Yùnicycle
Solo
November 2025 - Present
Overview
Built a fast, reliable mini bike from a used DB30 frame and a non-running Honda GX200 engine clone; documented on a BOM.
Conducted static and fluid FEA on components using ANSYS to ensure structural integrity and performance.
Performed metal fabrication including cutting and MIG welding; repaired and tuned engine; designed 3D-printed components.
Details & Skills
CAD [Fusion 360]
Finite Element Analysis FEA [ANSYS]
Before and during development: 3D modeled frame, forks and exhaust 1:1 to validate feasibility before cutting/welding and conduct FEA testing.
Conducted static structural FEA on frame model before metal fabrication to evaluate strain, deformation, and stress under rider weight and motor torque to predict structural behavior and integrity.
Before fabrication, performed fluid FEA to study how exhaust gases move through a custom exhaust system. Temperature, pressure, and flow patterns were assessed to ensure desired performance, durability, and acoustic behavior.
0-30 mph Calculations [MATLAB]
Script written and run in MATLAB to calculate theoretical time for Yunicycle to reach 30 mph from rest on asphalt.
Metal Fabrication & Mig Welding
Sanded, aligned, and welded steel extension tabs to back of frame to extend wheelbase.
Cut original cable brake mount off frame, then sanded, aligned, and welded the piece to the frame to mount hydraulic brake system
Sanded and welded 1' diameter black iron pipe together and to a flange to be used as an exhaust. Welded a threaded piece of pipe to the end to connect a slip on muffler.
Cut and sanded portions of the frame and front forks (shown in pink) to allow for better clearance, to fit the new motor, and to weld onto other parts of the frame.
Bill of Materials (BOM)
Small Engine Diagnostics, Repair, & Tuning
Fixed non-running Honda GX200 clone engine. Diagnosed, repaired, and tuned the motor to make it operate reliably and smooth. Added aftermarket intake and exhaust to improve performance, while also cleaning and painting to improve aesthetics.
Soldering
Soldered 2nd kill switch to go from ignition coil to switch to engine block. This allows for the ignition coil to short and shut off the motor without having to reach down for the switch on the engine block.
CAD & 3D Printing [Fusion 360 & Bambu]
3D modeled (Fusion 360) and 3D printed (Bambu X1 Carbon) a faux license plate and mount for rear of frame.
Left to right: 1. Plug for bottom of front forks; 2. mount for kill switch on left handle of front forks; 3. mount for gas tank of back of frame.
Stencils used for spray painted cosmetics.