A full blown motorcycle from a bike

[bando_red]

Has anyone here ever attempted or seen something like it? Not some 600cc beast but just something that goes up to 60-70 mph and qualifies as a motorcycle rather than a moped, maybe a 7 or 8 hp. I don't know a great deal about motorcycles so I'm sure if there is some obvious reason for this or not. I've seen a few youtube vids or 196cc engines on schwinns that can get up to about 55-60, thats practically a motorcycle right?

 

[motorpsycho]

ummm yeah but that would be crazy. A bike frame without modifications couldn't handle the vibrations from those kinds of speeds.
not only that, the bearings would be a major issue because standard bike bearings probably wouldn't last long with those speeds. and then there's the tires....standard bike tires are made for only 20-30 mph max.
brakes, you'd need some really good brakes, better than any bicycle disks that you could buy.
then consider the fact that at those speeds, you'd probably make a lot of people mad who have actual motorcycles, who have to pay for insurance and license plates.
if you want to go this fast on 2 wheels, just get a motorcycle.

 

[MotorBicycleRacing]

Has anyone here ever attempted or seen something like it? Not some 600cc beast but just something that goes up to 60-70 mph and qualifies as a motorcycle rather than a moped, maybe a 7 or 8 hp. I don't know a great deal about motorcycles so I'm sure if there is some obvious reason for this or not. I've seen a few youtube vids or 196cc engines on schwinns that can get up to about 55-60, thats practically a motorcycle right?

Check out www.BigBoyCycles.com
They use the 49 cc 4 stroke motorcycle semi auto engines.

The kind of bikes you are describing are being raced this Sat April 7th
at Grange Motor Circuit in Apple Valley, CA in the 11 hp Class.

Big Boy Cycles makes this California legal motorized bicycle.

 

[bando_red]

Thanks for the link MBR. I haven't really been able to find anything like it. Now I know its at least possible.

psycho, perhaps I should have explained better. I'm not talking about just slapping a bigger engine on a bicycle. Reinforcing, modifying and replacing parts where needed. Basically building a motorcycle but instead of a motorcycle frame to start with, it would be a bicycle frame.

 

[motorpsycho]

ahh, i highly modified bicycle frame.
basically a motorcycle with pedals, like where motorcycles originated from.

 

[bando_red]

Exactly. The goal would be to reduce the weight of the bike a great deal, as well as an affordable alternative to purchasing a bare chassis, which all seem to be as expensive as buying a full bike and having it stripped.

Also , to quote Dale Gribble " Plus it looks pretty Badass"

 

[Cavi Mike]

70mph on a bicycle HAHAHAHAHAHAHAHAHA


oh, excuse me, I need to catch my breath


HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAAAAAAAAAAAA

This is stupid.

 

[Neon]

I don't find this stupid at all. This type of thing has been going on for a while. Look at the FX mountain moto. A lightweight Dirt Bike made from as many quality mountain bike parts as possible. There's nothing wrong with wanting to get weight down. Usually though by the time you have made the bicycle safe enough to go at those speeds. Usually the weight is up to full blown motorcycle anyway. Of course some people consider that if you remove the pedals and put on footpegs it's automatically a motorcycle anyway. Another option is to get a motorcycle and start replacing items with aluminum, titanium and carbon fiber to get weight down.

 

[Ibstrange1]

I think that it would be fun to build a chassis from just tubing, but I don't trust my welding ability that much just yet.

 

[Brent Merkley]

my motorcycle with pedals

Hi
This is my interpretation of a motorcycle made from a bicycle.
Brent