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Fuel/Air Mixture screws?

Posted: Thu Apr 22, 2010 10:29 pm
by madmike
Something I've started to notice is I think my bike is running a bit... Rich. After owning it for a year now and messing with it non stop it finally starts great and runs great! So I really don't want to mess around unless I'm 100% sure.

Hearing a few bikes start and the revs sound about 2-3000rpm

The choke keeps the idle quite high, I've heard a lot of bikes do this. My GF's dad's CBR600F Today for instance...

Now when I cold start mine the highest the idle will go is about 1200rpm and any more choke than that and it floods and just cuts out. Since it does start and idle and when its warm it runs fine anyway I'm sticking to the "If its not broke... Don't fix it!"

But is this because a screw or two is set too rich?

Re: Fuel/Air Mixture screws?

Posted: Fri Apr 23, 2010 9:24 am
by madmike
:?:

Re: Fuel/Air Mixture screws?

Posted: Fri Apr 23, 2010 9:37 am
by CMSMJ1
Have you looked at the plugs? have you a sooty pipe??!?!

does your choke actualyl work properly? What is the bike set at now? Is it standard? What airbox setup have you got..

more info required man... ;)

Re: Fuel/Air Mixture screws?

Posted: Fri Apr 23, 2010 10:50 am
by Wozza
Do the revs not pick up after a minute or two?

Re: Fuel/Air Mixture screws?

Posted: Fri Apr 23, 2010 9:50 pm
by madmike
The fuel/air mixture screws are set to the default setting from the haynes manual, I set them when I cleaned the carbs a while back, Airbox and stuff is standard, How do i know if the choke is working properly?

Cold start requires about quarter choke and then when it spins up rev it gently while i pull the choke out a little more until I've got it stable (1-1200rpm)

And the revs don't really change cause my warm idle is around 1400rpm

Re: Fuel/Air Mixture screws?

Posted: Mon Apr 26, 2010 6:45 pm
by madmike
:?