CBR 600F4 1999 - 2000 Honda CBR 600F4 Forum

engine starts bogging down at low throttle with HOT engine?

Thread Tools
 
Search this Thread
 
  #21  
Old 08-19-2009, 09:59 AM
pablohoney's Avatar
Senior Member
Join Date: May 2009
Location: San Bernardino, CA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

My bike just started doing the same thing. I am thinking that I have to adjust the pilot screw, but my manual said, "don't" that it is a major pain in the *******. Is it?
 
  #22  
Old 08-19-2009, 10:44 AM
johnnyx's Avatar
Senior Member
Join Date: Apr 2009
Location: Chicago, IL
Posts: 1,641
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by pablohoney
My bike just started doing the same thing. I am thinking that I have to adjust the pilot screw, but my manual said, "don't" that it is a major pain in the *******. Is it?

. . .Yes. Yes, it is.

Only adjust the pilot screw once you have completely eliminated all other possible causes of the problem. This situation can have a TON of causes, so you've got a long way to go before you start swearing at a pilot screw.
 
  #23  
Old 08-19-2009, 12:53 PM
Dissevered's Avatar
Senior Member
Join Date: Jul 2009
Location: Pittsburgh, PA
Posts: 769
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 98formulaLS1
ok so i've run into a question.

Does our pilot screws on the F4 control AIR or FUEL?
every adjustment on the carbs is for fuel. well I should say jetting wise. throttle plates are in the carbs and those control air
 
  #24  
Old 08-20-2009, 07:38 PM
pablohoney's Avatar
Senior Member
Join Date: May 2009
Location: San Bernardino, CA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

Well, I pulled my carbs out yesterday, prior to reading johnnyx's post and cursed at the screws for awhile, then set them to factory settings which is 2.5 turns and it runs amazingly. No complaints! Thanks.
 
  #25  
Old 08-20-2009, 11:22 PM
BGm6er88's Avatar
Junior Member
Join Date: Jul 2008
Location:
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
Default

This is a very common problem and Im surprised that after 3 pages no one has sugggested that, when the bike is hot, the fan is drawing alot of the bikes electrical power and thus having a weak spark until the bike starts charging at about 4k RPM.

https://cbrforum.com/forum/showpost....4&postcount=16
 
  #26  
Old 08-21-2009, 09:08 AM
johnnyx's Avatar
Senior Member
Join Date: Apr 2009
Location: Chicago, IL
Posts: 1,641
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by BGm6er88
This is a very common problem and Im surprised that after 3 pages no one has sugggested that, when the bike is hot, the fan is drawing alot of the bikes electrical power and thus having a weak spark until the bike starts charging at about 4k RPM.

https://cbrforum.com/forum/showpost....4&postcount=16

That's an R/R problem. The R/R exists precisely to prevent that situation. If it's occurring, the R/R needs to be replaced.
 
  #27  
Old 08-21-2009, 03:22 PM
pablohoney's Avatar
Senior Member
Join Date: May 2009
Location: San Bernardino, CA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

Well, I was wrong, after about 20 minutes of riding it started it again. My dad said a vacuum tube leak. Your thoughts?
 
  #28  
Old 08-21-2009, 03:25 PM
johnnyx's Avatar
Senior Member
Join Date: Apr 2009
Location: Chicago, IL
Posts: 1,641
Likes: 0
Received 0 Likes on 0 Posts
Default

Pulse generator. Common thing to fail on warm up. Just my two cents.
 
  #29  
Old 08-21-2009, 03:48 PM
pablohoney's Avatar
Senior Member
Join Date: May 2009
Location: San Bernardino, CA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

Well, it started happening right after I cleaned my carbs, so think that it is too rich. I just don't know why.
 
  #30  
Old 08-21-2009, 04:26 PM
johnnyx's Avatar
Senior Member
Join Date: Apr 2009
Location: Chicago, IL
Posts: 1,641
Likes: 0
Received 0 Likes on 0 Posts
Default

OH, well ****. Did you remember to balance them? I will bet you a dollar and some ice cream that that's it if you didn't.



Edit: HEY, waitaminute. I remember this thread. WTF is going on here? This is starting to look like one of MY threads.
 


Quick Reply: engine starts bogging down at low throttle with HOT engine?



All times are GMT -5. The time now is 10:59 PM.