline, and complexity
- Identify whether a TSO kit or custom fabrication is required
2. Precision Engineering
We rely on advanced in-house engineering. Not on the customer.
- High-resolution scans capture every contour and critical dimension
- Single-digit micron accuracy
- Scan data is used to drive our CAD design
- Engine placement, clearances, and geometry are simulated digitally
3. Conversion Execution
Once engineering is finalized, we move into fabrication and assembly.
- If your engine/chassis combination matches one of our proven kits, we use high quality billet components for a clean, efficient conversion.
- For unique or one-off builds, our engineers will design and build a bespoke build to achieve OEM-level fitment and strength.
Proven at the Highest Level
The Two-Strokes Only team is responsible for many of the most well-known, record-breaking two-stroke builds featured on the Kaplan America YouTube Channel.
If you’ve seen:
- 70+ HP aluminum-frame conversions
- Dyno-verified performance builds
…you’ve seen our work.
We don’t promise results. We engineer them.
Tell us About Your Build
Whether you’re planning a full conversion, restoring a classic two-stroke, or need help choosing the right parts, it starts with a conversation.
Tell us about your bike, your goals, and where you’re at in the process. We’ll help you figure out the best next step.
What Happens After You Reach Out
We know this is a major project. We guide you through it.
When you submit an inquiry:
- We review your engine and chassis combination
- We confirm feasibility and fitment
- We walk you through options, timelines, and costs
- You receive clear next steps before any commitment
Ready to Start Your Build?
