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flat spot in power on 83gs550es

  • Thread starter Thread starter reem98
  • Start date Start date
On the 1150 the inner carbs are 2.5 richer 122.5 vs. 120 for 1 & 4, so maybe bring down those inners to 105 and see what happens.

Nerobro, thanks for clarifying jet sizes between Dyno and stock. i'm currently in possesion of jets from 92.5-160.

Again it could be the flat spot the header makes somewhere in the rev range.

Just today I changed my pilot jets back to stock after many years believing the guy at Aurora Suzuki saying "trust me you need to go up on the pilots" to find I eliminated most of a stumble I have at 3000 rpms or minute throttle openings.
 
reem98 said:
Ok heres what I have found I took out the DJ 98's (dynojets) on the mains, cause around 7k it would sputter bad
I put in 102.5 outers and 107.5 inner mains. not it had power up to redline but sputtered alittle around 6-7k so I dropped the needle from 5 to position 3. Well it got really bad had no pickup (way to rich) I went to positon 6 it lost the sputter but didn't have good power up around 10k. So I went between 5 and 6 on the needles it has alittle sputter around 6-7 and decent power up to redline.
Can someone please explain how I can get rid of the mid sputter and still have good top end.
Thanks
Click to expand...
You've kind of lost me with the above description.
You "dropped the needle from 5 to 3.....it got really bad, way to rich".(?) Dropping the needle 2 positions would lean it out quite a bit, unless it was super rich at the initial position to begin with. What position are the e-clips at now (from the top of the jet needles?) What "base settings" did the jet kit suggest for the e-clips?
You need to give throttle positions to describe performance, not rpm's. Too confusing.
You then need to give us plug reads at specific throttle positions. 1/3, full throttle positions and then minimal throttle openings. Tape and mark your throttle housing/grip, chop off and read.
Just to re-cap this thread, you have a stage 1 kit, a 4-1 pipe and a K&N filter in a stock airbox WITH the lid still on, correct?
What jets sizes/parts come with your kit? Have you positively determined what size mains, etc, your bike uses as stock? Trying to re-read this thread and it sounds like there's some confusion here.
I read a ways back that you had a question about re-using the factory plastic spacer(s) that come in the jet needle assembly. Yes, you must re-install in exact order, the factory spacer(s) with the new jet kit needles. Did you?
Also, have you prepared the bike for re-jetting? Good compression...valve clearances good...ignition timing correct...good blue/white spark...K&N filter oiled correctly... airbox seals good...petcock/fuel flow good...carbs clean....floats adjusted...vacuum synched...mixture screws set for best idle...new gaskets for the new pipe...?
 
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