motorized bike

http://www.amazon.com/PK80-2-Cycle-Engi ... roduct_top

any one ever try one of these Chinese crap, engine bike kits? looks like it could be fun...

 

I haven't used the chinese kits, but there's this one that looks pretty fun to ride. At 2,9k it is a bit more expensive though



http://www.kickstarter.com/projects/210 ... ed-bicycle

 

You answered your own question.

I've followed a few builds using Chinese engines and they can work, but you'll be chasing your own tail before you get it to work reliably.

Try asking here: http://www.motoredbikes.com/forum.php

You might find what you need.

 

holly hell, that looks so sick, i can't imagine thats remotely street legal though?

i ride (in MN, mahtomedi) on 2 wheels 365, i am looking for something to get through the couple days where there is still a little snow on the road, right now if it the road isn't plowed i ride a bicycle, or the gs450(which is so light it's hard for me to lose all control, still not the greatest idea most the time though) that's why i figured a motorized bike could only help, cuz if the motor doesn't start, then i just break even for bicycling.



i live about 2 miles from my job, 30mph limit back roads.

i've been looking at street legal dirt bikes, and dual sports too.

 

ya, i have found that forum, basically it sounds like if i have 2 motorbikes, ( always working on one or the other) i can assume that atleast one will be working 75% of the time, assuming i keep them maintained. terrible, but if i really get those odds, i'd be happy enough, the plus side is that you can still ride it with peddles when the engine craps out, unlike the Chinese scooters.

 

Haha, that motorcycle looking bicycle looks very cool! I picked up a 4 stroke motorized bicycle engine kit last year from http://bikeengines.com/ and have been very pleased with it. Good gas mileage and very minimal repair.

If that one up there that looks like a motorcycle wasn't so much money, I'd be very tempted!

 

You sure you wouldn't always be working on both?

 

http://www.electric-bikes.com/bikes/kits.html#BMC
you sound like your in a area where something like these would be ideal. watch out though, you'll get more questions and comments than if you rode in on a Orange County chopper

 

Here is a writeup from someone who is building the Motoped kit. So long as it meets the legal requirements for a moped (or for a motorized bicycle) it would be able to be ridden on the street (state laws vary). http://advrider.com/forums/showthread.php?t=994498

 

I know this post is 2 years old. But my Chinese 66 cc motor has held up very well.
If you are wanting one you should shop around you can find the Kits for about $40 less. My only advice is keep an extra cdi and magneto Handy

 

I give this thought now and then.

What bothers me most is that you are keeping bicycle brakes and going a lot faster.

 

Hell I've been over 50mph on a bicycle (yes it was downhill thanks for asking) and could still modulate the cantilever brakes well enough to lift the rear end. Bicycles are generally overbraked if the brakes are adjusted properly and aren't some Huffy junk.

 

But the mass being stopped isn't being increased by much. As Bigshank pointed out, a decent set of bicycle brakes is up to the job.

 

You should go to a bikeshop and check out the hydraulic disc brakes on downhill mtn bikes. They've got better tech than a Seca!

 

Rim brakes of any type isn't something I'd want to rely on on anything motorized. Heat issues, easy contamination... Meh.

If I ever do wind up building one of these contraptions, I would at the very least switch to a drum brake. Something like this:

https://jet.com/product/detail/a4cb...K0c0Hg151GD3qHVWct_jbCLbs4VTuaCWn0aAj8n8P8HAQ

 

Trouble with hydraulic disc brakes is that you need to have a frame and fork designed for them. Just welding on mounts may or may not work right, and brakes are one area where I wouldn't want to cut corners.

A mountain bike with one of those motors is goofy. A beach cruiser looks much better, like an old-timey Harley or something.

 

I have mine mounted on a beach cruiser. All it has is coaster brakes. I cruise at about fifteen mph. Tops out at thirty five mph. It has alot of engine braking. If I can get a picture to upload to the forum I'll post one.