New Member - GS750

[afraziaaaa]

4 - carb/intake boots should mean:
Rebuild carb
New needles and seats
Float adjustment
Dismantle and Chem dip or ultrasonic clean carbs
New carb o-ring kit (each carb - pilot air screw, pilot fuel screw, choke plunger, fuel bowl drain screw)
Fuel bowl and top cover gaskets
New intake boot o-rings
Inspect intake boots
Reassemble and bench syncronize carbs
Fuel screws (on bottom) around 7/8 to 1 turn out. Too far and you'll never get a good idle or off-idle transition. Adjust air screws (on side) to the highest idle method.

You just use a standard strobe timing light for the ignition, but a fresh set of points and condensers is probably warranted.
Dyna-S ignition is $115-120 depending on which brand ignition advance yours uses. You really should do the ignition coil relay mod (all bikes of all makes without one) if installing electronic ignition.

I also always like to replace the stock plug wire resistor caps with new NGK 5000 ohm pieces. And new NGK B8ES spark plugs.
I'll have to dig up the part numbers, I've got them home on the shelves deeply stocked for future bikes. 2 angled, 2 straight. There are several variants of the angled type. It's the medium sized ones for the outside cylinders I believe.
Cut the plug wires back a little bit, 1/4" or so, if you can. Gets you a good fresh connection for the stab-in thread-in type connection.

Carb WILL need serviced. That should almost be #1 on the list really. Tie with valve adjust.

Duly noted, thanks again. Looks like there's no delaying it!

[Chuck78]

You will be so much better off, and any older bike of unknown carb condition that's not running properly, to just rebuild the carbs right off the bat, as well as valve adjustment

EDIT - I forgot to mention the fuel tube o-rings that connect the carbs, IF you are lucky enough to have the all-alloy type with replaceable o-rings, vs the type coated with a permanent viton/neoprene o-ring sleeve which are often just worn out & will no longer seal. Z1 Enterprises sells reproductions of these if you search for VM26/VM28 carb parts in their database. Not all are listed for Suzuki GS750/850/1000, but they list dimensions and also KZ1000/Z1/KZ900 VM's are identical.

[hannibal]

Welcome from another GS750 first timer.

[afraziaaaa]

Good to know. I will look out for that when I pull the carbs. While on the bike, the carbs look very clean.

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[afraziaaaa]

I believe I have nippondenso points setup.

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[Himble]

The NGK plug caps you need are 2 x XB05F and 2 x VB05F.
Just purchased a set for my 750EC!

[afraziaaaa]

Ok, so the air screws were turned all the way out! I am surprised it started and ran. I adjusted them to 1.25 turns and adjusted the clutch as well. The bike now runs with choke off and indeed shifts through all gears. Drive chain is sloppy but I think I’ll take it for a short ride anyway.

Maybe I should start another thread about this bike? I won’t do a full restoration, but plan to make it a solid runner. Best to put it in the project forum?