Rejetting - #4 washer question

[franke3c]

I have been trying to rejet my GS,

I wasn't sure where to get a #4 washer from so i went to home depot and picked one up from their hardware dept.

Upon closer inspection i foudn that the washer is a little bit wider than the white donut and lock washer..?
It seems like this wider diameter washer is interferring on how the needle will sit in the diaphram.

Has anyone used these washers' before?

thanks for your help everyone

[Ed_in_Az]

I bought 4 #4 brass washers at ACE Hardware. Put two on each needle. They fit perfect and the bike runs way smoother.

[Hi-T]

There are a couple different types of measurements- one is a #4 and the other is a 4mm.  the 4mm is too large... and sometimes the #4 can be too large too.  Don't force it.  Mine was just BARLEY bigger and when I tried to press it in, the piston valve broke (45 bones to replace).  take the needle and stock washer with you to a hardware store and make sure it fits.

[Rema1000]

one is a #4 and the other is a 4mm.  the 4mm is too large

!@#$.  I just went the my trusty know-it-all HW store and asked for "#4" washers, and they sent me home with 4mm washers.  Oh, well.  Not a big problem.  But if the #4 washers are for SAE 4-40 machine screws, then I wonder what our friends in UK and Aus. do to shim needles?

[The Buddha]

Lowes has them... #4's... I however use #2 for GS and #4 for my eli's. Just thinner and smaller those #2's... need more for same thickness but better control of thickness. Honestly using 2 #4's... you are better off going up 1 main jet.
Cool.
Srinath.

[franke3c]

Lowes has them... #4's... I however use #2 for GS and #4 for my eli's. Just thinner and smaller those #2's... need more for same thickness but better control of thickness. Honestly using 2 #4's... you are better off going up 1 main jet.
Cool.
Srinath.

oh great.. now you say so =P

I found some #2 lock washers.. i just flattend them out...
hah

[Rema1000]

I bought 4 #4 brass washers at ACE Hardware.

Does anyone know how the #4 washers compare to the U.K. GS's clip settings?  If it's close to one #4 per clip notch, then the #2 washers would give finer tuning than you can get on the UK bike.

Honestly using 2 #4's... you are better off going up 1 main jet.

I thought that most of the difference in between 1/4 and 3/4 throttle comes from changing the needle?  The main jet does kick-in at half-throttle, but if you enlarge the main jet to give best performance from 1/2 to 3/4 throttle, then won't it be too rich and bog-down at full throttle?

[The Buddha]

OK that is pretty much true... The diffrence is that... the needle will affect the mix depending on its taper... and the taper isn't really linear... Lifting the needle will richen the entire range... 0 to full... however its effect at full throttle will be more than the effect at idle. It is to be controlled by the needle is different from it doesn't do anything... in other words... If you have idle issues... tweak the air screw... OK fine you tweak the thing... and set it to 5+ turns out and you still lean... You are out of adjustment there... opening it more will only result in it falling off somewhere... so you go up a pilot or something and compensate by lowering float level or somehting... The range of adjustments and area of control is what its all about... You can adjust the mains to make the low end richer, or put in bigger pilots to richen the top... the side effects of both are less than ideal. The idea is to keep most of the parameters where they are working right and keep it all in useable range...So 4 #4 washers ... for a 4 mm lift of the needle is pretty much so drastic... I'd say you have messed something in the carbs. Mains too small or float too low or some like that needs looking at. Stay within useable ranges for each of the adjustments so as to have the right effect on each adjustment. UK clip sizes I believe are 1mm apart and they set them in the middle... or 2nd from top if I remember... and they have 40 pilots and 125 mains... so they may set them leaner a little on the needle.
Cool.
Srinath.