CBR 600F3 1995 - 1998 CBR 600F3 Forum

starting and choke...

Thread Tools
 
Search this Thread
 
Old Oct 30, 2008 | 10:04 PM
  #1  
f3BikeR's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2008
Posts: 432
Likes: 0
From:
Default starting and choke...

I'm a new owner of this '95 f3 and being that the temperatures have beenaround 32º-50ºlately, I've had some hesitation from the bike starting up.

The battery has been on the trickle charger through the nights and the battery terminals have been cleaned up nice. Even so, the bike seems to start on the 6th+ attempt.

Now I don't really know how the choke lever is to be used. I've tried bringing it down and up a few times before the 1st attempt, aftera few attemps andI've also triedleaving it down all the way during ignition...

It only seems as if highering the idle, via turning the **** adjustment clockwise, helps to start the bike over.

I would like to know the most desirable way to use the choke and not have to touch the idle adjustment.

BTW, idk if it makes a difference, but I keep the petcock to "off" during the night and switch it to "on" right before I try to fire up the bike.
 
Reply
Old Oct 30, 2008 | 10:14 PM
  #2  
chrisc321's Avatar
Joined: Sep 2008
Posts: 64
Likes: 0
From: Las Vegas
Default RE: starting and choke...

Leave the petcock on unless you are working on the fuel system, storing the bike, or need to switch to reserve. put the choke all the way down and leave it. Start the bike. It should idle a bit high with the choke on. Once it is warmed up a bit, move the choke lever up.
 
Reply
Old Oct 30, 2008 | 10:27 PM
  #3  
f3BikeR's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2008
Posts: 432
Likes: 0
From:
Default RE: starting and choke...

ORIGINAL: chrisc321

Leave the petcock on unless you are working on the fuel system, storing the bike, or need to switch to reserve. put the choke all the way down and leave it. Start the bike. It should idle a bit high with the choke on. Once it is warmed up a bit, move the choke lever up.
Okay, so has it not been firing up right away because the petcock was set to 'off' all night? I've had the choke lever all the way down and it doesnt start with it like that until a few tries...

Once it starts, it doesnt have a single bit of trouble idling without the choke lever down. In fact, down or up doesn't change the idle speed at all.
 
Reply
Old Oct 31, 2008 | 01:58 PM
  #4  
chrisc321's Avatar
Joined: Sep 2008
Posts: 64
Likes: 0
From: Las Vegas
Default RE: starting and choke...

Having the petcock off all night shouldn't have an effect, I dont think, unless you run all of the fuel out of the float bowls each night. If you do that, It may take a few seconds for the fuel to refill the float bowls in the morning, causing a delay in starting. Try leaving your petcock on all night, and start it with the choke in the morning. Also, what happens if you open the throttle toa bitpast 25% while cranking the engine over?

It is interesting that the idle speed doesn't change when you actuate the choke lever... My bike always seems to raise the idle 500 or so rpm with the choke on (motor cold). I have never engaged the choke with the motor idling while warm before so I cannot tell you what would happen in that circumstance.

Can you feel resistance when moving the choke lever? Does it feel like maybe it is not hooked up on the carb side? Just a stab in the dark, as I have never even seen how the choke cable attaches to the carbs...
 
Reply
Old Oct 31, 2008 | 08:58 PM
  #5  
f3BikeR's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2008
Posts: 432
Likes: 0
From:
Default RE: starting and choke...

ORIGINAL: chrisc321

Having the petcock off all night shouldn't have an effect, I dont think, unless you run all of the fuel out of the float bowls each night. If you do that, It may take a few seconds for the fuel to refill the float bowls in the morning, causing a delay in starting. Try leaving your petcock on all night, and start it with the choke in the morning. Also, what happens if you open the throttle toa bitpast 25% while cranking the engine over?

It is interesting that the idle speed doesn't change when you actuate the choke lever... My bike always seems to raise the idle 500 or so rpm with the choke on (motor cold). I have never engaged the choke with the motor idling while warm before so I cannot tell you what would happen in that circumstance.

Can you feel resistance when moving the choke lever? Does it feel like maybe it is not hooked up on the carb side? Just a stab in the dark, as I have never even seen how the choke cable attaches to the carbs...
This morning was just as rough with start up. I had the petcock at "on" all night this time.
I've tried every percentage of throttle at start up and nothing.
When I push the choke lever down, I can know it's doing something because I can hear a sound like fuel is squirting into somethingas a result of it.

I have a gut feeling that this is spark related now. I can smell fuel after "priming" the choke as the motor turns over. I wanna pull the spark plugs out and check them over. Only thing is, I am familiar with the 5/8' socket that is used to pull spark plugs out of a car and not sure which is to be used for bike plugs. Also, is it just a matter of pulling of the side access panels on both side and reaching at them from there?
 
Reply
Old Oct 31, 2008 | 11:34 PM
  #6  
bigjohnstud4200's Avatar
Joined: Oct 2008
Posts: 194
Likes: 0
From:
Default RE: starting and choke...

ORIGINAL: f3BikeR

ORIGINAL: chrisc321

Having the petcock off all night shouldn't have an effect, I dont think, unless you run all of the fuel out of the float bowls each night. If you do that, It may take a few seconds for the fuel to refill the float bowls in the morning, causing a delay in starting. Try leaving your petcock on all night, and start it with the choke in the morning. Also, what happens if you open the throttle toa bitpast 25% while cranking the engine over?

It is interesting that the idle speed doesn't change when you actuate the choke lever... My bike always seems to raise the idle 500 or so rpm with the choke on (motor cold). I have never engaged the choke with the motor idling while warm before so I cannot tell you what would happen in that circumstance.

Can you feel resistance when moving the choke lever? Does it feel like maybe it is not hooked up on the carb side? Just a stab in the dark, as I have never even seen how the choke cable attaches to the carbs...
This morning was just as rough with start up. I had the petcock at "on" all night this time.
I've tried every percentage of throttle at start up and nothing.
When I push the choke lever down, I can know it's doing something because I can hear a sound like fuel is squirting into somethingas a result of it.

I have a gut feeling that this is spark related now. I can smell fuel after "priming" the choke as the motor turns over. I wanna pull the spark plugs out and check them over. Only thing is, I am familiar with the 5/8' socket that is used to pull spark plugs out of a car and not sure which is to be used for bike plugs. Also, is it just a matter of pulling of the side access panels on both side and reaching at them from there?
I don't think you can to the plugs from the right access panel, only the left. I've only done it once and my bike had ALL the fairings off. As far as the size, I can't remember the exact size, but it was the smaller of the two major sizes for spark plug sockets.

Oh yeah, I'm not sure that the choke squirts any fuel, I think it just let's more fuel in, but I'm not sure.
 
Reply
Old Nov 1, 2008 | 11:56 PM
  #7  
f3BikeR's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2008
Posts: 432
Likes: 0
From:
Default RE: starting and choke...

I have just finished taking the spark plugs out and I was happy about 2 things:
1. that bike plugs use the same 5/8' socket as with car plugs
2. to see that all sparks had good color and no wear. I did gap all 4 of them to .035' evenly, being that they ranged from .029-.033' (all were same NGK-R).

I adjusted the choke cable under the gas tank and BAM!!...that was the problem. Before, the choke lever wasn't doing much, but on a quick test start, it did exactly as was mentioned- idle the bike 500RPMs higher than when it's warm!

thanks for the help everyone!
 
Reply
Old Nov 2, 2008 | 08:13 AM
  #8  
chrisc321's Avatar
Joined: Sep 2008
Posts: 64
Likes: 0
From: Las Vegas
Default RE: starting and choke...

Sweet! Glad to hear you found the problem! Nice job!!
 
Reply
Old Nov 2, 2008 | 08:47 AM
  #9  
redzintimidator's Avatar
Senior Member
Joined: Aug 2007
Posts: 2,950
Likes: 0
From: Greene, NY
Default RE: starting and choke...

yea that choke cable is strange..it doesnt do much for like half of its travel...glad to hear it works now!! get out there and freeze your **** off with me(its 31 here now)
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ohiojc
General Tech
9
Dec 8, 2016 08:11 AM
mbrown22
CBR 600F4
3
Nov 23, 2010 10:37 AM
d.r.
CBR 600F4
1
Nov 23, 2009 06:31 PM
jpanside@gmail.com
General Tech
7
May 25, 2009 10:05 AM
busyychild
CBR 600F3
1
Jul 27, 2007 03:27 PM




All times are GMT -5. The time now is 04:26 PM.