3 more significant differences : 1) the 49cc 4-stroke engine has a forced air cooling fan that is effective at all RPMs,the 2 stroke has no cooling system, it relies on moving the bike through the air 2) The 4-stroke has a proper lubricating system, the 2-stroke has a very poor lubricating system , so the 4-stroke should typically last much longer due to less wear 3) The gas mileage is much better with the 4-stroke. Period.
I have gone up to 37 mph on a huasheng 49cc 4 stroke. On the crappy centrifugal clutch that sucks and can leave stranded at any moment leaving u to pedal ur butt home. But with a better transmission like the ezqmatic you can get excellent reliability from the engine. 2 strokes are good you just have to carry around 2 mix oil around with the tank to mix it not a big deal but something you got to do.
@@Octanetroopers_01 One of us is messed up we both can't be right. I believe the two-stroke does all four cycles in the same order as the four stroke suck squeeze bang blow. It just accomplishes this in two strokes of the piston or one revolution of the crankshaft. And of course the four stroke does it in four strokes of the piston or two revolutions of the crankshaft.
2 stroke are faster cheaper and dirty, ride one in Cal you will get a ticket, 4 stroke last longer are cleaner, and you don't need to screw around mixing oil and gas want to go fast get a motorcycle
Great advice! There is an engine kit which fits for everyone, whether it's 2 stroke, 4 stroke, or electric. There are advantages and disadvantages each option, and should be taken into consideration when choosing an engine kit. All of our engines are intended for recreational use, and are not intended to be used on public highways or roads.
Less maintenance on the 4 and quieter too but like you said the 2 is way more enthusiast oriented and like my two rides my choice, but i would still like to build a 4 some time soon, nice vid thanks Guys!
2-Stroke - All the power is in the top end, use more fuel, noisy, have to remember to pre mix your fuel, less reliable and harder to start in the cold. 4-Stroke, More torque and bottom end power, quieter, more fuel efficient, only have to remember to keep engine oil topped up, much more reliable and the most important thing... they don't smell as nice as 2-stroke ;) I am by no means opposed to 2-stroke, I actually love the things! I really do think they are better suited to high performance motorbikes rather than tiny bicycle engines though, especially if you live in the UK and want to get away with riding them around illegally without getting caught by the old bill :) Plus, from the figures I have seen quoted the power difference between the same capacity 2-strokes and 4-strokes is negligible, they are very cheaply made an are not tuned. Only when you start to polish ports, tweak carbs, filters, and expansion chambers (in the 2-stroke case) will you start to notice differences. Maybe if Stan Stephens starts doing a bicycle engine tuning service/kit I will be interested in the 2-stroke option LOL
my yz 2 stroke hits 70 something, and those 4 strokes are fast too ..but it depends on the size of the motor, for the speed and power...not the strokes
I think that nobody realizes how simple a 2 stroke engine is, it has so few moving parts you can get out alot more power and better mpg, and if something breaks... you know what it is because its so SIMPLE and replace all parts within a few hours. Oil in gas? just 2%! and i have a lil Tomos 50cc, i can drive up to 50km with only 1 litre... no 4 stroke beats that XD
McMuffinFluffin yes, my friend and I assembled one of these kits on a bike and the exhaust pipe got in the way of the pedals when it was pointing down, so we switched it to were it was pointing and now we get a good wiff of fumes every time we ride it
Longest I've ever run my 2 stroke was about an hour. Sometimes full throttle sometimes half. but its usually a short commute to the store and back. No issues yet.
Yes and I'm really digging it... Don't know if you've ever tried one or not but they sound great but they're hard to line up on a lot of bye she want to make sure you got a lot of clearance between the front tire and the bottom tube
4 strokes are for the humble man who is just enjoying a slow peaceful ride and the 2 stroke is for the rowdy millennial who has to be faster and faster and put 400$ into a 100$ bike kit
THE 2 STROKE WILL NOT ACCELERATE FASTER WITH ANY REAL WEIGHT OR GOING UP HILL...4 STROKE WILL PROVIDE MORE TORQUE... ADJUST GEAR RATIO TO TRANSLATE THAT INTO FASTER FLAT LAND ACCELERATION THANKS 2 STROKE...
Now I know that my "1990 vintage Hyper motorized bicycle" is a 2-stroke one. I bought it just recently from a local pawnshop for $380.00, "as is." I had trouble turning on the engine, though, because I didn't exactly know how. I've watched another video on how to turn it on, including yours, today. Also, I didn't use a mixture of oil and gasoline on it...because I wasn't too sure about that. For a period of about 3 hours, I tried making it work. 👉 PROBLEM: They sold me the bicycle with a couple of wires loose. The one that connects to the "throttle" was disconnected. I connected one of the two wires to the blue wire that leads to the CDI box. Also, the white wire was disconnected, but I now know that it doesn't have to be connected to anything because it's optional and because it is sometimes used for connecting lights to the bicycle. 👉Another problem that I encountered was that both the gas line and the little gas filter started leaking. I need to replace those parts. 👉In the end, I decided to just come home peddling my vintage motorized bicycle, instead. Thanks for all your vital information... and for enlightening me. From, "Curious Joe" 😼👍
Your information on the strokes was correct, by the manual vs automatic was wayy off. It depends on the engine you use. Most motorcycle engines for example, two or four stroke, have clutches. The "recommended riding time" is a myth. It doesn't matter either way.
hi bike berry what's a high end level of theft prevention for these kits, I'm thinking of u locking my cylinder to the rack at my apartments as well as wheel to frame as well.
Peter Kapica He said "can have" these are one of only a few applications that have a manually operated clutch most 2 stroke engines use a centrifugal clutch.
Great video and great information. I just built a motorized bike with a two stroke engine. I kinda regretted why I didn't use a 4 stroke engine. After watching your video, I no longer regret LOL.
a 4 stroke ingin is composed of intake compression and power it takes a 4 stroke two revalutions of the ingin a two stroke combines exaust and power intake and compression so that it is only one revolution for each power stroke
I like 4 strokes, but the 4 stroke bike engines centrifugal clutch is it’s weakness. They burn out very quick and aren’t reliable. I prefer the more simple reliable 2 stroke clutch. Maybe make a 4 stroke with a 2 stroke clutch?
Have you ever had a lawsuit filed against you for unsafe manufacturing? Since the bicycle bearings (cheap walmart bikes) and the frame is not meant to withstand heavy loads and chinese engines are infamous with seizing how do you handle the complaints? Has any of your customers injured yet by a direct result of assembly / manufacturing?
wv9mm if it blows up for no reason he can claim. Lets say, perhaps a bearing on the bike burns up its on him to make sure his bike is in good working order before the engine gets installed
I have build a 2 stroke engine bicycle build four times but the 4 stroke is the best of reliability (Engine will always start), fuel efficiency is far better than the 2 stroke engine, quieter than the 2 stroke engine, little maintenance, gasoline burn cleaner than 2 stroke engine, very little to no vibrations, 4 stroke engine last longer than a 2 stroke engine. 2 stroke engine is noisy, it vibrate the bicycle and loosen the bolts & screws, it leaks oil, 2 stroke engine is a dirty engine cause you have to mix the oil with the gasoline together, doesn't completely burn all the fuel and sometimes it won't start. The only pros about 2 stroke engine is that the engine and parts are inexpensive, it can be easily modified or upgraded many ways (for faster speeds, aesthetics, etc., etc.) and it slightly has a bit more power than the 4 stroke engine (2 stroke engine - 66/80cc displacement, may get as little as 3 miles per hour to as high as 10 miles per hour faster than the 4 stroke engine (49cc displacement) even if both are using the same amount number of teeth on the sprocket.).
The other problem is you can buy a used motorcycle for $750-$800 on Craigslist. A year of motorcycle insurance is $60-$100 and a 250cc motorcycle gets about 75MPG. Plus, you can actually ride them legally on the road and they can keep up with traffic. Which makes the motorized bike more or less worthless. Now, an electric bike could be ridden on a bike trail and that's fun. But still the cost to build one is as much as buying a used motorcycle.
I've had both two strokes and four strokes the performance is about the same two strokes might have a little Edge. But because I like a reliable engine I have a 4-stroke.
I'd like to order from you , but to Romania , the cost of transport is 600 $ , too much :( Hope you guys will open a store in EU too ! If you do have a store , I'm waiting for your reply
I have a 65 years old moped with a JB 2-stroke engine, and this moped was used many hours a day every day in like 20 years, and it still works great... so why can your engine run only 30 mins?
wakka 2 strokes are cheaper 2 strokes accelerate faster 2 strokes have higher top speed 2 strokes = free vibrator 2 strokes run hotter and keep your legs warm 4 strokes cost more 4 strokes are pull start(meaning when the pull breaks off its toast) 4 strokes dont allow custom oil mixing 4 strokes arent noisy, competitive or get there faster DUH 2 strokes is the winner.
also 4 strokes don't _require_ oil mixing - you could still do it, and have a running engine - albeit one that fouls up and has a lifespan more similar to a 2 stroke. Leading to the advantage of longer engine life.
It's not 2 and 4 stroke per revolution. One revolution equals 2 stokes of the piston,. 1 stroke of the piston down, one up. Now the 2 stroke has power on every downward stroke (every second stroke) the 4 stroke has power every other downward stroke of the piston (i.e. every 4th stroke.
30 MINUTES ON A TWO STROKE ROFLI have gone on long roadtrips on a 40 year old two stroke, riding 6+ hours straight (stopping for gas periodically of course), and have never in 5 years had any problems with the engine except for rattling the carb loose once
PLEASE SOMEONE HELP. I recently put my motorized bike together. Without the spark plug in, the engine wants to turn over when I release the clutch. With the sparkplug, it does NOTHING. WHATS WRONG!
This is more of a comparison between two different models, not so much 4-stroke vs 2-stroke. The clutch has nothing to do with the engine. For example, our grass trimmer has a 4-stroke engine, and it uses a centrifugal clutch. It's also much more powerful than other 2-stroke trimmers I've used. It has a lot more low-end torque too. If I were choosing a yard tool, I'd pick a 4-stroke for sure.
One thing only briefly touched on (wording was something like "4 stroke engines are better for the environment") is that 2-stroke engines have exhaust that is a LOT dirtier than 4-stroke engine exhaust. So dirty that even a tiny 2-stroke engine spews way more incompletely-burned and unburned hydrocarbons than even the largest luxury SUV with an 8-cylinder engine. Once you bolt a gasoline engine onto a bicycle, you no longer have a bicycle -- you have a MOPED, a type of motor vehicle. Like all motor vehicles, it requires licensing to be legally operated on the public streets and roads. If you build a two-stroke moped, it will be so dirty that it fails basic EPA emissions standards and can't be licensed. If you ignore these rules, a cop might notice your lack of a license plate, stop you, and write a citation with a nice, big fine. This is why bikeberry.com has disclaimers about its 2-stroke kits only being suitable for racing use.
whats the small 2 inch metal cilinder piece thats where the engine is at, around it is the sprocket that you can move with the sp sprocket tool , i lost the piece one time i forgot to adjust the screws on my 2 stroke bicicle and while riding the aluminum box went off i managed to find 1 screw and the alunimum cover purchased the screws but realize that small pin was missing. need help ca t ride it i cant press the clutch to start the engine
Hey bikeberry, I want to take a motorized bike trip from Philadelphia to Atlantic city (About 70 miles). Which engine would be best suited for the task? (and less likely to kill me) I understand 2 strokes can have a lot of performance parts or heavy duty parts that could increase reliability but 4 strokes last longer. I'm currently running a 2 stroke. what are my options ?
get it right: a 4-stroke (4-cycle) engine has 2 strokes per revolution, not 4. intake and compression on the first revolution and power and exhaust on the second.
Where does the tank fuel line connect to the carb, no hoses were connected when I got the motor, there is one nipple bent downward and one straight coming from the carb and two more on the carb bowl.
Do you know what causes the 49 cc 4 stroke engine to be difficult to pull and start up? It takes multiple pulls and trying to soften the rope to start the engine
My 4 stroke vibrates like crazy and I'm not sure what's wrong, I have a 2 stroke build that i put together earlier and that one rides alot smoother but my 4 stroke build vibrates like crazy even at idle and I'm not sure why..
can the 48-50cc 4 strokes with 5/8" shaft accept a Comet-style torque converter and if so would it line up well with the rear wheel sprocket? - that setup would have advantages with hilly terrain.
False 4 strokes are faster stock 2 strokes are faster modified and company's push the 2 stroke due to the money made off all the parts to upgrade it .There is next to no parts to upgrade a 4 stroke right now. Get a 4 stroke no mixing and way more reliable.Mine goes 43 mph with a 50 tooth sprocket 3 speed hub.
I am really loving you guys videos!!!!! so informative...I am looking for something to get around the campground in the summer. I have very little money to work with, and a womans cruiser bike. I was looking at your friction motors, are you getting anymore in stock? I sure do hope so ;) I am also a heavy rider...not too many hills at camp. If you have suggestions that be awesome!! Also interested in financing, but I have no credit, ive never had a credit card.:D Thanks again! love you guys!
A friction drive engine seems like the perfect fit. It's reliable and has the torque if you happen to come across hills. We recently ordered a large shipment of engines and parts to fill our inventory. Just a little more patience and we'll have you riding throughout summer.
We are not saying a 4 stroke can not be customized. With a few adapters, most 2 stroke modifications can be installed onto a 4 stroke. We simply want to state that there are many more parts available that are intentionally made for 2 strokes than there are for 4 strokes, largely due to the popularity of 2 strokes in closed circuit racing. We, however, do agree that there are plenty of aftermarket parts available for 4 strokes.
Can either of these bicycles be pedaled independately while the motor is off? I used to have a scooter with a similar setup as the 4 stroke, and it seems like if you're pedaling and rev the engine, it'll engage the wheel and won't disengage unless you stop. The 2 stroke seems to be always engaged unless the clutch is pulled in
Bicycles with our engine kits can be pedaled independently by locking the clutch in its disengaged position. We provide a clutch lever with a locking pin as part of our engine kit package, or can be bought separately.
I sended a message to these guys never got a reply back. I guess they're not interested selling their products. Wanted to know what type of engine I'll need for schwin sidewinder 26' mountain bike. I saw a guy converted it, but changed the fuel intake with offset pipe to fit the engine. I asked him what engine he used didn't answer. So I sended information to these guys no reply...
Is it possible to remove the (what appears to be) plastic cover from a four stroke engine. If not, is it possible to paint it as long as I take care not to get paint on anything important. would it be possible to paint the entire engine so long as proper care it taken. I have an airbrush and am skilled in using it, so painting would not be the problem. Simply wondering if it would interfere with the operation of the motor.
and what will happen if i use more than 30 minutes the 2 stroke one will the motor explode ? because yesterday i had a ride of 3 hours and i didnt see any problem
BikeBerrycom Yeah, don't use the stock engine head for the 2 stroke. I upgraded mine. I drive it for many hours at a time hot and cold. I have almost 3,000 miles on my bike and it starts perfectly every time. As for the 4 stroke, it's based on a honda pump motor which is meant to handle heavy* loads for long time standing still!
