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
  #7211  
Old 05-30-2014, 08:25 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by Davezilla View Post
Yup, the one I got is the same as the bottom pic, this is the older style but they work really well once ya get rid of that elastomer ... the elastomers do work but they become a gooey mess once they begin wear out, but swapping it out for a spring eliminates that problem
Excuse my ignorance about those forks.... but where are the elastomers?

I sure like the look of those...
__________________
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote
  #7212  
Old 05-31-2014, 01:51 AM
Davezilla's Avatar
Davezilla Davezilla is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2014
Location: San Antonio Texas
Posts: 2,710
Default Re: what did you do to your motorized bicycle today?

Oh... sorry about that, the elastomers are these rubber cushions they used instead of springs, look on the first pic you posted, see that kinda clear yellow looking thing where the spring should be, kinda right behind the reflector... that's the elastomer they used to come with. They kinda mimic a spring and shock since they absorb the bumps but they don't snap back like a spring without a shock absorber so they're really good for saving weight but they have limited travel and they're a mess when they wear out. Here's a pic of the elastomers... http://www.ebay.com/itm/ProFlex-Girv...item338f92a246 Other brands like Rock Shocks, Manitou, and a few others used to use these back in the late 90's instead of springs and shocks inside their forks...
Basically the spring upgrade kit is just a specially wound spring that supposedly doesn't snap back and the shock has no oil damping, it's just basically a hollow tube with sliding bushings, I ended up measuring the eye to eye distance on mine and ordered a regular shock/spring combo but I'll need to drill and ream the eye holes and either make or aquire some bushings to match the original elastomer shock body.

Last edited by Davezilla; 05-31-2014 at 01:56 AM.
Reply With Quote
  #7213  
Old 05-31-2014, 04:47 AM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: what did you do to your motorized bicycle today?

I guess what through me Dave is when you said you had the forks like in the second pic which already has a spring and I was thinking the ones in the first pic were the ones with the rubber type cushing, gotcha..... nice looking forks.
__________________
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote
  #7214  
Old 05-31-2014, 06:38 AM
knightscape's Avatar
knightscape knightscape is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2013
Location: Maine
Posts: 339
Default Re: what did you do to your motorized bicycle today?

Wow Davezilla, those take me back. I miss those days when suspension was still getting figured out on mountain bikes and they didn't all look the same. I've still got a NOS elastomer Girvin FlexStem I picked up for a buck after those weren't cool anymore. I was always a fan of the AMP Research forks till they went under. The elastomer to spring conversion was also huge on a certain RockShox model, I forget which though. It was just a straight swap that was a more conventional fork too. Inside the fork leg was just stacks of elastomers and you subbed in a single tall spring.
Reply With Quote
  #7215  
Old 05-31-2014, 11:25 AM
Davezilla's Avatar
Davezilla Davezilla is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2014
Location: San Antonio Texas
Posts: 2,710
Default Re: what did you do to your motorized bicycle today?

Thanks... That was part of the reason I decided on this front end... it's uniqueness and the type of suspension system as these ride & handle really well and they can take a beating. This suspension type is called the girder fork or front end and it's been around for decades on motorcycles like the Royal Einfield and several Harley choppers from the 70's thru the 90's (these look killer on a Harley). For ride quality, they are very hard to beat as the suspension doesn't alter the rake/trail as it compresses like telescoping forks so the geometry remains the same regardless of compresion or rebound position. The older motorcycle versions didn't use shocks either, just s set of leather or ruber washers on a pivot and the rider would adjust the "damping" by adjusting the tension on these washers... There's a decent picture of the "friction Disc" shock absorbers on wikipedia, and here's a picture of a 1939 Matchless using a girder fork... http://en.wikipedia.org/wiki/File:Ma...1939_G3L_1.jpg And here's a 1942 Norton with a girder fork and you can see the friction disk shock absorber pretty easily in this pic, it's the hand wheel nut on the lower link on the fork, on the front end of the lower pivot link below the spring... http://en.wikipedia.org/wiki/File:Norton_16H_1942.JPG And in my opinion, these look best on Harley choppers like this sportster with a stretched girder front end... http://www.ironhead-bobbers.com/iron...er_468x317.jpg

Anyway, when looking for a cool unique looking front end for my build I stumbled on these Girvin/Noleen forks from the mid 90's and decided this was the look I wanted as well as offering better ride quality and handeling. I remember back around 2000 I had a Mongoose mountain bike with full suspension and when it got stolen I went to a bike shop looking to replace this bike, the salesman was trying to sell me a Cannondale with a Rock Shock and I was asking him about the suspension, this is where I learned about elastomers because he was explaining to me how the elastomers eliminated the need for springs and shocks in the fork but I didn't trust the elastomers and ended up buying something more conventional.

Hopefully I'll have mine built up today so I can take some pics of it before and after I install it.
Reply With Quote
  #7216  
Old 06-02-2014, 02:57 AM
Cruise's Avatar
Cruise Cruise is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2013
Location: Australia
Posts: 150
Default Re: what did you do to your motorized bicycle today?

Tied a little rag around my float bowl to see if the leak is from top or bottom. Not going to ride it too much until I get a chance to sort that. Petrol vs chain vs other bearings etc.
That's a whole different thread so I won't go into it here.
Aside from that it's running really well now so it's going to get some nurturing. Kind of novel driving my car to work, but I much prefer the bike - traffic sucks!
Reply With Quote
  #7217  
Old 06-02-2014, 05:07 PM
Gideon_459 Gideon_459 is offline
Motorized Bicycle Newbie
 
Join Date: Jun 2014
Location: Texas
Posts: 4
Default Re: what did you do to your motorized bicycle today?

Still at work at the moment, but the plan for the evening is to fabricate a new mount for my cheap led headlight, then dig through some old car parts for a better plug wire.
Reply With Quote
  #7218  
Old 06-02-2014, 06:59 PM
CTripps's Avatar
CTripps CTripps is offline
Motorized Bicycle Elite Member
 
Join Date: Aug 2011
Location: Vancouver, B.C.
Posts: 1,311
Default Re: what did you do to your motorized bicycle today?

I spent some time making the finishing adjustments to another one today.. tightened everything up, soldered the electrical connections and so on.. After that it was fire up and ride around the block, adjust and tweak, repeat a couple of times.

It's a CCM 'Falcon' 18 speed. No build thread on it, but here's a couple of pics:



__________________
CT



-=-

Any day that starts with a good ride is already a better day, and a bad day riding still beats a good day working.

My Builds: My Beast, Harley59's bike, my Cruiser
Reply With Quote
  #7219  
Old 06-03-2014, 12:47 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Smile Re: what did you do to your motorized bicycle today?

Got my new Kenda Kiniption 24 x 2.35 tires in the mail yesterday and I throughly cleaned one of my new 26" wheel master wheels with CRC Brake Cleaner and the mounted it onto the rear of a frame I am gonna turn into a nice bike in the near future and and sprayer several good coats of Valspar Clear Gloss enamel on wheels rim, I spin the wheels so I get an even coat and no runs in the finish, I've noticed that these new chrome rims seem to rust real easy and pretty quick since I guess the chrome is very thin on them, so several light coats of a good quality durable clear gloss finish sprayed on them after a good degreasing and cleaning will seal out the moister and makes the dust wash off easier also.
I dont like rust on my wheels if I can help it and this is a fairly quick and easy way to keep the wheels rust free, the chrome does take on a slightly textured appearance, but it is still shiny and looks just fine in my opinion, just looses a little of the extra slick look since most all enamel has a bit of an orange peel look when it dries.

Here are some pics of the rim after the clear coat and also after I mounted the Kenda k927 Cruiser tires on them that will be on the Schwinn Fleet Cruiser once I get the Frame painted and the engine built for it, by the way this bike is gonna be bright and colorful, building it to stand out and be very comfortable for so long 40+mph cruises, may not be my fastest build so far but should be close to the others and it will definitely be an eye catcher build, I'm pretty excited about this one and hoping it turns out the way I have imagined in my country boy head...LOL!

Map
Attached Images
File Type: jpg 20140603_095724.jpg (302.9 KB, 22 views)
File Type: jpg 20140603_100806.jpg (416.9 KB, 27 views)
File Type: jpg 20140603_111829.jpg (346.9 KB, 35 views)
__________________
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote
  #7220  
Old 06-03-2014, 01:08 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by CTripps View Post
I spent some time making the finishing adjustments to another one today.. tightened everything up, soldered the electrical connections and so on.. After that it was fire up and ride around the block, adjust and tweak, repeat a couple of times.

It's a CCM 'Falcon' 18 speed. No build thread on it, but here's a couple of pics:



Nice looking old mountain bike CT, i have an older Montgomery Wards Mountain bike that lloks to be a very similar set up, it also has the center pull brakes and is a fairly heavy very solid feeling frame kinda like an older Roadmaster USA made mountain bike I also have that was my first motorized bike build.

These kinda frames make some very solid bikes....not the low down cruiser feel but overall sturdy good riding bikes.
Attached Images
File Type: jpg 20131017_192528.jpg (355.6 KB, 21 views)
File Type: jpg 20131017_192629.jpg (336.3 KB, 14 views)
File Type: jpg 30252_126012377426383_100000528657815_230842_6743128_n.jpg (212.4 KB, 21 views)
__________________
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote
Reply

Tags
clutch, motorized bicycle, oil, tensioner

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 04:15 PM.


Sponsors

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
MotorBicycling.com