Cold Blooded Starter

[NitramA]

The bikes always been a bit hesitant when cold, needing a good couple of miles before its settled down, but last time I went out (it was sunny but nippy) I couldn’t pull away without it dieing on me.

The choke had an effect, but not enough to stop the engine bogging down when trying to move away.
Once I did manage to get going, it ran perfectly, tick over is fine and I get good power through the rev range.
I cleaned out the carbs this year so I know its not all gummed up.
Whilst the bike is an 05 its done less than 10k miles and is always garaged so all the rubbers are perfect.
Any ideas?

[crussell92]

I had a 2002 bandit that used to do this. Fine when warm but cold it didn't want to go. Turned out one of the choke sliders wasnt opening/closing with the rest on carb no 2, so id operate the choke and see if you can visually see them all operating.

[NitramA]

Hmm this problems become more noticeable again.
Everything is fine if I let the engine warm up before riding off, but if I try to go too soon the engine just bogs down.


Whilst I did clean out the bottom end of the carbs, I’m pretty sure I didn’t look at the choke other than making sure the slider moved in and out freely.
Before I try again, I’d like to understand how the choke circuit works. I seem to remember seeing a post that described how the carb worked throughout its operating range.
Buggered if I can find it though!
Can anyone point me in the right direction?

[Anquetil]

Hi NitramA.  I have had a 2005 Fazer 1000 for the past 6 years and I never pull away with a cold engine, because it will bog down. If I'm going out for a ride I start the engine and leave it running whilst I am putting my gear and helmet on, so it's well warmed up. Never had any problem.

[NitramA]

Maybe it’s not a problem then!
I thought it used to lift the tickover and I had to stop the revs going to 3k or so as it warmed up when I had the choke on, but maybe that was another bike.