MBA Motors Mortorized Mountain Bike Anyone?? Has anyone heard of a MBA motors MB?

[calpolymike]

I have searched here and nobody seems to have one.


anyone??? anyone??


has battery, button start, grip throttle, transmission for nuteral, gas tank
incorporated in the frame. suspension.

Anyhow, the problem is that it has no torque to go up hill....its great going
flat, and some grade, but where I live now...its not cutting it.

can anyone help??

CLICK PICTURES TO MAKE THEM BIGGER IF YOU WISH

CLICK PICTURES TO MAKE THEM BIGGER IF YOU WISH

 

[calpolymike]

 

[darwin]

Looks like a 52cc motor, my best guess is in the ratio of the sprocket/pullies. 50cc 2stroke should pull with some giddyup on the hills. When you have direct drive you either have a choice of speed or torque or a compromise of both.

 

[loquin]

Got to agree with darwin here. What are the diameters of the two sets of belt reduction pulleys? The first one looks to be a synchronous (toothed) belt; in this case, what is the number of teeth on each pulley?

In order to increase torque (and improve hill-climbing ability,) you'll need to increase the diameter of the driven pulley/sprocket and/or decrease the size of the drive pulley/sprocket. This will decrease the top end speed, however.

For hill-climbing ability, the total drive ratio should be at least 20 (or maybe more) for a 26 inch wheel an a motor spinning at a max of 7800 RPM. Note that you need to calculate the ratio of driven/drive pulleys for each reduction stage, then multiple the ratios together.

In your case, if you had 2 stages, with the first stage being 10T:25T, and the second stage being 3":10", the total reduction would be

(25/10) * (10/3), or 9.25 to 1.

You can use one of the reduction apps on the site to help with this. Also, if you know the slopes you'll be climbing and the engine power output, you can use the power calculator to see what your maximum ratio needs to be to get you to the top (at a specified speed.)

 

[calpolymike]

Here you go.

i hope this helps.



I CANT BELIEVE NOBODY has this bike....nowhere!!

i took the drive belt off, going to replace it today.

 

[Richard H.]

I CANT BELIEVE NOBODY has this bike....nowhere!!

I do believe I've seen mention of the bike somewhere in the distant past, can't recall exactly but it might be here in the archive.

So, where did YOU get it, are they still in business?

 

[calpolymike]

They are long gone.....

they were based out of korea....the whole bike was designed on a computer.

 

[calpolymike]

Got to agree with darwin here. What are the diameters of the two sets of belt reduction pulleys? The first one looks to be a synchronous (toothed) belt; in this case, what is the number of teeth on each pulley?

In order to increase torque (and improve hill-climbing ability,) you'll need to increase the diameter of the driven pulley/sprocket and/or decrease the size of the drive pulley/sprocket. This will decrease the top end speed, however.

For hill-climbing ability, the total drive ratio should be at least 20 (or maybe more) for a 26 inch wheel an a motor spinning at a max of 7800 RPM. Note that you need to calculate the ratio of driven/drive pulleys for each reduction stage, then multiple the ratios together.

In your case, if you had 2 stages, with the first stage being 10T:25T, and the second stage being 3":10", the total reduction would be

(25/10) * (10/3), or 9.25 to 1.

You can use one of the reduction apps on the site to help with this. Also, if you know the slopes you'll be climbing and the engine power output, you can use the power calculator to see what your maximum ratio needs to be to get you to the top (at a specified speed.)

you see my pics?? what do you think?

 

[calpolymike]

anybody seen this bike anywhere??

i still havent found 1 person with this same exact model...
:shrug:

 

[Mexico-Luis]

I had one. Got it stolen. Would you be willing to sell yours? I loved mine. I live on a flat area and they work great here.