'2High'- The Motorized Tall Bike

Discussion in 'Photos & Bicycle Builds' started by lowracer, Feb 3, 2014.

  1. lowracer

    lowracer Member

    Hi folks,
    I built '2High' the Tall Bike after returning from Christmas break. I was away visiting family & had plenty of time to surf YouTube gathering ideas on how I was going to build mine. I'm not a welder as many of you know from my previous builds. I prefer nuts & bolts & drilling, cutting and recently grinding. As a child I wore out my erector set...lol
    At first, '2High' was pedal only. I wanted to make sure I liked riding it up so high and was comfortable getting up on it & down off it before adding the engine. BTW, riding up high is so much fun & people go crazy taking pictures, videos & shouting out words of encouragement as I ride on by.
    Its morphed a few times from MTB style handlebars to Roadie bars w/aero clip-ons, & now an 8" rise BMX bar. It also has gone from 8 speed to single speed with dual rear freewheels (one for engine, one for pedaling and totally independent of eachother (no drag).
    I added a Tanaka TC47 geared for max 27-29 mph. I'll be adding my large ATV fairing & Serfas Hugh Jass saddle.
    I ordered a 22T 'all threaded' freewheel today so I can flip the 2 rear freewheels around. This will better my engine powered chainline & allow me to run a larger pedaling chainring. I may even add one of the pocketbike expansion chambers I got laying around & wrap it with some header wrap.
    Cheers,
    -Lowracer-
     

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    Last edited: Feb 4, 2014

  2. keatonx

    keatonx Member

    Awesome bike, what's the stability like up there? How do you get up, just run, jump on and climb up?
     
  3. lowracer

    lowracer Member

    keatonx,
    The stability is surprisingly good. The best way to describe it is with two poles. One say, 3 feet long & the other 6 feet long. Balancing both on your hand, the longer pole is easier to keep upright. The longer the pole the more pendulum effect.
    The trick to getting on & getting off is simple. Left foot on left pedal while holding left side of handlebar, hop a bit forward with right foot, throw right leg up & over. Getting off is easier, just the same in reverse without the need to push or hop.
    I try to slow down before a red light and wait it out till green while slowly moving forward or make a right on red and do a quick u-turn back to the light to right on red again going the way I wanted to go...I can trackstand this bike easier than my normal bikes so that is also an option to avoid a dismount. I think 2High is the the best height as 3High would be more difficult to mount & dismount. This height seems perfect & very easy to get off & on. I did jump off twice now just to see what it would be like in case of an emergency & I didn't hurt myself.
    -Low-
     
  4. lowracer

    lowracer Member

    I went ahead & installed the header wrapped stock China girl poo-poo pipe replacing the stock catalyst muffler can on the Tanaka TC47. Wow, what a difference in noise levels! The stock can was loud as heck and blew exhaust onto my legs while ...gettin up on it, & gettin down...
    Now the exhaust exits down towards the ground and off of me.
    The pipe also wraps nicely around the fuel tank.
    See pic
    -Low-
     

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  5. lowracer

    lowracer Member

    This post has nothing to do with the Tall Bike but I wanted to see if you could find the subtle differences between my two road bikes? I ride them alternately depending on the type of ride (ex. group ride, solo, windy day, bridge climb). I've had these now since just before I built my 1st MB and definitely put more miles on these guys. I liked the GT Gutterball so much, I had to build two...lol
    -Low-
     

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  6. FurryOnTheInside

    FurryOnTheInside Active Member

    As with a unicycle. :)

    I wouldn't want to try to stop that from 27mph in an emergency such as when a deaf and blind pedestrian walks out onto the road, backwards, right in front of it. :helmet:

    In fact I'm amazed you ride that thing on the street, and with no helmet. :sweatdrop:
     
  7. FurryOnTheInside

    FurryOnTheInside Active Member

    Handlebar/aerobar/brake levers, rear blinkie, pump (turned the opposite way around), seat post (height adjustment), general cleanliness, effective chainstay length (indicating a difference in gearing of perhaps one tooth on the front or the rear sprocket, or a worn "stretched" chain). :detective: How did I do?
     
    Last edited: Feb 15, 2014
  8. lowracer

    lowracer Member

    Furry,
    You did real good!
    The rear bottle holder is different (one attaches to the seatpost, the other the seat rails)
    The front chainring is 53T on the time trial bar bike, 52T on the roady bar bike (with clip-on aerobars). Both have a 16T freewheel & the wheels are different between bikes.
    The only time I wear a helmet is on group road rides. I have seen much carnage riding with others in a paceline.
    I also wear a helmet everytime I go MTB'ing. Flying thru the woods at ludicrous speed definitely is high risk.
    My state doesn't have a helmet law.
    -Low-
     
    FurryOnTheInside likes this.
  9. wheelbender6

    wheelbender6 Well-Known Member

    Now I know how to enjoy two GT frames at the same time with only one set of wheels.
     
  10. lowracer

    lowracer Member

    Got a crazy idea today to swap wheels & install 12.5" scooter wheels on '2High' making it 'Not Too 2High'...lol
    I'll see if the large chainring on the lower bike has ground clearance once dropped onto the 12.5" wheelset?
    If it works, The pedal side of things can use the lower chainrings to ramp up gearing (52T:26T to 46T:16T freewheel) for around a max 20 mph pedaling speed. The engine can go straight to freewheel (10T:18T) for around 29mph.
    It wont be as tall, handling should be improved, without any pedal/engine interference...Hmmmmm.
    Wll post pics of the mock up once new 26" wheel arrives and I start unbolting things.
    -Low-
     
  11. butterbean

    butterbean Well-Known Member

    All I can say is, at least you don't have a front brake, so you won't flip over the bars. I can't really say anything else, because my momma told me not to.
     
  12. lowracer

    lowracer Member

    BB,
    In its current configuration, '2High' only as a front brake (no rear brake).
    My 2 road bikes (pedal only) both only have a front brake as well.
    I've never had a problem with over braking while sitting up (launch pad).
    Previously, I was a MTB racer where bike handling & braking skills were learned the hard way...lol
    -Low-
     
  13. butterbean

    butterbean Well-Known Member

    Well, my momma always told me if I didn't have anything nice to say, I shouldn't say anything. So I can't say anything else.
     
  14. lowracer

    lowracer Member

    Got my new rear wheel, its an Alex rim freewheel hub 26" black w/36 spokes and very nice for $35. I finished putting together the new drivetrain to better align the chainline and to swap the freewheels around to allow the pedal power side to be on the outside. Now I can run a 53T pedal chainring instead of a 20T. I put the smaller leather sprung saddle back on too. Chains line up perfectly now. I might finish building a DIY MiniVelo as seen in pics out of one of my kids bikes.
    Cheers,
    -Lowracer-
     

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    Last edited: Feb 23, 2014
  15. lowracer

    lowracer Member

    I ordered and installed a new fork to lower the front end a bit to put more weight on the front.
    Last week, off the line with strong pedallng & full throttle caused the bike to wheelie on me. I got it corrected before it got too out of control, but it was alarming. The previous Bloodline fork has a similar axle to crown length as a suspension fork and lifted the front end putting too much weight rearward. The new fork feels alot better, but no more full throttle under power pedalling takeoffs for me...lol
    I got a new Tanaka 40cc engine coming in the mail tomorrow and will either put it on '2High' or onto the full suspension scooter I pilaged the Tanaka 47cc & gearbox to build '2High'.
    Here are some pics w/the new fork.
    -Cheers-
    Lowracer
     

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  16. lowracer

    lowracer Member

    I added a nice stack of carbon headset spacers to replace the 'extra stem' I was using to take up 35mm's of space & also to allow fine tune adjustments to ride height. They were cheap so I had to get'em.
    -Low-
     

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  17. lowracer

    lowracer Member

    On the other forum, I was digging an electric bike made by Cannonball2 using an Xtracycle longtail cargo kit.
    It got my wheels turning & I started modifying '2High' into '2High2Long2Plush'.
    The tall bike is a hoot to ride both motorized and pedal powered. The wheelbase would benefit from being longer especially since the center of gravity is so high that it makes it very easy to wheelie, and I dont even want to think what would happen in an emergency braking situation...
    Pilaging parts from this free full suspension bike turned scooter, I will be using the rear swingarm/shock to extend & suspend '2High' and its cheapy front triple tree suspension fork (or my Marzocchi Bomber single crown fork gathering dust).
    I got most of the rear end complete, just gotta drill a few holes, bolts things up & extend the chains.
    Here's what I got so far.
    -Lowracer-
     

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  18. lowracer

    lowracer Member

    I got the rear end sorted out & almost complete, just one more hole to drill & bolt thru.
    I then installed a Marzocchi MTB single crown suspension fork I had in the closet that came off my MTB.
    With full suspension & the extended wheelbase, this will make a better Road Warrior.
    I also found nice 24" chain tubes at Home Depot for 98c/ea. I'm going to be using them for the chain to clear the right rear support strut & at the bottom bracket/rear dropout swingarm pivot point (removing the skateboard wheel as seen in the pics).
    I'll be able to run a perfectly straight shot with the tubes for less friction. Many tadpole trikes use chain tubes effectively for chain & grease management. Still need to hookup the chain for pedaling w/a rear derailleur tensioner, then another rear derailleur at the rear wheel of the bike.
    Looking forward to its 2nd maiden voyage since morphing.
    -Lowracer-
     

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  19. lowracer

    lowracer Member

    Not wanting to leave well enough alone, I have done a few things since the last pics.
    I added a front disc brake (Avid BB7 cable), routed the chains thru chain tubes (like recumbent trikes use), and swapped top frames. I may need to get a lock-out rear shock since in pedal only mode, it bounces down the road as the chain pulls the rear swingarm up. The engine drive doesn't have this problem as it pulls the swingarm forward. I may use the silver frame that was on top for its rear section and do away with rear suspension altogether. I like pedaling enough to sacrifice the suspension.
    Let me know if the bikes looks any better as it is now?
    Thanks,
    -Lowracer-
     

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  20. Aidan

    Aidan New Member

    I hope you have a good helmet and know how to fall! I'd hate to fall from that high at 30 mph, you're a brave man!

    Also, cool bike :)
     
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