Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Reply
 
Thread Tools Display Modes
  #21  
Old 06-29-2016, 11:13 PM
msrfan msrfan is offline
Motorized Bicycle Elite Member
 
Join Date: Sep 2010
Location: Southern California
Posts: 1,628
Default Re: New Project

Mike, there's a spoke length calculator that tells you step by step how to order the correct spokes.

http://www.bikeschool.com/tools/spoke-length-calculator

But I can tell you right now that all the moped hubs I've laced into 26'' wheels fit with 270mm long spokes and a cross 4 pattern. I've probably done a dozen or so over the years.
Reply With Quote
  #22  
Old 07-11-2016, 04:33 PM
Mike Stroz Mike Stroz is offline
Motorized Bicycle Member
 
Join Date: Sep 2015
Location: Shrewsbury, MA
Posts: 40
Default Re: New Project

Looks like I'm gonna be building my own wheels after all. I got some heavy duty worksman rims and I'm gonna be ordering some 11 gauge spokes as soon as I figure out what size I need. Just rebuilt the brakes this morning with new pads and put on some new cables. I also got a second motor with the crank I needed and swapped that over (still haven't tested with the new crank), and stripped off all the pieces I don't need off the motor. I'll post some pictures once I make any noticeable progress with it. I'm thinking as a temporary motor mount, I'm gonna use some angle iron clamped to the frame till I get around to cutting some custom mounts and getting those welded on. I might also have to file down the torque converter sprocket so it fits a 415 chain as opposed to the 420 since the rear sprocket takes 415
Reply With Quote
  #23  
Old 07-18-2016, 10:39 AM
Mike Stroz Mike Stroz is offline
Motorized Bicycle Member
 
Join Date: Sep 2015
Location: Shrewsbury, MA
Posts: 40
Default Re: New Project

Finally got the wheels measured and spokes ordered. Is it ok that I got 248mm ones? They measured to be 246mm, but it was either 245 or 248.
Reply With Quote
  #24  
Old 09-05-2016, 08:56 PM
Mike Stroz Mike Stroz is offline
Motorized Bicycle Member
 
Join Date: Sep 2015
Location: Shrewsbury, MA
Posts: 40
Default Re: New Project

Ok, so I'm finally starting to get back into this project, but I don't think I'm going to build it as I originally intended, at least for now. I just want to get it going and get out on the road now. So I'm going with some pre built heavy duty wheels, since I'm sick of waiting for the parts for custom ones. I'm also going to get a pre built motor mount that bolts onto the frame, and I'm going to throw on a Predator 79cc engine for now. I measured it up and I know I can pretty much do a straight swap to the Briggs 5 horse once I frankenstein that thing together. Just wondering what I should order for sprockets now. The torque converter I got has a 10 tooth sprocket, and I have 26" wheels, plus the torque converter, so what size should I use for the rear sprocket? I'd like to have good torque and a reasonable top speed, maybe 30-35.
Reply With Quote
  #25  
Old 09-06-2016, 04:43 PM
Austritch Austritch is offline
Motorized Bicycle Newbie
 
Join Date: Apr 2016
Location: NC
Posts: 17
Default Re: New Project

I too am having thoughts about wheel building. Local bike shop was no help at all! My bike was a donor Mongoose Dolomite fat tire bike with dual disc brakes and steel deep-dish rims. The thoughts I am having are because I am running a GY6 150cc engine and if the the stock hubs, spokes, and rims can handle that kind of power. I have all the details of the build on an album in my profile. For some reason I can't get any pics to load on the thread. I have been thinking about maybe upgrading the spokes to 11 gauge before I try to ride it. Does anyone have experience with this kind of build? Are there any pre-built fat bike wheels sets that would be strong enough? Keep in mind that I will be mounting the rear drive sprocket where the rear disc brake rotor should go, utilizing the existing mount plate and bolt pattern on the hub. This bike will not be ridden hard. I will be cruising at speeds of 35-40mph and have some left over power to get out of the way of trouble. Thoughts? Comments? Questions? Concerns?

Last edited by Austritch; 09-06-2016 at 04:49 PM.
Reply With Quote
  #26  
Old 09-06-2016, 05:11 PM
curtisfox curtisfox is online now
Motorized Bicycle Elite Member
 
Join Date: Dec 2008
Location: minesota
Posts: 3,721
Default Re: New Project

Quote:
Originally Posted by Austritch View Post
I too am having thoughts about wheel building. Local bike shop was no help at all! My bike was a donor Mongoose Dolomite fat tire bike with dual disc brakes and steel deep-dish rims. The thoughts I am having are because I am running a GY6 150cc engine and if the the stock hubs, spokes, and rims can handle that kind of power. I have all the details of the build on an album in my profile. For some reason I can't get any pics to load on the thread. I have been thinking about maybe upgrading the spokes to 11 gauge before I try to ride it. Does anyone have experience with this kind of build? Are there any pre-built fat bike wheels sets that would be strong enough? Keep in mind that I will be mounting the rear drive sprocket where the rear disc brake rotor should go, utilizing the existing mount plate and bolt pattern on the hub. This bike will not be ridden hard. I will be cruising at speeds of 35-40mph and have some left over power to get out of the way of trouble. Thoughts? Comments? Questions? Concerns?
If the rims are steel they should hold up fine, i think i would use them as is as not using a rag sprocket mount. Then if you see any signs of fatigue, you could lace in the 11 gage spokes............Just my thought............Curt
Reply With Quote
  #27  
Old 09-06-2016, 05:33 PM
Austritch Austritch is offline
Motorized Bicycle Newbie
 
Join Date: Apr 2016
Location: NC
Posts: 17
Default Re: New Project

Thanks Curt! As a follow up question: Are you suggesting that i mount the sprocket to the 14 gauge spokes? Or continue to utilize where the 6 bolt rear disc brake rotor should go?
Reply With Quote
  #28  
Old 09-06-2016, 06:31 PM
curtisfox curtisfox is online now
Motorized Bicycle Elite Member
 
Join Date: Dec 2008
Location: minesota
Posts: 3,721
Default Re: New Project

Ya give it a try and see, you can always redo the spokes later if it starts to fatigue. In the mean time practise on some old rims you might want to use later down the road.......Curt
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 07:20 AM.


Sponsors

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
MotorBicycling.com