CBR 954RR 2002 - 2003 - CBR 954RR Forum

in dire need of technical assistance/troubleshooting...

  #1  
Old 06-26-2015, 07:05 PM
Registered Users
Thread Starter
Join Date: Jun 2015
Posts: 4
Default in dire need of technical assistance/troubleshooting...

Hey all. I've got an issue I'm trying to figure out but is completely puzzling me. I'll try to explain this as best as i can...

Bought my '03 954 a month ago from a coworker. 2 weeks after I bought it, I noticed the idle seemed to jump around a bit, and it ran rough as &^$. Lost significant power and sounded horrible, like a cruiser.

So here are the symptoms to the best of my ability to explain. I am mechanically capable, but not familiar with motorcycle specific systems.

Idle jumps between 1050-1200ish, and "lurches" or "surges" frequently. By that i mean that it sounds like it is being revved up during those surges, only the slightest amount. Bike is supposed to idle at 1200.

This happens whether the bike is cold start up or after reaching operating temp.

There is a distinct "clunky transmission" sound when it's idling, not continuous but frequent.

Driving in 1st/2nd gear it sounds like you are in 5th gear when you are in 2nd, like you're driving in the wrong gear and it's bogging down, and sounds like a cruiser. After 4k the bike runs smooth.

BUT, if I am in a higher RPM and still get on the throttle hard, the bike makes the same cruiser-like sound and the power is not near what it should be. Sounds terrible.

More interesting info:

After 2 weeks of when the problem started, my gauge cluster went out. Traced it to a blown fuse. Replaced the fuse, and the bike suddenly ran like a charm. Had full power, all gears were smooth through shifts and the bike literally ran perfect.

Didn't ride it for a week and it went back to the crappy performance. This happened 2 days now, and then suddenly on my way home from work today, in the middle of the ride it suddenly went smooth again.

I only have 55W HIDs and Two Brothers exhaust, as well as quick accel sprocket kit for aftermarket parts.

Before I go tossing parts at a problem i can't figure out, I'm hoping for some guidance from experienced riders/mechanics...

Thanks in advance for any help!
 
  #2  
Old 06-26-2015, 08:17 PM
74demon's Avatar
Administrator and MVN, March 2012/Oct 2013 ROTM
Join Date: Sep 2011
Location: socal 949/951
Posts: 8,010
Default

I'd start by looking at the harness and connections. A little bad connection or bad spot in a wire can make a bike do funny things. Pay close attention to places where the harness moves or is exposed to the elements. Also, look at the back of the ecm connector for burned wires.

The blown fuse is concerning. They just don't blow without reason very often. I am leaning to that being related to the bigger problem.

Does it have a power commander installed?
 
  #3  
Old 06-27-2015, 07:17 AM
zaqwert6's Avatar
Nov 2011 ROTM
Join Date: May 2010
Location: O-Town
Posts: 655
Default

Is it running on all cylinders when it's rough? It sounds to me like it might be dropping a cylinder. I'd start there first. Then if so, check plugs and ignition and work your way back.
 
  #4  
Old 06-30-2015, 03:51 PM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default in dire need of technical assistance/troubleshooting...

Originally Posted by zaqwert6 View Post
Is it running on all cylinders when it's rough? It sounds to me like it might be dropping a cylinder. I'd start there first. Then if so, check plugs and ignition and work your way back.
That's where I'm at with this too. I think you're misfiring. That'd cause the rough idle, the surging, and the sound.

Have you replaced the plugs or done anything whatsoever to the ignition?

IMO, the blown fuse is probably unrelated.
 
  #5  
Old 06-30-2015, 07:01 PM
Registered Users
Thread Starter
Join Date: Jun 2015
Posts: 4
Default

I am going to seafoam this thing tomorrow and get some new plugs and see what happens. Here is a video of my idle, and you can hear how rough it sounds when i blip the throttle. This may shed some more light. Thanks for all the help so far
 
  #6  
Old 06-30-2015, 07:23 PM
Registered Users
Thread Starter
Join Date: Jun 2015
Posts: 4
Default

Thanks for that advice. I'm going to run seafoam through her tomorrow through monday, and I got new NGK iridiums on order, should be in by Monday. I'll hope this works. I'll have her plastics off and stripped and looking for wire problems this weekend as well.

Here is a video I took at work, might shed some more light on the situation. The idles jumps a bit, and you can even feel it lurch in gear just slightly. The video sounds pretty accurate to how it sounds in real life, and you can hear how "grungy" it sounds when I blip the throttle. This was after I rode home, temp was at 198, so fully warmed up and a 20 minute ride.

 
  #7  
Old 06-30-2015, 07:26 PM
Registered Users
Thread Starter
Join Date: Jun 2015
Posts: 4
Default

Thanks for the advice. I will be pulling her plastics off this weekend and looking for any bad connections, rewiring the HIDs properly and anythig else I can check, like FPR while it's down.

Here is a video I took while I was at work, showing the idle lurch, and this also happens in the lower RPM band when I'm in gear. You can hear how "grungy" it sounds when I blip the throttle.

 
  #8  
Old 07-28-2015, 10:57 PM
Member
Join Date: Jul 2005
Location: SoCal, Atl, Pitt,...
Posts: 92
Default

I listened to the audio/video clip. Honestly I couldn't hear anything "wrong" with the engine or exhaust note....

Did you run seafoam through it anyway? any difference?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
donnygeewebb
F4i - Main Forum
9
04-03-2012 11:24 PM
adamw89_2000
F4i - Main Forum
0
07-23-2010 05:24 PM
honda f4
General Tech
3
01-27-2009 01:57 AM
bakesteak
CBR 600F2
2
07-29-2008 02:09 PM
tmyers7791
CBR 600RR
0
06-06-2008 10:56 PM


Thread Tools
Search this Thread
Quick Reply: in dire need of technical assistance/troubleshooting...


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.