CBR 600F 1987 - 1990 CBR 600F Forum

engine bogging under 5000RPM

Thread Tools
 
Search this Thread
 
Old Feb 8, 2009 | 11:16 PM
  #1  
caneridah's Avatar
Thread Starter
|
Junior Member
Joined: Jan 2009
Posts: 2
Likes: 0
Cool engine bogging under 5000RPM

Hey guys maybe someone can help me with my newest problem? I just bought an 87 hurricane 600 and when i opened it up the engine would not turn out more than 8 or 9K RPM without bogging. So I cleaned the carbs and installed larger jets (i went from #92 jets to #120 jets) and now the bike bogs upon acceleration under 5K RPM. Is there anyway to get the fuel/air mixture correct on these old beasts? or is there something else i need to do after installing larger jets?
 
Reply
Old Feb 9, 2009 | 09:29 AM
  #2  
tds94probe's Avatar
Senior Member
Joined: Oct 2007
Posts: 832
Likes: 1
From: Ontario, Canada
Default

odds are youre way too rich. When installing a larger main jet you need to add more air as well. (K&N and Airbox Mod)

You need to pull the carbs out again.

WHen you cleaned them did you actually take the float needle seat out? They have a filter on them that needs to be cleaned on each carb.

Did you set your float height? That controls your mix below 5000 rpm, should be set at 7-8mm (says 8 in the manual)

Fuel Mixture screws need to be set at 2.5 turns out.

Make sure your pilot jet isn't clogged.

Hope this helps.
 
Reply
Old Feb 9, 2009 | 05:52 PM
  #3  
caneridah's Avatar
Thread Starter
|
Junior Member
Joined: Jan 2009
Posts: 2
Likes: 0
Default

That does help a lot that gives me a few more options to play with. I already have a k&n filter and drilled airbox. Thanks for your reply I'll see if that works.
 
Reply
Old Feb 10, 2009 | 11:40 AM
  #4  
tds94probe's Avatar
Senior Member
Joined: Oct 2007
Posts: 832
Likes: 1
From: Ontario, Canada
Default

hey no problem, one thing you will know like the back of your hand is taking the carbs out of this bike. Its a common thing to have to pull them at least once a year.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mick54683
CBR 600F4
9
Jul 27, 2011 09:50 PM
IronCityGuy
CBR 600F3
6
Jul 7, 2010 04:04 PM
98formulaLS1
CBR 600F4
31
Aug 24, 2009 10:04 AM
bakesteak
CBR 900RR
12
Jun 7, 2009 11:22 AM
ZYZX 900RR
General Tech
4
Aug 23, 2005 12:37 AM




All times are GMT -5. The time now is 11:43 AM.