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Hubs, Gearboxes, Sprockets and Chains Can't find 'em, grind em - hubs and transmissions, problems and modifications to make you run smooth and trouble free

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  #21  
Old 12-24-2009, 10:42 PM
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Default re: List of motorized bicycle gearboxes

I took the carb off and had a look at the fuel holes in the side and they are there, but I suspect they are too small, it would be hard to increase the size. They are drilled out under a welch plug. I drilled out the main jet and it is still too small, I have to leave the choke on to make it run WOT. Have fun, Dave
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  #22  
Old 12-24-2009, 10:50 PM
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Default re: List of motorized bicycle gearboxes

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Originally Posted by Egor View Post
I took the carb off and had a look at the fuel holes in the side and they are there, but I suspect they are too small, it would be hard to increase the size. They are drilled out under a welch plug. I drilled out the main jet and it is still too small, I have to leave the choke on to make it run WOT. Have fun, Dave
yep! same here, need to have half choke to run it, but i dont mind, it still goes good
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  #23  
Old 12-28-2009, 12:31 AM
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Default re: List of motorized bicycle gearboxes

heh i must be one of the lucky ones. my carb works great even in this cold weather.
left it out side all day to see how it starts when cold. flip the choke on 2 pulls later it starts. turn the choke off and its ready to go. but if anyone can find a good carb to replace this one im all for it.

has anyone opened the crankcase? i really would like to get a look at the parts used. piston etc.
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Last edited by karma1968; 12-28-2009 at 12:40 AM.
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  #24  
Old 04-10-2010, 10:01 PM
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Default re: List of motorized bicycle gearboxes

Any intentions of updating this list?
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  #25  
Old 04-11-2010, 12:03 AM
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Default re: List of motorized bicycle gearboxes

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Any intentions of updating this list?
I put a link to your build thread. go ahead and put post something about your drive and I'll add it to the first page.
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  #26  
Old 04-14-2010, 11:02 PM
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Default re: List of motorized bicycle gearboxes

Thanks Max!

Just wanted to add the limited edition WhisperDrive to the list. Cake to install and icing to operate, this 1 speed automatic is brimming w/ style and sophistication; A window into the works lets onlookers gaze w/ wonder! The WhirlyGazer Technology also helps you, the rider, check o/a condition at a glance. 3 HD High Speed Sealed Bearings on the Primary Shaft Inspire Total Confidence. The throaty 4 stroke sound through the FBC signature SS pipe is nothing less than assertive. Be the 1st on your block to Command Respect!

Currently in Production the "WD" is a simple and economical 4 stroke kit made (not sourced) almost entirely StateSide. All componants are made right here in the USA except as listed here: the bearings and final drive chain are made in Japan and the sprocket, throttle and grips are made in China. Depending on the motor you use it is likely made in China.

The "WD" comes w/ Drive System, Engine Mount, Wide Cranks, FBC SS Exhaust, Chain and Rear Sprocket.

$440

W/ HD Rear Axle Grubee motorized bicycle Wheel (W/ FreeWheeling Rear Sprocket)

$540

FBC AirFilter and Chain Tensioner available at $20 each w/ order of "Base Kit"

You Buy Only What You Need!

Will work w/ many engines including Lifan, B&S, Honda GX100 and most notably the Harbor Freight 2.5 HP ($109.99 but often on sale for $89.99).

Cheers, Evan

Pls follow these links to see what I'm talking about!

http://motorbicycling.com/f37/new-fr...ent-13442.html

YouTube - ShellyBelly WhisperDrive

YouTube - An evening in front of the FireBelly!

YouTube - FireBelly WhisperDrive in true technicolor extra reality TV

Thanks Again!
Attached Images
File Type: jpg 479.jpg (863.6 KB, 287 views)
File Type: jpg crest2.jpg (1.14 MB, 317 views)
File Type: jpg park2.jpg (1.10 MB, 257 views)
File Type: jpg park3.jpg (1,002.1 KB, 190 views)
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Last edited by tyrslider; 04-14-2010 at 11:09 PM.
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  #27  
Old 08-17-2010, 09:25 AM
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Default Re: List of motorized bicycle gearboxes

Have a look at my gearbox. I designed it myself. It could be lighter but it's tough.
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Last edited by gareth5000; 08-17-2010 at 05:06 PM.
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  #28  
Old 08-17-2010, 03:42 PM
WayneC WayneC is offline
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Default Re: List of motorized bicycle gearboxes

Looks SUPER from my house!
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  #29  
Old 08-17-2010, 09:38 PM
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Default Re: List of motorized bicycle gearboxes

Dig it! Looks like you've adapted some sort of right angle reduction box. Looks tough! Whered you find one w/ the reduction and rpm range! Or did you really make the whole thing?

Cool!
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  #30  
Old 08-22-2010, 04:12 AM
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Default Re: List of motorized bicycle gearboxes

Yeah, I adapted a reduction box I found. It has worked out well.
It freewheels and rides like normal pushbike. The motor is powering the front sprocket so there is only one heavy duty chain running to the 7 speed Shimano. It can climb anything in first gear and cruises at 35-40 kph in seventh, more if you pedal.
I've had a few brainwaves since I built this, I'm looking forward to building mark3.
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File Type: jpg bike012 (Large).jpg (162.2 KB, 307 views)

Last edited by gareth5000; 09-17-2010 at 06:28 AM.
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