X-PRO Zephyr Mini Dirt Bikes, Gas Powered 4 Stroke Engine Dirt Bikes! 40cc Pit Bikes with Chain Transmission Pull Starter, 10 Wheels! The 4-stroke engines have proven to be more reliable and durable than the 2-stroke engines.
Additionally with the 4-stroke you get. More torque: In general, 4 stroke engines always make extra torque than 2 stroke engine at low RPM. More fuel efficiency: 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes. EPA Approved: As power is generated once every 4 strokes & also as no oil or lubricant is added to the fuel; 4 stroke engine produces less pollution. More durability: We all know that more the engine runs, quicker it wears out.
2 stroke engines are designed for high RPM. If an engine can go for 10000 rpm's before it wears out; a 4 stroke engine with 100 rpm will run for 100 minutes than the other 2 stroke engine which has a higher rpm of 500 & will run for only 20 minutes.No extra addition of oil: Only the moving parts need lubrication intermediately. No extra oil or lubricant is added to fuel. Starter Bike: you're better off going too small rather than too big if safety is your biggest concern. Powerful 40cc motor puts out strong, predictable power! Single cylinder, 4-stroke, air cooling. 40cc engine powerful than regular 50cc engine. Front and Rear Disc brakes supply strong, reliable stopping power.
2.5-10 Front and Rear tires offer great traction. Note: Make sure that all mounting screws and bolts on this dirt bike are tightened before riding. Xinyue Brand, 40cc, 4-stroke, air cooling, single cylinder. Frame /Body/ Suspension / Brakes. Due to the fact these vehicles are factory-direct, there are also break-in procedures required to ensure the unit will work properly after assembly.1 If the damage is simply a few scratches or cracked plastic part(s), you can accept it and we'll send you replacement parts free of charge after we receive your complete supporting documents for the claim. Return will be only accepted in original package with non-assembly & non-used condition. This item is in the category "Sporting Goods\Outdoor Sports\Scooters\Gas Scooters". The seller is "motopartssuperstore" and is located in this country: US. This item can be shipped to United States.