Custom Two-Stroke Aluminum Frame Conversions
Built with Precision. Engineered for Performance. Guided End-to-End.
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 (No Guesswork)
We rely on advanced in-house engineering. Not on the customer.
Precision 3D Scanning
- High-resolution scans capture every contour and critical dimension
- Single-digit micron accuracy
- Creates a complete digital twin of your components
CAD-Driven Design
- Scan data is used to drive our CAD design
- Engine placement, clearances, and geometry are simulated digitally
- Fitment issues are solved virtually — before fabrication begins
Result: Perfect alignment, engine positioning, long-term reliability, and ability to provide spare parts.
3. Conversion Execution
Once engineering is finalized, we move into fabrication and assembly.
Two Paths to Conversion
TSO Conversion Kits
- If your engine/chassis combination matches one of our proven kits, we use high quality billet components for a clean, efficient conversion.
Full Custom Build Service
- 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.
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?
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.
