04 R1 - 4500-5000rpm idle surges...?

[satyr36]

when cruising around 4500 rpm the bike feels like its surging / drowning in gas. I can nearly watch the idle fluctuate and the bike feels retarded...

It runs normal through that section when getting on the bike but just cruising its very noticable

any idears?

[xtremewlr]

Sounds like the normal dip in power between 4 and 5k. Velocity stacks like the Graves or Roth stacks should fix the problem. I have the Roth's in mine and am very pleased with them.

[satyr36]

hmm - could you possibly provide a link to them? any material to read on how this fixes the problem?

also, is it a fuel issue? could getting the bike tuned or pc3 work to "tune" thru it?

[xtremewlr]

http://www.r1-forum.com/forums/showthread.php?t=242753

[SHEPPO]

my bike did this at exactly the same thing when cruising along at 4500rpm. when i revved it up, through these revs and beyond whilst "getting on it", it was perfectly fine. Even a wide open throttle dyno run didn't show the problem, 'cause it was only at small amounts of throttle.

due to the bike having slip on's & a bmc air filter, it was running lean at, and around, 4500rpm. so i fitted a PC3 & got a custom tune, and the surging went away. the map i had done has 25% more fuel added at 4500rpm, at low throttle position (like you use when cruising).

if i was you, get it on the dyno and simulate small throttle cruising. my issues were at 2 & 5% throttle positions, between 4000-5000rpm.

[satyr36]

there is a PC3 hooked up from the previous owner... not sure if its working though. i think ill take a video of it and post it up..

when i watch the pc3, it goes through its little dance at the start up then all the lights go out until i give it gas, and it fluctuates showing movement... for some reason i thought it was suppose to start towards the middle or always have a few bars lit up?

[xtremewlr]

Originally Posted by satyr36

there is a PC3 hooked up from the previous owner... not sure if its working though. i think ill take a video of it and post it up..

when i watch the pc3, it goes through its little dance at the start up then all the lights go out until i give it gas, and it fluctuates showing movement... for some reason i thought it was suppose to start towards the middle or always have a few bars lit up?

Nope, what you described sounds normal.

[satyr36]

Originally Posted by xtremewlr

Nope, what you described sounds normal.

ya your right - i hooked it up to my laptop and it responded.. hmm.
now im on to this thread " http://www.r1-forum.com/forums/showt...03#post4563803 "

and my numbers are 16/94 which seem low compared to what was suggested in it...

I can get into the diag. mode OK but have no clue how to actually CHANGE the numbers

[satyr36]

ok - i think i found it under the airbox? but im going to hold off on messing with it as the dealer said my bike is under the TPS RECALL - so he ordered a new one