Build your own moped. HandHelditems.com , 3-4HP EPA Certified Motorized Bicycle Engine 50cc Kit ,just pay $112.49 with Coupon Code: handheld10. ( Expire 12/31). Shipping starts at $16-$30. .

This kit comes with everything you'll need to convert bicycle into a motorized bike. You'll still be able to pedal the bike and ride like normal or start the engine by releasing the clutch lever. 25 to 35 mph depending on the gear ratio and weight. MPG 100-150 miles per gallon. Adds ~19lbs to bike.