Jump to content

GS1000 26mm carbs -rebuild issue!


Recommended Posts

Just rebuilt the slide carbs and they run great now, but noticed a load of fuel leaking around the float bowls. Thought I must have a sticky float needle but traced it to leaky interface between the two middle carbs and the fuel inlet t-piece. I thought it was a little slack when I refitted it. It also has about 2mm of slop so that you can easily shift its position between the two carbs. Looks to me that you cannot get this part any more so is there a standard way to bond this back in place? I suppose I ought to do the same for the joining links between middle and outer carbs too, as they are also 40 years old!

Link to comment

Thanks, might be able to squish an o-ring either side. The two 'built-in' o-rings on either side of the t-piece have squared off and don't seal now. Shame you can't buy just the rubber top hat pieces that contain the seals. I like the idea of flexible sealer, but what is resistant to petrol? Is Hylomar instant gasket?

Link to comment

I'm assuming your fuel T are the rubberized style, rather than O rings

1st, wait and see is the leaking stops. It should take 12-24 hours. The rubberish material dries out when not exposed to fuel and should expand.

If not, there are some O ring replacements, but I don't have a link for you. Because,  all of my rubberized ones don't leak

Link to comment
Guest YoshiJohnny

I have some old 29s in a box that I was gonna sling as the pilots are snapped off in at least one and I CBA drilling them out..

yours for post

 

Link to comment

Thanks YoshiJohnny, if the 29's are the same as 26's, they are bound to be useful for bits, especially if the fuel inlet bits are good. Let me know how much you need and i can bank transfer or PP you. Post code is BH25 5GY.

Will look at the Allens site and see if they have the bits too, thanks gshub.

 

Edited by simesman
Link to comment
  • 3 months later...

I've only just got my VM's running properly now! It has taken bloody ages to get them just right. In the end, I had to re-fit the 17.5 pilot jets and change to standard 95 mains. It has been a bit of a nightmare removing and refitting the carbs and generally tweaking them in but they are perfect now.

I used a Morgan carbtune to sync them but getting the mixture right was impossible without the Gunson colourtune. Now I have always found these to be crap, but with the VM's that have the fuel and air screw adjustment, they are essential! I set the fuel screw to 3/4 turns out on all carbs and the air screw to 1.5. Then you can either use the carbtune or colourtune to determine which cylinders are running lean. I could see with the carbtune that cylinders 1 and 4 were popping as the metal rods bounced violently whenever the motor popped. Initially I suspected coil issues, so changed these and the popping remained. So, another quarter turn on 1 and 4 fuel screws and popping stopped. I then tweaked each air screw using the colourtune and they are all wherever the colourtune told me was optimum.

Very happy with the carbs now.

Edited by simesman
  • Like 4
Link to comment
  • 2 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...