They sell these kits on epay..

http://www.youtube.com/watch?v=G_CwramJ ... re=related

A co-worker of mine actually rides one of these to work every day.

I ordered one last week, $150, should be here Tuesday.

Exciting little project that should be real enjoyable when finished.

What bike are you putting it on?

Do you have an eBay link to the kit you bought?

It looks like it could be fun..... just be safe riding!

Just don't get caught (or killed). I can't imagine where those would be street legal, since 50cc is usually the limit for mopeds. I'd only put it on a bike with fairly wide, knobby tires and caliper rather than coaster brakes. With thin tires you risk going flying as soon as you hit any gravel at speed, and that much power will probably rip apart a coaster brake hub in short order.

Bob

According to the MSF (Motorcycle Safety Foundation ) , , An unprotected head making contact with a solid object at 5 or greater MPH has a 90% chance of ending up with a scrambled brain .


Beyond that , the bike in that video was kinda loud compared to the average moped . I'll bet the Police wouldn't notice the difference between 50 and 66 CCs , but I'll bet they would notice the annoying buzzing chainsaw sound

I've seen units on Ebay that were far more compact , quiet , and produced a less "cobbled together" look when assembled .........

I have the 49 cc version and yes, these are much fun. Have at least 1000 miles on mine!:) Had to replace the stock chain with an oversize one, install a spring loaded idler, replace the original intake tube, hand fit the engine and use metal shims at the front motor mount and have the rear wheel bearings doubled up. Be sure to use a really good grade of two stroke oil also. Down here, the police don't notice, although they are severely restricted someplaces. In Texas, 49 cc is totally legal and I have never been stopped. Still wear a helmet! The motorized bike forum is also very helpful. My .02-Gearhead-PS-Almost forgot, but I hope that you ordered the universal motor mount. These are just U-bolts that adapt to your existing mount. The engine in the video has the stock mount, which has the user drill a hole through the bottom tube-not good!

Every state has different laws. I looked into it briefly and around here its hardly worth it. Also- if you're going to go that fast, you definitely need to wear a helmet and a "real"one, as in a motorcycle helmet.

Make sure they are legal in your area. I believe Maryland is pretty lenient and you should be okay, but I know they are illegal in Pennsylvania, as they are technically a motorcycle, and would have to pass an inspection (which they never would). In the past few years, I have seen a few people try to start up their own little "dealerships" for these things here, claiming they can be made street legal, only to wind up with lots of angry customers.

Strangely enough, at least in this state: while putting a combustion engine onto a bicycle is a no-no, putting an electric motor is not. In fact, I don't believe you are required to do anything for an electric bike to be street legal (no registration, etc.).

Another issue I have for these kits is that the parts really poorly made, and they just don't seem to hold up. I did know of a local guy who had one (rode it illegally) and after a couple of months, the motor was puking oil around the headgasket and making bearing noise. That could have been all due to abuse, but I was still not too impressed. I seem to recall some vendors selling "upgraded" kits, where they provided a much better chain, carb, etc, basically throwing away everything but the engine itself.

One final concern I have always had with these is that bicycles are typically not made to endure the stresses that a motor of any size would put on them. That's why I went with a late 70's two-stroke moped, a much more efficient mode of transport. A moped is a lot more rigid for this kind of work, plus there are tons of aftermarket kits to turn them into 50mph machines, if you are so inclined.

Fun looking toy, but I tell ya what - if the bozo in that flick went flying around my town like that he'd righteously be side-swiped right into one of those telephone poles.

Some of those beach cruzer bikes are pretty sturdy and should hold up well. I occasionally see them at thrifts in good condition for $40 and under. I'd recommend one with a coaster brake (like in the video).... they lock up pretty good and will choke down the engine quickly in hairy situations....

Wyatt , Just be careful and follow the good advice you've been given . Make sure the bike is strengthened to take the abuse. ( I've seen some crappy welding on some cheap and not so cheap bikes , that wouldn't take much for the welds to fail . ( including the front forks)

.... or better yet buy a good low CC MC or a moped .

Yes , wear a helmet and don't drink and ride !

good luck ... have fun .... ah youth

( if i was you age it does look like a cool project with the right mods.)

some links :

http://motorbicycling.com/showthread.php?t=15922

Also an :

old school Whizzer 1951



http://www.google.com/imgres?start=89&h ... =122&ty=88




1951 Whizzer Ambassador Motorbike
Whizzer Ambassador 1951 motorbike


1951 Whizzer Ambassador Motorbike
One Year Production Only - Color Black
1,128 produced
"Big, Rangy, Rugged"


Specifications:

"S" model Whizzer motor
4-cycle motor
3 horsepower
Built-in generator
Pedal operated brakes
Internal brake shoes
5-inch heavy gauge steel drum
Heavy-duty frame
Reinforced welds
Heavy gauge tubing
Welded motor mounts
Welded spring fork stop
Dual coil telescope spring fork
Quick kick starter
Hi-low beam headlight
Large motorcycle type adjustable 3-point mounted saddle
Deep tone, bright chrome echo tube exhaust pipe
Options: 5" front brake; Whizzer speedometer; Fender Tips, Front Fender Rails and Schwinn Fender Bomb

I used to have one of these Yamaha Champ 50cc Scooter. It was great for getting around the city. (Easy to put a bag of groceries between you legs on the platform.) I still miss the thing.

Bob

http://www.youtube.com/watch?v=gsUp68l44Ho

yep, a lot safer .

Yeah, it was really stable with those small, fat tires. I felt far more safe on it that I did on a bicycle, and with that two-speed tranny it did a good job going up the hills. Being made almost entirely of metal (at least where it counted) it was very durable. Great little piece of design and engineering.

Bob

I've seen gearhead's photos of his bike, and it's the real deal. I want one of these, too. The best engine is a 49 cc Honda GX series. Being 4-cycle, it has a very nice sound. Apparently there used to be companies that would sell it in their kits, but now all I've been able to find are the Chinese Honda engine clones. They are much less expensive.

I have a few weedeater engine and a bicycle laying around awaiting this treatment.

I would also make sure that if the kit doesn't come with some sort of brake upgrade to look into getting something like that. Plain bicycle brakes aren't made to slow down something going that fast. You'd probably burn them up if you weren't careful.

Wyatt, Make sure you get a a real nice colored leather jacket. Red , green, Pink whatever. Then join a club. There are more then a few out there. A few that come to mind are The Bandidos, Highwaymen and Warlocks. I have heard these are a bunch of fun loving guys and will add some excitement to your life
Stan Ski

Kind of late to this thread, but I just got this bike and motor working this week. Bike is a 1979 Schwinn Heavi-Duti I bought at a bicycle swap meet in Ann Arbor a few years ago, basically a beefed up version the the Typhoon. Motor is a 1975 or so Sears Free Spirit, a version of the Tanaka Bike Bug engine, found on ebay a few years ago. It took a lot of work and testing miles to work the kinks out of the combination, seemed to have a lot of problems with the fuel system, and several times had to go back out looking for parts that had vibrated off. Speed is probably between 15 and 20 mph. Also had to work on the bike's front wheel bearings as they would not hold adjustment.



The engine cover goes on after I get my new gas cap (cracked). Not cmpletely sure if I'm going to put this cover on or keep the elemental wacker motor appearance.

I'm definitely considering wearing a helmet. I still have a pair of regular motorcycle helmets from my motorcycling days. Things, approaching blind drives when a car is flying out and such, do happen much quicker, even If I try to keep the speed down

Kid your age should be using a pedal bike just to stay in shape.
Kids today have to many things that don't use the good ole muscles anymore.

The good news is in New York go-karts, mini-bikes, dirt bikes, and motor-assisted bicycles do not have to be registered. But the bad news is that none of these contraptions can operate on any public street, highway, sidewalk, or parking lot.

A couple of my friends have that same kit. Neither have lasted long, though they have both taken care of them. Remember that there is generally NO oil added to anything from the factory, so tear all of it down and grease it up. Be sure the primary gears have a bit of oil, not to much, or it will get the clutch oily and not work well. Also, they can come with the porting broken from the factory, they are thin to begin with and don't often fair well through cleanup and machining, but they still use the broken ones occasionally anyway. We have had CDI problems many times, too. If it drools out alot of oil and has no power and changing the air fuel mix doesn't help, the CDI is your problem.

I have a bicycle from the 60's some time I put a Tecumseh 3.5 horse 2 stroke on. I have had it up to 30 before. I am afraid to go any faster in fear of breaking something. The engine must be at about 6000 RPM going that fast and sounds like a little airplane going to take off. I already had the con rod break once, but those motors are in everybody's garage so they are dirt cheap. I think I paid something like $10 for the one in there now. I have a New Departure coaster in the rear with a clamp I machined to fit the hub shell on which the sprocket turns, so unlike your kit, it tugs on both sides of the spokes equally. It has 14 gage spokes and pretty heavy old Schwinn S7 rims on it (they're double walled and THICK). I built the wheels myself. In the front I have a Sturmey Archer 90mm drum brake meant for a tandem, so I have plenty of stopping power. The clutch is a V belt tensioner that can be loosened, it is one of the kevlar belts so it is good for clutching. And yes, I have a cover over it. I need new forks for it, the old ones weren't very good and I don't really trust them. It needs a weird size, though, so it might be a while. Right now I am trying to find either knobby S7's or some way to make them knobby (fixing mountain bike tread to the outsides, strong tire chains, etc) so I can ride in the snow this winter. It is fairly reliable, too.

Speaking of the gangs, I was seen with it and got inducted into the local "moped gang", who goes by the Mopedophiles. I really don't know what to think. I don't even know if they are the local moped gang or the only moped gang. They are mostly guys 35-70. Odd bunch. This whole town is kind of funny.

Anyway, you will have a good time with that.

-Brian