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cold start

N

nibor

Just got it firing!
Joined
Apr 30, 2009
Messages
16
Location
london
my 2007 nevarda has started to be a real pain,it starts up fine from cold even ticks over ok albeit a bit slow.when i ride off it stalls and falters when it warms up its fine.its like it needs some choke ,the choke control lever on this bike just seems to slightly open the butterflys to increase idle speed.using the choke makes no differance to the problem ,in fact i never used the choke anyway.is there a tempreture sensor perhaps that tells the injection system it needs more fuel when cold.this bike has only covered 2,000 miles ,its a joy to ride.
 
A "choke" closes off the intake so that you get a richer air/fuel mixture.
Most bike carbs actually had an enrichener cicuit that added extra fuel with out restricting air to achieve the richer mixture required.
Modern injected bikes usually either have a fast idled lever that opens the throttle bodies slightly or a idle control valve setup (stepper motor)to add more air and then extra fuel is added by the computer.
Chokes are just a term that has outlasted the device it came from.
 
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