Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Bicycle Motor > Motorized Bicycle Trouble Shooting

Motorized Bicycle Trouble Shooting Use this area to post problems that may arise, if you could use some help in figuring out what is wrong with your engine and what needs to be done to achieve top performance.


disappointed with my cns carb

Use this area to post problems that may arise, if you could use some help in figuring out what is wrong with your engine and what needs to be done to achieve top performance.


Reply
 
Thread Tools Display Modes
  #1  
Old 03-09-2013, 04:01 PM
hcrft hcrft is offline
Motorized Bicycle Member
 
Join Date: Jan 2013
Location: NORTH CAROLINA
Posts: 28
Thanks: 13
Thanked 0 Times in 0 Posts
Default disappointed with my cns carb

my schwinn is destined to have a performance carb, boost bottle, nitrous, a tuned pipe , and shift kit. i decided to start with a cns carb. IT SUCKS. the only time the bike makes any real power is right before the engine runs out of fuel. otherwise, if the fuel valve on the tank is open, the engine is flooded, and bogs down when i open the throttle.if tried all the obvious combinations of needlevalve settings, fuel settings (from rich to lean), covering or uncovering the two tube ports on top of the carb, and the results have been different variations of the same problem.im going to go back to the stock carb, and if the jet in the cns carb is bigger than stock, i will swap them. SO DISAPPOINTED in the carb!!
Reply With Quote
  #2  
Old 03-09-2013, 04:45 PM
Bikeguy Joe's Avatar
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
 
Join Date: Jan 2008
Location: Out in the wilds of Ashtabula County
Posts: 11,760
Thanks: 39
Thanked 59 Times in 46 Posts
Default Re: disappointed with my cns carb

Wait until you install the boost bottle...
__________________
If it ain't broke, and you mess with it long enough, IT WILL BE.
Reply With Quote
  #3  
Old 03-09-2013, 07:32 PM
maniac57's Avatar
maniac57 maniac57 is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2011
Location: memphis Tn
Posts: 3,835
Thanks: 306
Thanked 457 Times in 404 Posts
Default Re: disappointed with my cns carb

Yet another person who did not know what they were buying, just heard "FASTER!!!"
The CNS needs to be tuned to work right by someone with some understanding of exactly what a carb does and how adjustment changes things. You should read up on tuning these carbs here in the forum before you get mad. There is plenty of information if you take the time to learn and you will surely have much better results than just bolting stuff on and nailing the gas....
There is no such thing as a free lunch.
Reply With Quote
The Following User Says Thank You to maniac57 For This Useful Post:
  #4  
Old 03-09-2013, 08:10 PM
Greg58's Avatar
Greg58 Greg58 is offline
Motorized Bicycle Elite Member
 
Join Date: May 2011
Location: Newnan,Georgia U.S.A.
Posts: 2,127
Thanks: 44
Thanked 114 Times in 108 Posts
Default Re: disappointed with my cns carb

The cns needs the float set correctly to compensate for the carb angle, if yours runs better right before it runs out of fuel try bending the float tang to close the needle sooner. As for the jets they are not the same thread size as the nt.
__________________
Your results may not be the same,Greg
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 10:35 AM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
MotorBicycling.com