Fuel system queries

[Guest]

Hi guys, just bought a GS1000S and have a few early questions


Its in great shape but quite a few jobs. First questions-

1. Trying to get it to run right and when I had the tank off I noticed there is an inlet or outlet tube coming off the tank gauge unit. What's this for and should it be connected to anything?

2. looking at the top of the carbs, I noticed three of the carbs have what looks to be vacuum take offs. One is connected to the diaphragm for the fuel tap but the others are open. Should the others be hooked up somewhere or are they spares or something?

3. It does tick over but the clutch quite noisy unless I pull in the lever a bit. Is this a worn basket or is it an easy fix?


These are just a few ive noticed so far but there will be plenty more

Thanks in advance, Steve

[hampshirehog]

1. That's a safety hose in case the fuel sender gasket springs a leak. They don't leak normally but there should be a long hose that heads off down to the back of the engine so that any leaked fuel dribbles on to the Tarmac instead of your engine.

2. Those spare nipples are carb vents - keeps air pressure the same inside as out. They should have a hose attached on each side that then dangles loosely over the shoulders of the airbox.

3. They all do that..... Well, not all of them. The common causes are worn springs or a loose main nut. A good carb balance can quieten things down sometimes.

[Steve]

Yep, what he said.

.

[Devon bloke]

1. That's a safety hose in case the fuel sender gasket springs a leak. They don't leak normally but there should be a long hose that heads off down to the back of the engine so that any leaked fuel dribbles on to the Tarmac instead of your engine.

2. Those spare nipples are carb vents - keeps air pressure the same inside as out. They should have a hose attached on each side that then dangles loosely over the shoulders of the airbox.

3. They all do that..... Well, not all of them. The common causes are worn springs or a loose main nut. A good carb balance can quieten things down sometimes.

Brilliant thanks Hampshire hog your my new best friend

[chuck hahn]

Get a clutch cover gasket and check that hub nut pronto before yopu do a lot of engine running. then proceed with the normal maintenace blitz and carb syching etc etc.

[Devon bloke]

Get a clutch cover gasket and check that hub nut pronto before yopu do a lot of engine running. then proceed with the normal maintenace blitz and carb syching etc etc.

Hub nut? do you mean check the clutch and basket isn't gonna let loose?

[Agemax]

it can do an awful lot of damage if it comes loose and you carry on riding! check it ASAP

[Big T]

Hub nut? do you mean check the clutch and basket isn't gonna let loose?

The clutch hub nut coming loose is very common

Pull the clutch cover and strip the clutch down to it's hub and check the nut. Also check the backing plate and backing springs while you're in there

[Devon bloke]

Ok thanks guys. I haven't been out on it yet. The guy I bought it off has only just everything back together and he said he has done about 30 on it to MOT etc. I want to check over the bike properly before it goes out the road. I just want to make sure I can get it to run well first. Waiting for my carb balancer to turn up so I can balance the carbs properly. Still not sure about the balancing yet, still researching. I seem to have brass adjustment screws when others seem to have steel screws? Ill have more questions shortly Oh and the clutch nut will be the next job after carb syncing

[Steve]

Still not sure about the balancing yet, still researching. I seem to have brass adjustment screws when others seem to have steel screws?

Make sure you are looking at the right screws.

The balance adjusters are the three screws between the carbs.

In all the bikes that I have worked on over the years, they have ALL been steel.

.

[Devon bloke]

Make sure you are looking at the right screws.

The balance adjusters are the three screws between the carbs.

In all the bikes that I have worked on over the years, they have ALL been steel.

.

From my limited experience I guessed these are mixture screws but prob way off lol. I'm still looking at my carbs ill try and put pics up in case someone can draw an arrow on to point me in the right direction

[hampshirehog]

He's on about CV carbs. You have 4 adjusters (one for each carb). Take the csrb tops off and you'll see them.

[Devon bloke]

He's on about CV carbs. You have 4 adjusters (one for each carb). Take the csrb tops off and you'll see them.

Oh right so all screws that I need are inside the covers so all I need to do is remove the covers to be able to adjust the carbs using vacuum gauges?

[Big T]

Oh right so all screws that I need are inside the covers so all I need to do is remove the covers to be able to adjust the carbs using vacuum gauges?

Well, you'll need a skinny wrench and a screwdriver

Or, the Motion Pro carb tool

But, yeah, remove the caps and the adjusters are right there

[Devon bloke]

Cheers mate, looked again at the diagrams and I see now the adjustment is internal. Just expected the adjusters to be on the outside of the linkage