Helio Motorized Bicycles has received numerous questions on the 2 stroke motor versus the 4 stroke. What motor should you choose for your Motor Bike? What are the differences in power, weight, dependability, etc?
First of all lets all be honest here; the 2 stroke is a better looking motor when you look at it. Mostly because it is smaller, lighter and adheres to the lines of the bike more thus, making it look more like a mini motorcycle. Most 2 stroke motors are trash but we found one we like after searching high and low.
Lets start with the 2 stroke. The main downfall of the 2 stroke is vibration and heat. The nature of the motor is very simple as there is no valves to let the gas in and exhaust out. These ports are built inside the motor casing so there is less moving parts but also less control. 2 stroke motors can produce a lot of power when tuned correctly but will require more mechanical assistance and you must mix oil in your gas. 2 stroke motors when tuned correctly will be faster and will have more power than their 4 stroke counterparts.
Moving onto the 4 stroke. We use Honda, and Heushang 4 stroke motors on all Helio bikes. The nature of the 4 stroke is more controlled as there are valves that control the inflow and outflow of the mixture/exhaust. The 4 stroke has more torque and is a lot more quiet. There is a oil reservoir so you do not have to add oil to your gas which means you can pull up to a gas station and pay the $2.00-3.00 USD to fill up ( good for about 75 miles). 4 strokes don’t heat up and you can pretty much ride them forever. The vibrations are less because the motor is more stable which makes for a more comfortable ride. Also we use an USA made gearbox built by EZM. The key component to this gearbox is the huge centrifugal(throttle and go) clutch that make your powertrain endure years of riding. The 4 stroke is just a more dependable setup hands down.
We at Helio have decided on 2 and 4 stroke bikes as we love them both for different reasons. The decision is yours but it really depends on what you want to use your bike for. If you love tinkering and tuning motors for performance than the 2 stroke is great for you. On the opposite side, if you want dependability and just want to ride then pick a 4 stroke model.