throttle body balance??

[Skidmarx]

hi guys, wondering if throttle boddys going out of balance is an issue with the gen 1's? im not 100% sure that this is the problem, but its acting very similer to an old cbr i had before balancing the carbs, i have a guage at work so i may see if i get a chance and throw it on anyway

basicly over the last couple of months the problem has been getting worse, it has a jumpy idle, almost sounds like its got a big cam in it, couple of the blokes at work call it the rotary busa because the idle bounces around so much lol, also the response has been getting worse, pig roots under 4 grand, and at idle i get clutch basket chatter (wich is what led me to believe the throttle bodys are out of balance) still waiting to send them ecu to pete for a tune up, but the bike is now my daily so that plan is on the back burner for a while, now the reason i ask if this is a comon problem, is the bike still has under 16000k's on it, it has been dropped hard but i wouldnt imagine that this would have effected something like this

any help greatly appreciated :)

cheers, ash

[Bill Gaheer]

Grapevine is that Big Kev tried this and had issues with bike. Would recommend talking to him.

[03busa]

i balanced mine over the years and yes made a big difference
Cheers

[Maj]

Check the vacuum lines to the map sensor on the back of the airbox, if there old and cracking it would do this

Throttlebody balance should only be done after shim clearance check, no point adjusting a throttlebody to compensate for another issue

[GRUNTMAX]

Gen2 ?
http://www.mototechdiagnostics.com.au/bi...%20isc.php

[fasterfaster]

Grunt that unit will hold the ICS solenoid so an accurate balance can be done, but it won't reset the base ICS setting which is a must after adjustment is made. So you can still end up with erratic idle and F1 light on as ECU fights to recognise new unknown readings it finds after procedure.

[GRUNTMAX]

Grunt that unit will hold the ICS solenoid so an accurate balance can be done, but it won't reset the base ICS setting which is a must after adjustment is made. So you can still end up with erratic idle and F1 light on as ECU fights to recognise new unknown readings it finds after procedure.

Leave it plugged in ?

[GRUNTMAX]

1350 idle set ? mmmmmm......or, adjust the screw (17) you are not supposed to adjust ?
   

Then calibrate TPS ?
   

.....then who knows, maybe the synchronising gadget can be disconnected.

[Maj]

ECU is reading the tps voltage and knows x rpm is its target , and y voltage will be at x rpm, or very close to
when you change anything this relationship of x to y is changed and the ecu hunts to try and get it right, and puts up a FI code if its far enough out .
ECU Editor can turn off the warning if you want to take manual control
or the suzuki sds tool can reset the tps /idlespeed

[GRUNTMAX]

I wonder when the warning appears exactly ?
Says the upper limit is 2000rpm.
Synchronisation;
hmmmmmm....on "Schedualed Maintainence", only has USA (E-33) only marked at 1000km.
Why is it so ?
Also noticed, EVAP system purge control solenoid valve resistance is 32 Ohm (E-33) only & 20 - 24 Ohm on other. I've got a Boost By Smith resistor plugged in.
TP Sensor output voltage Closed: Approx. 1.1 V , Opened: 4.3 V.
IAP Sensor output voltage: Approx. 2.7V at idle speed.
Idle RPM 1,150 + or - 100rpm

Thanks. Yes, I've seen that box to switch off ICS Valve in ECU Editor.
Maybe can be reset manually though with screw #17 without setting off the warning code, but to what extra rpm?
   
   
   
   
   
Maybe someone could work out a plug in resister too fool the ICS for big bore strokers ?

---

.....or, reset position of Throttle Position Sensor so it puts out 1.1 V at required idle rpm

[GRUNTMAX]

x & y ?

[Maj]

You will have to try it and see
i think the easiest will be just turn it off and set it like a gen 1
seen some in the US put the 99 remote adjuster on , bit easier to adjust

[GRUNTMAX]

So much for those "factory settings"

.....Gen2...1580 no problem. TPS--anticlockwise 0.8mm. Throttle stop gap from 6.7 to 7.7mm.
Idle smooth @ 1270 to 1310rpm --395/378

[06BUSA]

Were you guys talking English?? Way over my head! Lol

[Madmax]

Lovely weather we're having! lol