How fast will it go?

Discussion in 'General Questions' started by try1897, Jan 15, 2007.

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  1. try1897

    try1897 Guest

    I get asked that question more than any other except maybe How much did it cost. Well yesterday during my afternoon ride I got asked again and this time the guy doing the asking happened to be my neighbor who is a deputy sheriff. Thats our equiv- to a county cop. Anyway after a fairly long conversation about the bike and its legality he assured me that he wasn't going to bust me for anything, and in fact he wants to buy one himself, we desided to test it out. So we took his patrol car down to the nearest flat stretch of road and he clocked me at 34mmph on the hand held gun and 36mph on the in car equipt. I made two passes and the results were about the same. Now that was sitting upright and not laying down on the tank like I used to ride years ago so you could prob. squezze a few more mph out of it considering wind resistance etc. Also you gotta realize that I weigh 250lbs. so I'd say that 35 average is not to shabby. Now I reallllllly want the 36 tooth sprocket and have started droping change in an old jar to save up for it. ................. T inWV

  2. Tom

    Tom Active Member

    Aug 4, 2006
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    Wow. My top speed is ~27mph. I have a littly speedo thingy. Its funny thats what cops are doing in their spare time hahah.
  3. Butch

    Butch Guest

    I'd like to know how you guys get the high speed numbers. I weigh 160# and have a 70cc with a 36t rear sprocket and my max speed is still only 32 MPH.
  4. bamabikeguy

    bamabikeguy Active Member

    Sep 30, 2006
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    I have no idea how fast I was going coming down from the 4,000 feet altitude of the Oklahoma panhandle/High Chapperel, dropping into a series of 3 LOOOONG declines, but when it hit near bottom the engine "screamed" like I'M FREE. And I could feel a noticable difference.

    The funny thing is, on my 25 cc GEBE, my neighbor with digital dashboard has followed me over milelong straightaways many times, the avg. is 33, once hit 34, with the heavy Sun Cruiser frame.

    When we timed the 40 cc over 3 miles, he said "34" was the fastest it ever went.
  5. I weigh about 210lb and with 44T i can go about 25mph~30mph.
    I'm going to put 36T and see how fast it will pull me.
  6. I got the schwinn speedometer and the damn thing broke RIGHT AFTER I THREW AWAY THE BOX... so I don't know my top speed yet and I don't really think the digital speedos give you an accurate speed.
  7. psuggmog

    psuggmog Guest

    What part broke? maybe it's fixable.
  8. uncle_punk13

    uncle_punk13 Guest

    Different engines, different speeds, dependant upon my set-up.
    I weigh in at 125 and when I get into my 'speed tuck' i can squeze a couple of more outta the bike.
    On my 1905 Mead (2003 Whizzer, restrictors removed, 28" wheels)My top speed on the flat with no head wind was 43.5. Coming down out of the grand tetons, the support truck clocked me @55M.P.H.-
    But i had to slow it down as the front wheel was lifting and 'skating' the road surface. Those 1.5 tires didn't have a lot of surface area anyway, and if I went down at that speed, well, you know...
    it was sure fun as all git though!!!
    With this new one (Whizzer NE5) I'm hoping to break 60 M.P.H.
    I'm betting she can do it, it's been heavily (but conservatively) built up.
    We'll see how she does. I'll lose a bit through the suspended front forks and fatter tires, but I don't think it'll be enough to matter...
  9. uncle_punk13

    uncle_punk13 Guest

    Oh yeah, I forgot to reply about the plusses of having a cool cop for a neighbor!!!
    That rocks!
  10. etheric

    etheric Guest

    I weight appx 135 and was on a 70cc with the standard 44t on an old steel cruiser. The kit was broken in very liberally (ie: minimal patience)
    A fairly accurate/trustworthy Trek comp marked 29.8 top speed, flat, in crouch, no wind, mid-high 50s (F) (plus we are about 1000 feet above sea level)
    Okay, so all those factors probably don't contribute too much, but full throttle downhill, in a crouch pulled me up to just over 36mph.
    This is still running the break-in mixture (20:1?, I don't recall) and the throttle has got to be backed off a tad to reach warp speed; it bogs a bit wide open.
    I feel confident that a cruising speed of 30ish will be possible with a change of the mixture, new plug (hotter possibly?) and some other fine tuning.
  11. LabDude661

    LabDude661 New Member

    Aug 23, 2008
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    My 70 cc cruise real comfortable at 25. If I go a whole lot faster, the vibration kills me. I've hit 30 on the flat though.
  12. Maxx Ported

    Maxx Ported Member

    Aug 2, 2008
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    My Monteray(32T) will do 35, The Jaguar, (36T sprocket)I just finished is faster, (lighter)
    I think the way the engines are ported, tuned and increased Compression, make the most different in speeds.

    Attached Files:

  13. s_beaudry

    s_beaudry Member

    Aug 7, 2008
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    Whoa, that could of been the ultimate in entrapment ever done!

    "Come ride that MB and let me clock youwith my radar gun to see how fast you are going"
  14. JemmaUK

    JemmaUK Guest

    35mph with a #13 gear on the flat is the best I have managed.

    However considering thats from a piped 32cc engine its fairly impressive.

    The highest verifiable increase from a pipe I have seen is 40% more power than stock which means 1.6hp x 1.40 = 2.24hp. I dont think I am getting that much but there is a fair power hike..

    Oddly enough the pipe doesnt seem to have made a massive difference to fuel consumption.

    Jemma xx
  15. proline20

    proline20 New Member

    Aug 7, 2008
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    My unconventional homelite weedwacker friction drive runs 22.5 on the flat, 15-20 uphill, and 33.5 downhill sitting upright (handheld gps). I've now gone thru 2 bottom end cranks since changing the top to a 30cc. new numbers have been 27 flat, solid 20 uphill, and 35 downhill - fuel burn 168 mpg....
    I can't believe I just found out about motorized biking! Oh yeah, I've only got $25 invested and that was for 4 parts weedeaters to go with the one I started with. Last count, Frankenstein had 8 donors.
  16. kawasaki999

    kawasaki999 Member

    Jan 18, 2008
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    52.9 46cc gebe

    Attached Files:

  17. Member

    Sep 8, 2008
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    My 5-1/2 hp Jiang Dong on the Monarch with the 3-speed in 3rd runs 3100 on governor (cruise control) and goes 41 uphill,42 on flat, and 43 downhill and off a cliff. I am using approx. 2/3 of the engine. The "Happy Time"? runs about 35 but strangles wide open due to a restrictive fuel tap at this time. The 3hp Clinton in the Monarch an honest 40, but has seizures due to Clinton uses a round piston rather than cam ground and my rebore is a bit tight. The 20" Schwinn/Briggs & Stratton model N about 30. While I have the floor, AIG will write minimum liability for $43 for a whole year (in Oklahoma)
    Keith (trackfodder) Williams
    Last edited: Sep 9, 2008
  18. Warner

    Warner Member

    Jun 3, 2008
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  19. Mountainman

    Mountainman Active Member

    Jun 15, 2008
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    yes - ones are very interested in MBs and do ask those same questions

    wow - that is a mighty top speed you got going there

    and certified by the pooolice man ------- pretty cool

    Ride That Thing - Mountainman