Gave up trying to go fast

Discussion in 'Motorized Bicycle General Discussion' started by SoThatICanRIdeWithTraffic, Mar 5, 2013.

  1. SoThatICanRIdeWithTraffic

    Joined:
    Feb 6, 2013
    Messages:
    54
    Likes Received:
    0
    I decided to write here about the things I learned from messing with my 66cc bike

    A lot of people who ride motorized bicycles want to go fast. And I'm not gonna lie I wanted to too. Really bad. I ended up doing all kinds of stuffs to my bike. It started out with SBP expansion chamber and a super small sprocket. Later it was 8 speed cassette and jackshaft. Then i got a new carb, airfilter and a new spark plug. So I've tried doing most of the kit stuff available.

    I ended up spending so much money because stupid bikeberry was advertising their motors to have 6 horse powers and capable of reaching 40mph and I wasn't happy with my bike when I learned that I couldn't ride on roads with other cars. This made me go crazy with upgrades.

    But I started getting rid of all of that stuff and started reverting back to stock. I first got rid of the jackshaft. Found out that once motorized bicycle starts shifting gears, its illegal where I live. The derailuers needed constant maintenance anyways so it wasn't even worth it.

    After looking more into regulations I learned that there's nothing preventing me from riding MABs on sidewalks in Phoenix area as long as the bike complies with the definition of motorized bicycle except in Tempe which has the city ordinance.

    So I swapped out my 27 tooth sprocket with 41. It was still going too fast but I learned to twist the throttle very slightly to go just a little bit faster than pedal bikes. So around 17 to 23 mph. It was still geting me to places faster than the bus since I could take direct routes and didn't have to wait for the bus.

    At a low speed like 20mph, even in Tempe cops didn't even bother to stop me because of the city ordinance as long as I was wearing a full face helmet and gloves. Even on sidewalks riding the wrong way I didn't get stopped as long as there were no bike lanes.


    After riding around like that for a while, I took off my 66cc and switched it with 49cc and it was so much quieter and had less vibrations.

    When I rode 40mph + on my 66cc with engine upgrade parts and 27 tooth sprocket, the bike just couldn't handle all that extra speed and vibration. Bikes aren't usually meant to handle that kind of speed. My hands were filthy with grease almost everyday because I constantly had to retighten everything after each rides.


    Now I don't have that problem anymore. 49cc with everything stock requires very little maintenance and never gets me into trouble with the law. I'm now very happy cruising around 23 mph on my motorized bicycle.


    I was about to spend several grands on a real heavy duty built MTB and a Morini, instead I discovered the joy of slow and easy riding. AND because I didn't bust my motorcycle savings on a ridiculously pricy custom motorized bicycle, I saved up enough for a KTM Superduke 990. Ill be going to a local KTM Dealer in about couple of weeks :D
     
    #1 SoThatICanRIdeWithTraffic, Mar 5, 2013
    Last edited: Mar 5, 2013
  2. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    Well written, with the voice of reason.

    You have realized the reason motorized bikes exist grasshoppa...to "get there" but only a little faster than a bicycle, and to have relaxing fun doing it.
     
  3. Mike B

    Mike B New Member

    Joined:
    Mar 23, 2011
    Messages:
    2,256
    Likes Received:
    1
    Yup, you are getting wise with experiance.

    My happy time cruises smooth under 25. 25 and over it shakes bad.
     
  4. Master-shake

    Master-shake New Member

    Joined:
    Feb 24, 2013
    Messages:
    315
    Likes Received:
    0
    yeah, I feel the same way sorta. I never really wanted to go fast to begin with anyway. just wanna not have to pedal against 20-30 mph winds. That and I needed a hobby. messing with bikes I've always liked so I suppose this is just a natural progression.
     
  5. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,301
    Likes Received:
    25
    It should be the first thing that anyone contemplating building a motorized bicycle understands. 'They're not motorcycles'. Unless you plan to race it, there really isn't any need for a bicycle to be pushed into the 40s or heaven forbid,the 50s. They're bicycles and most of them were never designed or built to be riden at those speeds.

    Yes, there are some heavy duty bikes out there built to take some abuse. Worksman comes to mind, but alas, all too often when a bike gets an engine attached to it, it's an inexpensive, department store bike meant for gentle pedaling under little stress.

    The safety factor alone should dictate that when you motorize a bike you should understand the limitations of the bike's construction and parts. Bearings, brakes and frame integrity of many bikes available today are not up to the standards required to safely attain the speeds that they are often asked to deliver.

    Getting the most in the way of performance is probably natural, human nature even, but one has to keep in mind that reaching unreasonable speeds on a bicycle has certain inherent limits when safety is concerned.

    There is also the skill level of the builder that must be brought into the equation. A builder with only rudimentary mechanical ability who either buys a running bike or manages to install a kit and get it running might not have the assessment skills to comprehend what is required to make the bike safe under the conditions imposed by an engine. Sort of like the old maxim, "an accident waiting to happen".

    Want to keep up with traffic? Do what the OP did and buy a motorcycle.

    No animals were harmed during the typing of this opinion :)

    Tom
     
    #5 2door, Mar 5, 2013
    Last edited: Mar 5, 2013
  6. bigbutterbean

    bigbutterbean New Member

    Joined:
    Jan 31, 2011
    Messages:
    2,417
    Likes Received:
    0
    I'm with all of you on this one. I'm in the process of building a completely custom Schwinn cruiser with a 98cc minibike engine, and I'm gearing it to redline at 32mph. There are some hills around where I live, so I'm much more interested in torque than speed. My ht engine never did climb hills too well, so that's what I'm going for with this custom build. I never was interested in going very fast. 20mph is fine for the city, 25-30mph outside the city. I see no need to go faster than that.
     
  7. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    Besides, it hurts more if you fall off at 40 compared to 20. :)
     
  8. Master-shake

    Master-shake New Member

    Joined:
    Feb 24, 2013
    Messages:
    315
    Likes Received:
    0
    Back in the day i used to cross country mountain bike and clipping one of those trees around a bend and then flying into another one of em at 15-25 hurts!
     
  9. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0


    They can, if you port it, trim gaskets, cut a notch in the piston skirt, use top quality motor oil, that'll get you up to 63km/h (39mph) on a good day, then I suppose a better carb and a expansion chamber may push you over 63kmh/h or 40+ mph.
    I have a Flying Horse from Zoombicycles, same as Bikeberry's I believe. I've reached 63km/h (39mph) on a 2.5Degree slope, but never 40, not yet.

    I've drempt of a shift kit, but then I thought I would spend more time maintaining it than using it, besides, I didn't like the idea of the front sprocket always spinning.

    Really, in the USA? We don't need to wear gloves here, helmet is mandatory.
    WHAT!?!?

    And during, don't leave home without tools!
     
    #9 Toadmund, Mar 5, 2013
    Last edited: Mar 5, 2013
  10. Kioshk

    Kioshk Active Member

    Joined:
    Oct 21, 2012
    Messages:
    1,153
    Likes Received:
    5
  11. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,301
    Likes Received:
    25
    Hey, that's just how things look when I ride my bikes; all black around the edges and a red circle in the center. Guess my bike is faster than I thought. Or maybe my goggles need cleaning. :)

    Tom
     
  12. Kioshk

    Kioshk Active Member

    Joined:
    Oct 21, 2012
    Messages:
    1,153
    Likes Received:
    5
    2door, you're close to 10,000 posts; d'ya attain universal-consciousness then?
     
  13. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    I surpassed that long ago. (universal consciousness) :)
     
  14. biknut

    biknut Active Member

    Joined:
    Sep 28, 2010
    Messages:
    6,365
    Likes Received:
    3
    What a refreshing post from all the "my motor bicycle is crap, I'm done with this" posts. I predict you're going to have a long successful run with china girls, because it sounds like you've learned their secret.

    You're now a good candidate for the 20 mph club.
     
  15. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,301
    Likes Received:
    25
    The kicker is that when you hit 10K, Paul demotes you back to being a Newbie and you gotta start all over again. 5 years down the drain. :)

    Tom
     
  16. Mike B

    Mike B New Member

    Joined:
    Mar 23, 2011
    Messages:
    2,256
    Likes Received:
    1
    The only gas motorbike that is designed to run at wide open throttle continuously is a Solex.

    And they go 20 max.

    Must be why I love it - :)
     
  17. runnermike

    runnermike New Member

    Joined:
    Nov 18, 2012
    Messages:
    936
    Likes Received:
    0
    I've enjoyed this thread so far. I've had 3 bikes. Each one got progressively faster. I just finished my fourth build...a custom GT2A frame with a Dave Rust Arrow Motorized Cycles race engine. It's fast!! I am starting my fifth this weekend. I'm resurrecting my Schwinn Del Mar. It's gonna be just an easy going cruiser, with some flare, of course...lol. While riding fast is fun at times, so is just cruising around. I ride my bikes back and forth to work because not only is it fun, but saves me a ton on gas versus cranking up my SUV!
     
  18. Fugi93

    Fugi93 New Member

    Joined:
    Dec 30, 2011
    Messages:
    144
    Likes Received:
    0
    I don't know. I would hate to be passed by some dude pedaling in spandex pants at wide open throttle.
     
  19. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    If it's all about speed and who's passing who, then you are on the wrong vehicle.
     
  20. Fugi93

    Fugi93 New Member

    Joined:
    Dec 30, 2011
    Messages:
    144
    Likes Received:
    0
    You tend to make a lot out of nothing.
     

Share This Page