Over 40mph Club

Discussion in 'Performance Mods' started by Rileymoto, Jul 11, 2009.


Over 40mph Club?

  1. Yes!!! I am in!

    52 vote(s)
  2. No... I can't get up to that speed

    16 vote(s)
  3. No I would poop myself at that speed

    5 vote(s)
  4. Motorbikes can get up to 40mph?

    6 vote(s)
  1. Rileymoto

    Rileymoto Member

    Are you in it?

    Tell me about your expirence!

    How was it?

    How did it happen?

    Is it an often occurance for you?

  2. Hawaii_Ed

    Hawaii_Ed Member

    My first build was a cheap beach, just to learn about the engines and setup. It was fine for putting around on the Air Force Base I lived on, and I rode it to work many months, putting almost 2000 miles on it. It topped in the low 30's. engine screaming.

    I met 5-7 Heaven, and his 'dragon lady.' We wanted to have some adventures on the Island, but my slow bike was holding us back. I had a very nice Trek 4300 pedal bike that I commuted with for years, and decided to go for a faster, lighter bike.

    I ordered a new 66cc slant head engine kit from zoombicycles, and a shift kit the same day.

    Bolted it together, and have been having a blast! The bike really just seemed to break in the motor riding with 5-7 last weekend. It started winding up like never before.

    With no wind, on the flats, I roll easy at 43-44MPH. It takes winding it out in each gear to get there. 35-37MPH is an easy pull. 45 is top of 6th gear, I still have two more to go. I hit 53 MPH on a downhill with 5-7 last weekend. I had some people express shock at my speeds, but remember we are at sea level in Hawaii. I also confirmed the bike speedo by GPS, they match exactly.

    The motor is all stock, just a NGK plug and a wire. I order an expansion pipe and air cleaner this week, I hope to pickup some torque with that to deal with the winds better. A stron headwind knocks be back to 32MPH.
  3. bamabikeguy

    bamabikeguy Active Member

    Jack put a 49cc Pocket Rocket engine on a GEBE belt set up, with 14 tooth gear, and his speedometer pegged him at 54 mph, later a State Trooper clocked him at 52.

    The engine auctioned for a little over $100, but the seller had to have $400 in the future sales.

    The bike is a California stretch cruiser, originally a 7 speed, but he coasterized it because of the Worksman hub he had on hand, with bearings double the size of standard bearings.

    When I rode it, I bumped 48 a couple of times, but coasted in at about 45.

    Attached Files:

  4. Hawaii_Ed

    Hawaii_Ed Member

    That is a cool bike bama!
  5. give me vtec

    give me vtec Active Member

    It was dark and I was leaving my neighborhood when my cousin pulled up next to me in his moms saab. I asked if he wanted to "race" so we took off. He stayed next to me while I got it up to speed and then he yelled out over my other cousin in the passenger seat...

    "your going 45!!!"

    I could have squeezed a little more out of it but due to the fact I had no brakes and I was coming up to a four way stop occupied by two big a** trucks I had to let off.

    I think I can do 50 in overdrive with pedaling.
  6. Rileymoto

    Rileymoto Member

    No brakes?

    You are a beast!

    I am affraid to even go close to that fast and i have two good brakes!
  7. strotter

    strotter Member

    Beach cruiser, 7 speed, titan motor, scooter guy mount.
    Tucked down, WOT driving throught a radar trap..........41mph.
  8. give me vtec

    give me vtec Active Member

    its the felt cruiser... rock solid at all speeds, brakes optional :helmet:
  9. 5-7HEAVEN

    5-7HEAVEN Guest

    I barely break 40mph on the flats with no wind.:jester:

    My twin Mitsubishis are SCREAMING at 10,100 rpm which is way past their redlines. That's with ADA S1 expansion chambers, 1.5" friction rollers and a very lean condition. Two Walbro WYK-58 carbs being installed, should raise hp/tq a smidge and go faster.:detective:

    :idea:What I REALLY need are larger-diameter friction spindles to LOWER engines' rpms to a more usable powerband.
    Last edited by a moderator: Jul 12, 2009
  10. 5-7HEAVEN

    5-7HEAVEN Guest

    What's your setup which pushes you so fast?
  11. Hawaii_Ed

    Hawaii_Ed Member

    VTEC has the Red Baron felft with a shift kit :)
  12. DetonatorTuning

    DetonatorTuning Active Member

    GP460, Dominator pipe, Trek 4500.

    GEBE 54.7mph all i could get out of the 19.9:1 ratio

    Staton 46mph all i could get out of the 18.75:1 ratio

    the scooterguy shifter 58mph slight tailwind

    jackshaft rackmount 55mph speed limited by 20.91:1 ratio and 15,000rpm operating ceiling.

  13. Alaskavan

    Alaskavan Guest

    My trike hits redline at about 55. Plenty of power, I've hit 53 while pulling a lightly loaded trailer. At 50+, with no suspension, I'm just surfing the high points of the road. I try to ride in the 30's.
  14. 5-7HEAVEN

    5-7HEAVEN Guest

    Travelling at 35-40mph is not something that I like to do, but it's my normal cruising speed out of necessity. Here in Hawaii, if there are cars around me, I MUST! travel at speed limit or slightly over for my own safety. I claim the entire lane so I HAVE to keep ahead of traffic.

    Sadly, cagers here treat bicyclists and slow mopeds with no respect. We are inhuman, an obstacle to their mission of getting to their destination in quick fashion. Drivers are so stressed out by congestion and traffic jams. People have filled their lives with so many activities that driving fast is the only way for them to complete as many tasks as possible.

    It seems like adult drivers are not enjoying their ride and are constantly in a hurried pace.

    How did it happen? The right combination of twin engine power and the largest friction rollers available.

    Is it an often occurrence for me? It is a daily occurrence. However, if there are no cars around me, I'll lower my speed until they catch up...sometimes.:whistling:
  15. lordoflightaz

    lordoflightaz Member

    My first attempt at over 40 mph was a failure. The chain sort of jumped off right at 39. New shorter chain, and I made it. Now I no longer care about going that fast.

    I am in no big hurry. That bike weighs more now so it is not going to hit 40 again.
  16. kerf

    kerf Guest

    My Staton chain drive with a GP460 and 18.75 / 1 gearing tops out at 43 on my GPS. That's with a secondary silencer, without it she'll wind up tighter. As with DT, the 460 will actually go faster with lower gearing allowing the engine to really spin up. I've actually been over 50 with lower gearing and no secondary silencer.
  17. ZnsaneRyder

    ZnsaneRyder Member


    You folks are FLYING!!! Now many of you are going 40 and even over 50! :tt1: :devilish:

    BTW, 55MPH max speed record 196cc 4-stroke engine on push-trailer for me. (beat old 52mph record of old trailer)

    45.3 MPH max speed bro's 79cc 4-stroke on push trailer. (IMO more impressive than mine, being less than half the cc's of my rig)

    Hands up for the 40MPH CLUB!!! w00t! :jester:

    Crazy Riding,
    ZnsaneRyder :jester:
    Last edited: Jul 12, 2009
  18. ZnsaneRyder

    ZnsaneRyder Member


    What engine do you have?
  19. 5-7HEAVEN

    5-7HEAVEN Guest

    On our ride home from Sandy Beach, Hawaii Ed and I were cruising right below 40mph for miles...in the curb lane following the "slow" drivers.

    The speed limit sign said 35mph, but the flow of traffic was much faster.
  20. Hawaii_Ed

    Hawaii_Ed Member

    I was showing 39-41 for miles on our ride today. 5-7 loaned me some gas at his house, we calculated 25:1, but my motor really liked whatever it was! Hit 49 MPH Coming into Waipahu, then had to slow down for traffic. I rolled at 47+ for most of Ft Weaver road into Ewa.