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
  #401  
Old 10-01-2010, 02:15 PM
bairdco's Avatar
bairdco bairdco is offline
a guy who makes cool bikes
 
Join Date: Aug 2009
Location: living the dream in southern california
Posts: 6,273
Default re: Motorized Bicycle Take a Tip...Leave a Tip

the intake manifold. either where the carb mounts or where it mounts to the engine.
Reply With Quote
  #402  
Old 10-03-2010, 12:30 AM
WildAlaskan's Avatar
WildAlaskan WildAlaskan is offline
Motorized Bicycle Elite Member
 
Join Date: Sep 2010
Location: alaska
Posts: 581
Default re: Motorized Bicycle Take a Tip...Leave a Tip

ok so i have a few tips i hope they are helpful

start by upgrading the throttle assemly to something more real i personaly use a brake lever after mine broke far from home i had to pull the cable by hand to get home it wasnt safe but beat pedaling

second when attaching rear sprocket to rear wheel use a wrench for the inside of the wheel and a drill gun with torqe settings for the outside start low and work your way around trying to keep everything alligned the gradually work the torq up till its maxed out on mine his was at five i dont know how accurate these torque specifactions are but i havent had any problems

third if your spark plug boot comes off when riding this worked in my case i just took the end of the wire and slide it over the plug it has been working fin for the last few weeks there is no boot just a wire im not sure how much less spark it has im sure the boot is the best wayto go but in a bind make it home
Reply With Quote
  #403  
Old 10-03-2010, 12:50 AM
WildAlaskan's Avatar
WildAlaskan WildAlaskan is offline
Motorized Bicycle Elite Member
 
Join Date: Sep 2010
Location: alaska
Posts: 581
Default re: Motorized Bicycle Take a Tip...Leave a Tip

ok to continue on from earlier

having double walled rims is a good idea and tires that match your driving style rough nobby tire for off road trail use and smooth tire

now in the past i have used back packs to carry extra tools but that was ok if i didnt forget to grab it before i left but now i have a old ammo pouch large enough to carry basic tools adjustable wrenches fixed wrenches a few sockets and extensions and also handy are those small screw drivers with short handles were the bit comes out and you have two bit in one and one thing thats necasarry is a allen wrench multy tool as most new bike they us allen bolt heads

oh yah and carry extra a intertube chain lube and a small bike pump they dont work well but they get ya home
Reply With Quote
  #404  
Old 10-03-2010, 01:04 AM
WildAlaskan's Avatar
WildAlaskan WildAlaskan is offline
Motorized Bicycle Elite Member
 
Join Date: Sep 2010
Location: alaska
Posts: 581
Default re: Motorized Bicycle Take a Tip...Leave a Tip

ok so i forgot one more thing a couple weeks ago i was riding my dads bike and it kept dying on me not getting enough fuel i took the carb apart everything was fine adjusted the tabs after it didnt work then found the fuel was being blocked by the fuel valve so i thought ok something must be in there but it ws clean the petcock filter was clean but still no flow just a dribble so i went to lows put three fittings to make a straight flow adapter it worked fine but i thought why did the original valve got stuck i took it apart and still found nothing to obstruct flow

it was the very valve design that caused the failure the fuel inlet tube was a smaller diameter than the outlet valve so i found a drill the same size as the out valve and drilled thye inlet the same size and also drilled the flow ports so now it has great flow the problem has gone away

now i did this with myn petcock to and later had the same problem with fuel flow it turned out a peice of inline fuel filter was pluggi9n the carberater so i dont know is this may hep others out but unrestricted flow of fuel must be good cause the float shuts the supply off when it needs to just turns off sooner cause the float fills faster

and for some reason both bikes start better maybe that was from bending the float tabshttp://motorbicycling.com/images/smilies/dfl.gif
Reply With Quote
  #405  
Old 10-03-2010, 01:13 AM
WildAlaskan's Avatar
WildAlaskan WildAlaskan is offline
Motorized Bicycle Elite Member
 
Join Date: Sep 2010
Location: alaska
Posts: 581
Default re: Motorized Bicycle Take a Tip...Leave a Tip

ok so i forgot one more thing for the stock exaust falling apart cause the nut vibrates off i use a wire clamp i make from a jig i bought at a sportsman show i googled it but havent seen any pictures to explain but a regular wire clapm should co as long as its small enough
Reply With Quote
  #406  
Old 10-04-2010, 03:04 AM
FreeWheeler FreeWheeler is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2010
Location: Maryland
Posts: 240
Default re: Motorized Bicycle Take a Tip...Leave a Tip

If your dustcap needs to be trimmmed when installing the sprocket, fuhgettaboutit. Get a ziplock sandwich bag and cut off a side of it(single sheet of plastic) and put a hole in it for the axle and such to fit through. Get some bearing grease and grease up the sprocket and axle area. Place the plastic from the sandwich bag over the axle and lay it flat as possible. Now, take some silicone gasket sealer and smush it around the area which the old dust cap covered. Take some more grease and smear a coat on the brake arm and bolt it down for now. Let it cure and then remove the brake arm and lift the silicone off the axle. Trim it up with some scissors to make it pretty.

Silicone sealer wont stick to grease.
Reply With Quote
  #407  
Old 10-04-2010, 08:48 PM
FreeWheeler FreeWheeler is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2010
Location: Maryland
Posts: 240
Default re: Motorized Bicycle Take a Tip...Leave a Tip

This isnt the greatest tip, but if your cap is messed up and you need something to try to keep dirt out then the above works. I had tried string wrapped around the cap area which worked, but I wanted something that could slip on and off, so silicone. You only need a trace of grease anywhere you dont want silicone. Too much and you'll have uncured silicone to clean up.

Here's my cap in the attachment.
Attached Images
File Type: jpg SiliconeCap.JPG (59.8 KB, 139 views)
Reply With Quote
  #408  
Old 10-07-2010, 02:17 PM
killercanuck's Avatar
killercanuck killercanuck is offline
Motorized Bicycle Elite Member
 
Join Date: Dec 2009
Location: Wallaceburg ON
Posts: 1,752
Default re: Motorized Bicycle Take a Tip...Leave a Tip

Makeshift Cruise Control - If you're sick of the blister on your thumb from holding your throttle in place, check this out. I had the idea last week and it works great, sorry if its been posted before.

Okay, so what you do is lightly loosen your throttle handle, and pull on it until the throttle 'drags' on the end of the bar just enough to hold its position, but not enough so you have to 'crank' on it(that could be dangerous). Then you just re-tighten it while still pulling on it. Don't over-do it, but you get the idea. I've done this on both my bikes now and love it. No more blisters!


__________________
Cards, 29er, Trailer, Hack'em'up
Build with pride! Build to ride!
"A clean shop is a sure sign of a cluttered mind" ~ fasteddy
Reply With Quote
  #409  
Old 10-07-2010, 04:47 PM
DanielMaia's Avatar
DanielMaia DanielMaia is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2009
Location: Portugal
Posts: 309
Default re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by vespasian View Post
Here's a hard learned tip: If you find that you need to turn the idle screw all the way in or close to all the way in, you have an air leak. Get it off the road asap! and find/fix it, or you'll cook the piston and destroy it, and the jug.
Other thought is: The needle on the carb are too much "upper", i mean, the needle has to down 1 or 2 positions.
Reply With Quote
  #410  
Old 10-08-2010, 10:01 AM
fm2200 fm2200 is offline
Motorized Bicycle Elite Member
 
Join Date: Nov 2008
Location: new york city
Posts: 258
Default re: Motorized Bicycle Take a Tip...Leave a Tip

killercanuck, It makes it even easier if you get a twist grip throttle like a lot of the mb's have. There not that costly, and then you have a throttle like a motorcycle.
Reply With Quote
Reply

Tags
advice, bicycle, motorized, repair

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 07:00 AM.


Sponsors

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