50cc recordbikes

[SentraSE-R]

I owned a Honda 50 Cub that got 140+ mpg. Those were the days...

[janvos39]

I loved the overview of Frank on the 50 cc record bikes. Some of those riders are still active today in classic racing in The Netherlands and surroundings. Like De Vries,Toersen Van Dongen and occasionally also Van Kessel. Riding and racing with 50 cc bikes is still done a lot in Holland

[blueflame]

Here's one of my favourite clips from that era

http://www.youtube.com/watch?v=s4PA8VFpUlc

[Rayxoxo]

I bought and have a 49cc trike that has a real reverse not the reverse starter type, like those used in Harleys. And believe it or not it can wheely. You will notice a wheely bar on the back of it.

It claims to be able to go up to 56 MPH but the fastest that I have ever had it was a little above 40 mph but I let off of the throttle due to it becoming too radical because of the short width of the rear wheels (about 3 feet wide). I am fairly certain that it could probably do 56mph - but not with me driving it.

This trike doesn't have a clutch just brakes and gas. Really powerful for a 49cc.

Here is the pic of the trike with reverse and 3 speed - the red trike is also from Korea but I sold it about 5 years ago. It was an automatic tranny w/o reverse and a top speed of only 32 mph but only because of the governor on it.

btrike8.JPG

btrike11.JPG

l5s.JPG

l1s.JPG

3spdmanual2a.JPG

Had to pick them up in LA right off the boat. The rear fenders and back trunk are off the blue/silver one because I wanted to use it as my mini tractor.

I bought these trikes from Korea about 8 or so years ago and the brand name on it is MBA ??? Looks like a Honda motor but Honda's name isn't on it. It is chain drive.

It also has all the bells and whistles to make it legal to drive on the streets in Calif.

Sorry if I screwed up these attachments but there is a first time for everything. ; >)

[PeterS]

Something more .

Shell Eco-marathon - Global

[JasonG]

Shame nobody sells streamliners.

[PeterS]

Originally Posted by JasonG

Shame nobody sells streamliners.

They do ,stick a 50 cc KTM in this an see how you go .

| undercover cycling

[PeterS]

Actually it'd 147 mph .

'' The wind was calm and we hurried to make the return or record run. Starting from this
end of the course we got 3/4 of a mile more run up to the measured mile. At the outher end we
started from the 3/4 mile mark because of wet salt. That 3/4 of a mile makes a difference.
Return run 147.0 MPH, with a top speed of 150 exiting the mile. The average of the two runs
was good for 5 MPH over the worlds record.''
bub08

[darcane]

Originally Posted by dcb

year: 1956, a 13.5 hp engine drives this vehicle to 120mph


Let's say (complete swag) that it is using 1 GPH @ 120mph, that would translate into 120 MPG. Wouldn't it be cool if the beurocrats decided "what the hey, if you are getting 120mpg (without cheating using other energy sources), we don't care what you drive or how fast you drive it"?

There are more impressive things with that bike... in 1956 they set 38 different records, five of which still stand today, 55 years later! The records varied with engine sizes, the 500cc record that still stands is at 211mph.
BNI Certified LSR Records

Your estimate of 1GPH probably isn't too far off, probably closer to 1.5GPH and 80mpg.
Peak power is 13.5hp.
= 34,357.5 BTU/hr (1hp = 2545 BTU/hr)

Most engines are roughly 20% efficient at converting gas to forward motion, so divide by .2
=171,787.5 BTU/hr

Gas has 114,000 BTU/gal which puts us at 1.5GPH.

The big question is what did his engine run on... it ran in a "Fuel" class which means it ran on something other than gasoline (methanol, nitromethane, gasoline with N2O, etc)

[Grant-53]

With the right engine and body combination 500 mpg hiway is a realistic goal.