So I picked up a '04 GSXR600 not too long ago. Bike has PCIII, head work, suspension stuff, blah blah blah.

Now to the problem... at 5k rpm theres a major stumble. It feels like its cutting out (feels kind of like a fuel cutoff). The hesitation only happens at 5k rpm and only at light to mid throttle. Doesnt happen when I get on it. Also, it seems to happen more when the bike is warm.

I'm thinking it's a mapping problem or a PCIII problem. I'm going to disconnect the PCIII to see if it goes away. Any thing else I should check?

 

I would say check the connections to and the condition of the TPS as well as the PC. It sounds like you are on it though.

 

does it feel like your bouncing on and off the throttle? like your gassing it then letting it go and gassing it and letting it go again?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sakums20 &raquo;</TD></TR><TR><TD CLASS="quote">does it feel like your bouncing on and off the throttle? like your gassing it then letting it go and gassing it and letting it go again?</TD></TR></TABLE>

yah

 

i got the same problem, with my 05 r6 havent figured it out yet.

 

I would say something with the PC too but i can't say for sure...sakums20 i don't know if he has PC or not, either way guys let us know if you solve the problem cause im intrested in knowing what the deal was.

 

Will let you guys know if the PCIII is the problem or not (when I get off my lazy *** to figure out how to disconnect it.....I hate school)

 

come over to my place i'll take it off your hands and fix it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by immortal &raquo;</TD></TR><TR><TD CLASS="quote">come over to my place i'll take it off your hands and fix it </TD></TR></TABLE>

haha! good one...I can give you the pcIII instead of the penske shock if you'd like

 

friend of mine has an 01 Gix 6 and he noticed that very same problem after he put on a slipon. You didn't say if you had a slip or not, but with the head work, you may be getting the same problem.

To fix it, he had to get a PCIII & and a custom map, as all of the downloaded maps didn't fix the problem. The wielly co (spelling) map came close in that area, but it didn't completly fix it. It is a map related problem.

 

mapping is my #1 suspect at the moment....it was mapped for the track

 

my vote goes to it being a map problem

 

mapping problem it is!

Just disconnected the PCIII and went for a ride. The hesitation is gone, so is the flat spot (dont want to go past 7krpm since that wasnt a problem and its probably running lean has hell). Time to go schedule a appt with the dynoman

 

Good to hear that it was something relativly simple...now maybe you can get some more oomph outa here Dyno's are cheap here, $29.99 a hour...well tahts cheap to me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gixxerfiend &raquo;</TD></TR><TR><TD CLASS="quote">Good to hear that it was something relativly simple...now maybe you can get some more oomph outa here Dyno's are cheap here, $29.99 a hour...well tahts cheap to me </TD></TR></TABLE>

The bike already has a custom map but I guess they did a crappy job of it. Got it dyno'd at 102.1hp, 43.7tq. In referance, a stock gsxr600 pulled about 96hp that day

Oh, dyno runs are cheap but custom maps are $$ (about $250)