RUNFAST TM 2-STROKE 2-STROKE MOTORIZED BIKE SIGMA PRO-85 KIT

This kit converts bicycles into motorized bikes using a powerful 2-stroke engine with a heavy magnet rotor and durable construction.

• The description claims the kit uses a heavier magnet rotor for more power.
• The description claims thicker cylinder bodies and a heavy duty metal casing for strength and durability.
• The description claims wider front mounts and rugged 8mm mounting studs for better fitting.
• The description claims high quality U-bolt and 8mm bolts for secure mounting.