RUNFAST TM 2-STROKE 2-STROKE MOTORIZED BIKE SIGMA PRO-85 ENGINE ONLY

This kit converts bicycles into motorized bikes using a powerful motor with a heavy rotor and durable construction.

• The description claims the kit uses a heavier, stronger magnet rotor for more power.
• The description claims the kit has a heavy duty metal engine casing for added strength and durability.
• The description claims the kit uses rugged, thick 8mm mounting studs compared to cheaper alternatives.
• The description claims the kit features high quality advanced U-bolt and 8mm bolts for superior grip.