carb troubles...

[Bartjan]

2 days ago i took my carbs apart and cleaned them, because the bike had some trouble starting when cold (the motor not the weather)
and after that he wouldnt run normally  

he'll just rev really high, 11-12k

i opened them again and saw the large rings of the floater where not seated right so i tried to seat them proper.
it didnt help...

i tried starting with 1 sparkplug cable loose to locate the cilinder/carb that was malfunctioning. after trying it with the 2 outer cilinders i found that cilinder 4 was the problem.
so i opened the carb and replaced the large floater ring with a new one.
at first it helped and it rev'ed normally, but since i was testing i didnt have the air (pod) filters in place so it was very lean.
so after warming the bike up i figured i'd fit the filters and synchronize the carbs and be done with it...

but after i fitted the filters it rev'ed high (11-12k) again  

so i tried again with 3 cilinders to locate the problem cilinder/carb and now it was the 3rd cilinder/carb.
first i wanted to make sure there wasnt an air leak so i started it with only 1 coil working (it was only running on cilinder 2 and 3) so it didnt rev really high (just 10k   ) and sprayed some aerosol very flammable thingy on it.
but it didnt respond to it except when i aimed at the filters, so it seems there is no air leaks.

so i replaced all of the (the other 3) large floater o-rings but it didnt help anything  

now im starting to get really frustrated cos i alreaddy took them apart like 7-8 times and its not helping...

anybody got some ideas? it seems to be getting way to much gas (climbs up to 100kph/60mph without any throttle)

[gsxr400 racer]

get a whole rebuild kit or find some float needles

[gsxr400 racer]

also pull your cables off and lube them while lubing check for frays in cables including choke cable may also have a broken brass choke pipe

[Bartjan]

well....   getting a complete rebuild kit would be the best ofcourse, but soon (2 weeks) i'll receive some vvt carbs (which are the same as normal ones, but have throttle positioning sensor) for use with the vvt head, wiring loom and cdi i alreaddy have  

the cables are fine and nothing is stuck..  
i doubt if it is the choke pipe since with full choke it would rev to max 8k instead of 11-12k and when i replaced one o-ring it was fine for a very short while.

i'll check some things tomorrow:
- change the floaters from cilinders 3 and 4 to see if the problem stays or moves along.
- check floater height
- clean everything for the 10th time  

[gsxr400 racer]

wont you still want to rebuild the vv ones just to eliminate any potential problems?

[Bartjan]

i would, but i'm worried about my budget since i dont have a job yet  

what do those rebuild sets cost?

[gsxr400 racer]

75.00 shipped

[Bartjan]

after switching the floaters between carb 3 and 4 the problem magically disappeared  
in the mean time i also charged the battery but i doubt if that has anything to do with it, since it was full to start with

then when i tried to synchronize them i found out in the process i had blocked the synchronize-shafts so i couldnt check the vacuum of 3 of the carbs  

opened them up again, de-clogged them, put them back together again, synchronized them and now it idles better then ever before      

now lets just hope those VVT carbs dont have any problems...

[gsxr400 racer]

[Tainted-Meat]

what's the difference between teh variable valvecarbs and the none variable valved ?

i have a variable but i can't find any position sensor on it ? ? ? ? ? !!!!!! ? ? ? ?

[gsxr400 racer]

black round thing on side with tps wire coming out of it 33mm

[Tainted-Meat]

deffinatly not there, was it pre 2nd gen engines ?

[gsxr400 racer]

interesting thought all the new ones had it, may want to look for a manual or parts book for your bike

[Chris H]

Hi Tm and Jay, just been looking in my service data and i cannot see any sensor on the 400v (model V 97) pictures not to clear be defo not there! so carb choice if replacing on a VV model is a white elepant!

[Tainted-Meat]

i got sale on pink if you want



mind the blue mice are giving me hell