is the 2 stroke dead

Discussion in 'General Questions' started by pghewins, Aug 18, 2016.

  1. pghewins

    pghewins Member

    its a bit lighter slightly louder than the space shuttle requires fixing every 30 miles and way way slower than a gx 140 ,160 clone which is after initial cost way cheaper to run THOUGHTS
     

  2. jaguar

    jaguar Well-Known Member

    the tires and frame are already taxed to the limit with a 2 stroke engine. I can't imagine using an engine twice as heavy and bigger.
    With the necessary mods a 2 stroke is strong and reliable. I don't remember pushing mine home except for when I ran out of gas.
     
  3. pghewins

    pghewins Member

    my 66/80 cc i had some fun with and you really helped get it running as best it could with your advice which i followed you obviously really know what you on about but i got a clone 4 stroke engine gx200 weighs 8 lbs more ( aftere you have taken off the bits you dont need ) ive had bigger steaks lol its 6.5 out the box and the karting idiots can get 30-35 hp out of it it doesnt vibrate its quieter and i dont have to fix it every 4 yards its a lot more expensive to buy in first place but the savings on 2 stroke oil soon claw that back i use mine about 200 miles a week i commute on it
     
  4. jaguar

    jaguar Well-Known Member

    cool. If someone wants to copy you then where can they buy one ready to install?
     
  5. Frankenstein

    Frankenstein Active Member

    Lol
     
  6. jaguar

    jaguar Well-Known Member

    yeah I thought so
     
  7. butre

    butre Well-Known Member

    gx200s are a mile wide and don't fit in most frames, I can make more than 6 hp from a China girl, and my bike is perfectly reliable.

    the only advantage to a gx200 over a China girl with a competent owner is that you can make 15 horsepower without even trying, or 10 without even spending any money.
     
  8. Steve Best

    Steve Best Active Member

    I'm calling BS on a lot of the points here. I had my Grubee Skyhawk engine installed in the frame in a couple hours, including filing open the front mount for my mountain bike's massive front tube and no need to widen the pedals. The bare weight of the Grubee motor is less than 20 lbs (24 lbs for mounts, tank, chain, sprockets, controls and all) http://www.gasbike.net/products/grubee-skyhawk-gt2b-48cc-bike-motor-kit-black-finish#tabs-1 whereas the GX200 weighs 35 lbs without oil http://engines.honda.com/models/model-detail/gx200 . The mount plate and hardware (bits you really need) for the GX200 weigh more than 8 lbs! An entire 2 stroke bike can be built (40 lbs http://grubeeinc.com/Skyhawk Instructions.html ) for less weight than the GX200 engine and mounting kit.

    It is going to cost you a huge amount of money to get 30-35hp out of a 5.5hp(see http://engines.honda.com/models/model-detail/gx200 ) base engine. Cams, bigger valves and seats, valve springs, carb and custom exhaust all cost money. When I do the math it is not possible unless you take that 3600rpm GX200 motor and spin it 10,000rpm, and then where are reliability and vibration free? I can triple the 2hp the Grubee makes (exceed the stock GX200 hp!) for the cost of common tools, epoxy and gaskets. I come with some experience, but anyone that follows the "good" advice on this site can make 6hp by removing metal and filling other places in with epoxy, while running the stock pipe, carb, head and ignition. Put a good pipe ($100?) on a Grubee and you have double the hp of the GX200, for 1/2 the weight. Investment? Less than $300.

    "Fix it every 4 yards"? You clearly don't know what you are doing. I drive my Grubee 45 kms to work and back daily, and go out for 50-100 kms evening rides without worry. I've had 2 failures. A circlip failed from continuous 9000 rpm operation (my modifications and hard riding) and I just had a meltdown from overlean (again my fault). If I had driven this motor as supplied, neither of these would have happened. Each cost me $36 to repair. My motor had over 1000 miles on it at the time of the first failure and likely (no hour meter, just weekly calculation) over 2000 miles now. Still running.

    Cost of 2 stroke oil? Are you kidding me? I use very good synthetic at $20 bottle. I mix rich at 32:1 and drive full throttle most of the time getting 160+ kms out of the 3 L tank. 200 miles is 2 tanks of fuel. Cost of the fuel even up here where it is expensive is $6 and cost of oil is $3.75. Slow down, lean out and use a cheaper oil you will have that down to a buck a week in the US, and less than $4 in fuel. Cheap riding.

    The 2 stroke motors weigh much less, make ample hp in the legal 49cc requirement and have huge modification and hp gain potential over the 4 stroke engines, but I'll admit they are tricky. You have to know what you are doing. You are rewarded with a 40mph bike that you can throw over a fence. I will admit also that the 4 strokes, while being heavier, slower and more expensive, are more idiot proof. Perfectly suited to those that need that quality.

    Steve (you can see where my bias lays)
     
  9. FurryOnTheInside

    FurryOnTheInside Active Member

    I like that the two stroke engine is narrow enough to fit between the crank arms, and that you can lay the bike down (or throw it over a fence) and not worry about the dirty oil going where it shouldn't. No need to change the oil either and dispose of old oil.
    I like that I had to do some reading and learning and asking questions on the forum, and I am doing a lot of simple and straightforward "mods" to improve the engine and make it more individual and more my own. I learned about how the engine works as a (good) side effect of needing to do the mods.

    If I got a four stroke engine I would have had to leave it alone apart from all the oil changes. I would know muchhh less about it and how it works. It could just remain a big lump of metallic mystery and magic, like electronics still are to me! I would be more likely to have problems I dont know how to/ can't fix. And it would be the same engine as lots of other people have because it wouldn't have my mark on it.

    I'd rather have to fix something more often but _be able_ to, than have less things to fix but not be able to, and have a hard time pedalling home with it because of the weight.

    Four strokes have a lot more moving parts and yet the avaliable upgrades and spares seem to be a lot less. I think it would be a less interesting hobby with a four stroke.
     
  10. jaguar

    jaguar Well-Known Member

    the battle lines are drawn
     
    Frankfort MB's likes this.
  11. Frankenstein

    Frankenstein Active Member

    Lololololol.......
     
  12. Frankenstein

    Frankenstein Active Member

    Next up, Harley Davidson vs the mighty 2 smoke.

    In this competition we will be viewing the advantages of price, repair cost, fuel efficiency, cost of repairs, backyard modability, replaceability, and WhatTheHellAmIsupposedToDoWhenIbreakDownabilty. And of course, smiles to miles.

    May the best cycle win.
     
  13. Frankenstein

    Frankenstein Active Member

    Oh and searching the term "2 stroke bicycle motor" on eBay yields over 2000 results, meanwhile "4 stroke bicycle motor" only gives up 275 listings, safe to say that 2 strokes are far from falling into any endangered let alone extinct categories. And that is after 10 years at least of 2 stroke vs 4 stroke madness.
     
  14. Frankenstein

    Frankenstein Active Member

    Opinions lie, however, statistics cannot.
     
  15. jaguar

    jaguar Well-Known Member

    for best size, power, and ease of service the 2 stroke is the engine of choice for motorizing bicycles
     
  16. JunkyardDog

    JunkyardDog Active Member

    I love 2 strokes, and have a 150cc 2 stroke scooter and a 250cc 2 stroke dual sport bike. But the 2 stroke engines coming from China are very poor quality. I wish the Japanese would start making these engines. They would probably run forever. But since the only 2 stroke bicycle engines are from China, I am running a Honda GX35 4 stroke. It requires pedaling a couple of times to get started, but will reach speeds of 20 mph, which is the legal limit in my state, and certainly as fast as I would want to go on a pedal bicycle. We also have a 48cc limit on engine size, which was mostly based on the 48cc Chinese 2 stroke. I doubt any state allows an engine bigger than 49cc, so anything bigger is a moot point, for street use anyway.
     
  17. butre

    butre Well-Known Member

    my state has no displacement restrictions. you could have a caddy 500 in your bike and the cops won't bother you
     
  18. Frankfort MB's

    Frankfort MB's Well-Known Member

    New project?:D
     
    FurryOnTheInside likes this.
  19. Steve Best

    Steve Best Active Member

    How about a 315cc 6hp diesel bicycle?

    [​IMG]

    Note the funky front suspension!
    Steve
     
  20. FurryOnTheInside

    FurryOnTheInside Active Member

    Well, if you're going to start modifying the bicycle frame...

    Note the way it leaves the Ferrari for dust! ;)
     
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