4 or 2 stroke?

Discussion in 'Motorized Bicycle General Discussion' started by J0sh, Mar 31, 2015.

  1. J0sh

    J0sh New Member

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    I don't even know if theres a difference, but I was wondering if I should get a 2 or 4 stroke motor, I live on a extremely large hill, its pretty steep, and my whole town is hills, should I get a 4 stroke or would a 2 stroke be fine? I saw a 4 stroke kit for $224 on bikeberry.com
     
  2. mapbike

    mapbike Active Member

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    either one with a large rear sprocket so it can handle the hills will probably work for you, I like the 2 stroke kits myself but if you dont know the difference between the two you should honestly do some more research before making your decision.

    A 2 stroke needs oil mixed with the fuel and a 4 stroke engine has a gas tank for fuel only and th3 oil goes in the crankcase of the engine.

    4 stroke bike kit 3ngin3s are more reliable for the average person and 2 stroke moto4 kits provide more top speed and more overall power for those of us who like to tinker.

    hope 5his helps a little.
     
  3. J0sh

    J0sh New Member

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    I know my share but I was just making sure:) i also want to go for long rides so i might get a 4 stroke, do you think $224 is a good price? I could send the link if you'd like. But the problem is i don't know if bikeberry ships to CA, lets hope!
     
  4. Scooch

    Scooch New Member

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    Hey J0sh,

    $225 seems like a decent price for a basic 4 stroke kit. Can confirm that Bikeberry does ship to CA, just got a 2 stroke kit shipped here to Los Angeles a month or two ago. I had a lot of questions with my kit and they were awesome with helping on all the issues, would defniitely recommend buying from them.

    Cheers!
     
  5. J0sh

    J0sh New Member

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    Thanks! Have you gotten an m1 license and license plate? And if not, do you need one??
     
  6. Scooch

    Scooch New Member

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    Hey J0sh,

    I recently got my motorcycle permit, yet have not gone back to get my M1/M2 license. Unsure if I can use my motorized bicycle for the driving test as it doesn't really meet all the requirements that the DMV lists for a testing vehicle (not capable of highway riding, no insurance, etc.), but still looking into it.

    I have however, gotten a license plate. Was very easy, just filled out the form and sent it to the DMV with a $20 check (looks like the new price is $21, but they don't seem to be requesting the missing $1). Came about a week after I sent out the paperwork, currently have it zip tied to the chaingaurd. Hoping to bolt it to the back of my seat after making some adjustments.

    Cheers!

    *Edit* Just saw that you also asked if you needed a license / license plate. According to CA DMV law, yes you do. However, I have seen and talked with people who don't bother with either. It's a slight hassle going through these processes, but it's much cheaper that getting a ticket and/or getting your bike impounded if an officer who knows the DMV law stops you. Better safe than sorry!
     
    #6 Scooch, Apr 3, 2015
    Last edited: Apr 3, 2015
  7. KCvale

    KCvale Active Member

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    A direct drive 49cc 4-stroke is not going to get over hills unless you gear it so low that ~20 mph would be your top speed on flat ground.
    Like a 50T rear sprocket.

    Middle of the road 'junk' transfer case, but the HS 142F is a top notch engine.

    [​IMG]

    It's an HS 142F-engine the long shaft no clutch version.
    That present problems for putting a transfer case on it.

    The 5G un-adjustable dual chain transfer case is a mess.
    It works dandy (though noisy) for say a few hundred miles and the chains and sprockets wear in.

    After that no way to adjust it and 2 thin chains are not friendly to replace.

    It is another cheap engine shaft mount clutch bell & sprocket system like the stage III or7G, so not ideal.

    An original 4G or new 10G KCK will suite you better.
    The clutch bell and sprocket are on a seprate bearing suppoted shaft and driven with a T-belt you can adjust.

    I also think you are really better off with gearing.

    You'll still bog up hills ~18 in first but you won't have to pedal, and on flat ground you can cruise at ~30+.

    Not cheap, but if you want simple and reliable to get you around that's the ticket.
     
    #7 KCvale, Apr 3, 2015
    Last edited: Apr 3, 2015
  8. J0sh

    J0sh New Member

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    Would a 2 stroke do better going up hills? Ive just heard that 4 strokes are more reliable than 2 strokes and I don't know so much about motors. I just need something that can get up hills thats under $250 (kit itself not the bike included)
     
  9. J0sh

    J0sh New Member

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    Also, the hill isnt risiculously steep, just really really long. heres pictures from google earth lol. [​IMG]
    [​IMG]
     
  10. KCvale

    KCvale Active Member

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    Public transit or taxi passes come to mind.
    Seriously.

    Just save up $500+ or so if you really want to build something that can actually do what you need and not be a constant on-road repair pain that won't get you around reliably with ease.

    Hey just my advice, I help people choose the right machine for their needs and build it for a living and not bad at it.

    I suggest a 4-stroke shifter for you, maybe even a 7-speed rear for middle gear rages depending on hill slope.
     
  11. J0sh

    J0sh New Member

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    How much would that cost? I can do $500 since ill be saving so much on gas
     
  12. J0sh

    J0sh New Member

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    Would it be possible for you to link me to one of these kits?? I was looking at some but just want to know which one you'd suggest:)
     
  13. Motor awesomeness

    Motor awesomeness New Member

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    4 strokes have more torque. Do you know the percent grade? I Recommend a 4 stroke as they are easier to maintain, cleaner emissions. Just dosent have the power to weight ratio of a 2 stroke. For the gearing, I recommend a pretty low gear something like 15 or 16 to 1 ratio.
     
  14. KCvale

    KCvale Active Member

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    If you want something now I suggest go with a 4G.
    Bicycle Engines is the only place I know that still has real 4G kits.
    http://www.bicycle-engines.com/49cc-4G-T-Belt-Drive-Complete-Gas-Powered-Engine-Kit.html
    $300.

    If you want to jackshaft now the SickBikeParts 4-stroke shift kit is tops.
    http://www.sickbikeparts.com/catalog/product_info.php?cPath=21&products_id=110
    $190

    Note the kit picture is outdated, Jim has modified the base and the new kit base plays nice with the 142/4G combo.

    Figure ~$570 with shipping.

    If you are not in a hurry...
    I suggest you wait for the brand new system I designed and will be selling in a month or so.

    10G KCK long shaft with an HS 142 49cc or HS 144 54cc 4-stroke specially designed for right side output shifting builds.

    This is my prototype test of the idea over a year ago for basic function.

    [​IMG]

    Since then working with Don Grube the 4G was re-designed and the new 10G's are literally on a slow boat from China to the US.

    If you want to wait you can follow along with development here.
    http://kcsbikes.com/topic.asp?TOPIC_ID=694&whichpage=2

    It will be ~$100 less system with less moving parts to maintain.
     
  15. J0sh

    J0sh New Member

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    I decide to wait to start till 16 so i'm just going to wait for yours B)
     
  16. KCvale

    KCvale Active Member

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    You know how to find me when you are ready ;-}
     

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