CBR 900RR 1993 - 1999 Honda CBR 900RR

1998 cbr900rr jet question

Thread Tools
 
Search this Thread
 
Old Aug 9, 2012 | 09:53 PM
  #1  
900SF's Avatar
Thread Starter
|
Junior Member
Joined: Aug 2012
Posts: 12
Likes: 0
Default 1998 cbr900rr jet question

Hey all, I have above mentioned bike with super short exhaust, oem airfilter and plugs, at higher rpm I miss power when first touching gas, can I adjust the jets and needles I have in there? Carbs are super clean and adjusted. I just try to save money and not buy a kit for +$100' any help is appreciated
 
Reply
Old Aug 10, 2012 | 11:37 AM
  #2  
zaqwert6's Avatar
Nov 2011 ROTM
Joined: May 2010
Posts: 655
Likes: 0
From: O-Town
Default

Be more specific about exactly what happens?

FWIW, a 'super short' or heavily modified exhaust will generally create flat spots and anomalies and than can not be jetted out.
 
Reply
Old Aug 13, 2012 | 12:36 AM
  #3  
900SF's Avatar
Thread Starter
|
Junior Member
Joined: Aug 2012
Posts: 12
Likes: 0
Default

At speeds over about 45 mph. If. I. Hit the gas it hesitates and sputters in all gears until I hit a certain. Rpm then it does ok. That is why I'm thinking that I may need bigger pilot jet.?
 
Reply
Old Aug 13, 2012 | 10:39 AM
  #4  
zaqwert6's Avatar
Nov 2011 ROTM
Joined: May 2010
Posts: 655
Likes: 0
From: O-Town
Default

Hard to tell by that (not being here myself) , could be rich too.

Hold the rpms right at that point where it is acting up like that and then hit the kill switch. Pull a spark plug and read it. That's will give you the firing condition at that exact point in the range. Then you should have an answer.

At that range, it would most liklely be a needle adjustment.
 

Last edited by zaqwert6; Aug 13, 2012 at 10:52 AM.
Reply
Old Aug 14, 2012 | 12:13 AM
  #5  
900SF's Avatar
Thread Starter
|
Junior Member
Joined: Aug 2012
Posts: 12
Likes: 0
Default

I don't understand " read the plug". Do ou mean the coloring on them? I just put new plugs in there, if I remember correct the old once had like a white color
 
Reply
Old Aug 14, 2012 | 08:55 AM
  #6  
zaqwert6's Avatar
Nov 2011 ROTM
Joined: May 2010
Posts: 655
Likes: 0
From: O-Town
Default

Yea, the coloring.

If you shut it off exactly at the point of the problem, the fuel burn condition will be captured on the plug.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wellmantodd1
900 & + Modifications
1
Mar 7, 2013 12:36 AM
wellmantodd1
CBR 900RR
2
Jan 29, 2013 05:18 PM
98bladerr
New Member Area
3
Jul 22, 2012 08:18 PM




All times are GMT -5. The time now is 11:05 AM.