Rebuild kit for GSX750ES 1985 Carbs

[dpascal]

I started the rebuild of my GSX750ES 1985 Carbs.
I plan to clean everything thoroughly using a dedicated carb spray and replace all seals/gaskets.
1. Is there a guide (preferably video) for doing that to the quadruple Mikuni 32 ?
2. There are carb rebuild kits on ebay for some carburetors but I wasn't able to find one for my bike.
Just ordering all the seals from the catalog can be very expensive I guess...
http://www.alpha-sports.com/suzuki_parts.htm?fpg=/spst/1983 GS750ES/05.htm

 

[Nessism]

http://zeus.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

 

[dpascal]

http://zeus.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

WOW. That's a Mikuni Bible ! Thanks!

 

[dpascal]

I want to purchase the following carb parts for GSX750ES/GS750ES 1983-1985 :
- 4 x Mikuni pilot jets
- 4 x Mikuni float seats
- 4 x Mikuni float needles
- 4 x Mikuni main Jet brass washers
- 4 x Mikuni pilot jet plugs
- 4 x Mikuni main jets

Genuine Suzuki parts are very expensive and Mikuni branded parts are somehow much cheaper. I don't want to buy these low quality Chinese kits so I'm looking for Mikunis if possible.
I think I was able to find the pilot jet (Suzuki Carburetor drawing specifies .JET, PILOT (37.5) ) but not the other ones...
http://www.ebay.com/itm/Genuine-Mikuni-Pilot-Jet-CV-Carburetor-BS30-96-Size-37-5-/151526486904?hash=item2347aeb378:g:3rUAAOSwyZ5Umgtj&vxp=mt
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Any idea of genuine Mikuni kits for GSX750ES/GS750ES 1983-1985 carbs or references for the Mikuni part numbers ?

 

[dpascal]

Here are the the specs for the 1983 GS750ES/GS700ES carbs (found in this thread that contains carbs specs for old Suzuki bikes http://www.thegsresources.com/_forum/archive/index.php/t-73723.html):

*****************1983 and up GS750E************1985 GS700E
Type******************BS32SS*********************S ame
ID No.*****************31300******************06A00 (06A10 CA)
Bore*******************32mm*********************Sa me
Idle rpm************1150 +/- 50 rpm*****************Same
Fuel level*********5.0 +/- .5mm or .20 +/- .02 in**********Same
Float height*******22.4 +/- 1mm or .88 +/- .04 in**********Same
Main jet****************#117.5******************#122.5
Main air jet**********1.7mm (0.07 in)****************Same
Jet needle**************5D-12*********************5C-28
Needle jet**************Y-6************************Y-5
Pilot jet************** #37.5*********************Same
By pass*************0.8mm (.03 in)*******************Same
Pilot Outlet***********0.7mm (.03 in)*********************Same
Valve seat************2mm (.08 in)********************Same
Starter jet**************#45**************************Same
Pilot screw************Pre-set*************************Same

 

[JTGS850GL]

Just curious as to why you're wanting to buy all new jets? Are you rejetting for some reason or are you just wanting to replace them with new? You do know that the original jets that came in the carbs were as good as you can get. They just need to be cleaned along with the rest of the carbs.

 

[Guest]

Yes as said above the only thing you should need new is a Robert Barr o-ring set

 

[dpascal]

Where I come from (Israel) a vintage motorcycle will usually have more than a 100,000 kilometers on it (mine has 129,000km) and usually has a history of very poor maintenance.
I spent close to 10K$ on restoring my GSX750ES and it is actually better than new now. Just to give you a feeling of how neglected and badly maintained the bike was here is a picture of the jets as I removed them. This is how I found them. No damage from my side...

 

[JTGS850GL]

This is how I found them. No damage from my side...

View attachment 45557

Um??? You mean that pilot jet came with a screw extractor inside? Seriously, it does look like you will need new jets. At least new pilot jets. What do the pilot air and needle jets look like? One of the main jets looks like it left some threads in the carb body.

 

[dpascal]

I swear the pilot jet came with a screw extractor inside. That explains the knocks in high RPM ... Seriously ,everything looks like ****.
Here's something that I doubt if anyone had the chance to see in the US : A completely blocked exhaust valve passage. It was blocked not by carbon but by something the resembles china and is just as hard as china. Probably the product of bad fuel. I had to gently break it with a hammer and screwdriver. Note the healthy passage next to it for comparison

.

 

[JTGS850GL]

Now that's amazing! Never seen one completely blocked like that.