2stroke or 4

Discussion in 'General Questions' started by nopedlenhere, Jan 18, 2008.

  1. nopedlenhere

    nopedlenhere Guest

    I have been looking at drive units for my bike..the china 2strokes look neet and with care should do a good job pulling me...But i never did like 2stroke motorcycles because of the viberation..maybe build dampers for it??? keeping undr 50ccs. how well do the 4s pull you around..I think both probley have good points but who has both..thanks for the input...bill:)

  2. 2 stokes make more power per oz. as to say but 4s are easyer to mantain(no gas mix), last longer, and can be operated over long periods of time without having to stop and cool off
  3. wavygravy

    wavygravy Guest

    hey bill go to bicycles motor parts & accessories. read the reviews on engines ect! pm me for my personal opinion! we do all new engine test here with augidog & the rest of the mb'c research lab! it all depends on preference & rideing style or what looks good on your machine. do ya want a show bike or a daily rider/comuter?
  4. Skyliner70cc

    Skyliner70cc Active Member

    The newer generation 2 strokes are so much smoother than the older ones. I used to be limited to 20 minutes of riding and my hands with go numb from the vibration and that's using thick foam grips on the handlebar. Now, i don't even notice the vibration in the grips anymore with the newer engines.
  5. Dadkins1

    Dadkins1 Member

    I agree w/ Skyliner - my 2 stroke is soo smooth I can ride for an hour covering 25 miles and still be fresh and not rattled.
  6. arceeguy

    arceeguy Active Member

    I do not notice any excessive vibration with the 2 stroke kits, unless you are revving the tar out of it. I can cruise at 20mph all day long, but usually my butt goes numb from the cheap seat before my hands ever get numb from vibration.
  7. duivendyk

    duivendyk Guest

    Vibration has nothing to do per se with the type of engine,and a lot to do with the balancing of moving engine parts.Overheating of engines also has nothing to do with the type of engines.But engines without forced air cooling regardless of type are obviously more prone to overheat at low speeds such as climbing hills..That the HT engines without cooling fans happen to be 2 strokes is incidental.Two strokes have higher specific output, (HP/liter),worse fuel economy and a louder more high pitched exhaust note.They are also a lot simpler,lacking valve gear and attendent problems.There are fewer things to go wrong.They put higher demands on the ignition system (twice as many plug firings) and are consequently more prone to misfire at high rpm.Having to mix oil is a bit of a nuisance,if you forget or let the engine run till it runs out of fuel you may be in for trouble due to lack of cylinder lubrication.(piston seizing)
    Last edited by a moderator: Oct 31, 2008
  8. ZnsaneRyder

    ZnsaneRyder Member

    2 strokes are loud and the exhaust smells.

    Also 4 strokes run better and stall less, and at least on long trips, you can just pull up to the gas pump without needing to mix anything, just fill and go.
  9. Mountainman

    Mountainman Active Member

    one thing for sure ---
    this question will be asked forever and answered different at times by the same person

    the two main differences are SOUND and the MIXING OF GAS

    I have owned a lot of both 2 and 4-strokes -- MBS, motor cycles, equip ect
    sound wise -- I will always perfer the 4-stroke
    4-strokes are not as loud -- seem to be easier on the operator and everyone else

    2-strokes --- have some great power when one revvs the heck out of them

    from your statement above I notice that you didn't like 2-stroke motorcycles
    neither did I
    one of the fastest motorcycles I ever owned was a Yamaha Bigbear
    what a fast, loud smokebomb that THING was
    I and that's just me -- find 2-strokes annoying as I

    ride that thing
  10. duivendyk

    duivendyk Guest

    Most motorcycle races have been won by 2 strokes,because of power /weight advantage.From a cost vs performance perspective 2 strokes win hands down.From an economy& pollution point of view 4 strokes have the edge.Honda has been working on resurrecting 2 strokes by improving, among other things the low speed low power combustion process,which is a large contributor to the high emisions and they appear to be succeeding,which is great news for 2 stroke diehards.For interesting info go to: www.motorcycle.com/manufacturer/honda/honda-exp2
  11. Accender

    Accender Member

    2smoke to win the track race.
    4 stroke to win the cross country.

  12. astring

    astring Member

    4 strokes are cleaner quieter and slower. No messing with mixing oil. Still though my Robin Subaru eho35 (4 stroke) has a lot of power. I suppose that if you had a Honda gx 50 it would be as powerful as almost any bike engine and it is a 4 stroke.
  13. Warner

    Warner Member

    I think you got this backwards. Two strokes DO make more power...that part is correct. But in my opinion they are much EASIER to maintain. Sure you have to mix oil in a gas can....big deal. You DON'T have to change or keep track of crankcase oil or adjust valves. They have FAR fewer moving parts (aka - less stuff to break) and have the same engine life ratings as the 4 strokes do.

    As far as operating wide open, they are MUCH better than 4 strokes in that respect....they are MEANT to be operated at full throttle for extended periods of time, versus the 4 strokes which are not. For me it was a no brainer. The ONLY plus that I could find with the 4 strokes is that they are marginally quieter, but the Mitsu 43TLE that I have is plenty quiet, especially with the 2nd muffler that I added on.

  14. HoughMade

    HoughMade Guest

    Apples and oranges in this thread.

    Cannot apply the same principles of a Tanaka or Mitsubishi type 2 stroke to a happy time. They are both 2 stroke, but there the similarity ends. Maintenance requirements, reliability and power are all quite different. Therefore, to compare 2 stroke to 4 stroke accurately, you have to compare specific engine to specific engine. More work, sure, but if you want accuracy....

    BTW- just because a 2 stroke has a power stroke on every revolution does not mean it will make twice the power of an equivalent 4 stroke- more power- yes, twice- no.
  15. Warner

    Warner Member

    I took it as a queston of 2 stroke vs 4 stroke, not specific 2 strokes against the best and most contemporary 4 strokes. Sorry if I misunderstood the original poster's question. I wouldn't consider the Chinese engines in any case, personally.....

  16. HoughMade

    HoughMade Guest

    Wasn't talking about your post in particular- but several....and neither would I
    Last edited by a moderator: Nov 4, 2008
  17. Dadkins1

    Dadkins1 Member

    I don't have a huge preference. I Like the power and weight savings of the 2 stroke - and the smell - I know it's weird. But I kinda like the smell of two stroke exhaust - throw in a little castor oil or Klotz and it's even better - reminds me of watching TT races as a kid or snowmobile races too. On the other hand 4 stroke power is nice and clean and quiet.
  18. Happy Valley

    Happy Valley Active Member

  19. SirJakesus

    SirJakesus Guest

    I personally like the 2 stroke for MB uses. They're a cinch to maintain as you only have to clean the air filter every gallon of gas or so and thats about it for me. Theres enough other stuff on an MB to have to inspect pre-ride that I really don't want to worry about the engine itself. The TLE43 is plenty quiet until you start revving her out and the weight savings and size is far superior to the 4 strokes. The TLE43 has 2.2hp, the Honda =50 has 2.5. It's a no brainer to me. Sure it would be great to fill up directly into my gas tank at fuel stations just so people could see my pittance gas expense but whatever, its worth it for me to go 2 stroke. I don't care what anybody says about the air pollution they cause either, I refrain from buying all kinds of ridiculous consumer garbage unless I really need it so my environmental footprint is already rather low for an American.
    Theres a reason all the original old-style mopeds had 2-stroke engines. The same reasons MB's should have them.
    However I must say if I was to make a hybrid gas/electric bike I would probably use a 4 stroke because the electric motor would compensate for the 3/4 or so HP loss.
    Speaking of which, has anybody seen the OHM bikes that use the BionX system? I would love to mount a friction drive and full integrated lighting system to one of those... so expensive though. I'll probably do it eventually lacking any form of a "life" as others call it. :)
  20. Mountainman

    Mountainman Active Member

    HTs may = nothing but HEARTACHE

    although many seem to be very happy with their HTs

    I sure DO AGREE with Warner on this one

    I have been on this site for a few months now
    and have seen so many UNhappy ones regarding their Chinese engines

    it hurts to see ones such as me
    that after many years away from riding the fun 2 wheels with engines
    get back into it starting with an engine that may bring

    I am very grateful that I bought the Robin because all I wish to do is

    ride that thing