Carb rebuild

[Multiman]

Hi, having finally passed my Mod 2 I've taken my 75 400/4 out for a ride.
Initial problem was petrol coming from overflow pipes which stopped after being left overnight (pet cock off obvs).
Once hot, it died a couple times at junctions and was "jerky" at low revs.
I think sitting for a couple months hasn't done the carbs any good so intend to do a strip and rebuild.
So where's best to get carb rebuild kits? DSS, Wemoto or elsewhere?
What's Nurse Julie's eBay shop called?

On closer inspection of the carb float bowls are held on with self tappers. Joy.
I have read that folk use helicoils to fix, but was wondering if anyone had used Time Serts from Wurth and if so how did it go.
I've watched  a few videos rebuilding and read several threads on here but will no doubt come back with lots of questions.
Many thanks in advance.
Best
Tim

[Deano400]

This link should take you to Julie's Ebay site.
https://www.ebay.co.uk/usr/julies9731/

[Multiman]

Thanks Deano, I'll have a good look.

[Bryanj]

Just use Julies O ring kits and clean the original brass.
Ultrasonic cleaner is best but may be cheaper to find somebody to do it for you rather than buy one.
Not enough metal for timeserts and helicoiling 16 of those will be a pain, get new screws from Julie as well.
I have got some bits left from a 400 set, i think the bodies are ok and you can have them cheap.

[Multiman]

Thanks for the info Bryanj, good to know.
I'll order the bits from Julie as suggested.
Thanks for the carb body offer, I'll pm.

[Laverdaroo]

I have a sonic cleaner if you're stuck, bung em down to me and I'll fettle them for you. I've nowt on at the min as waiting for the frame to come back so twiddling me thumbs...........all three of em

Offers there if it helps.

[Multiman]

Very kind offer Laverdaroo.
I need to get the things off and apart which given my job list I have been given may take some time.
But once there I'll get back to you.
Cheers
Tim

[Sesman]

Just a word of caution, but be aware that ultrasonic cleaning is effective, but not the panacea of carb cleaning. I’m sure you probably know that but thought it worth mentioning. The problem children are the pilot jet drillings, which pass from float bowl to Venturi via the pilot air screw. Get yourself a can of quality carb cleaning fluid (I recommend STP) and work round the jets, being careful to systematically close them off to force fluid through the passageways. You might need a couple of cans to give them a good going over.

Oh, and look out for the spiders in the pilot jets😀

[Multiman]

Thanks Sesman for highlighting these issues. I will invest in even more carb cleaner.
I'm sure once I've got them off and apart the drillings will become clearer, but what is the Keihin carb model number to see if I can find any more info  online like a schematic.
Many thanks
Tim

[Sesman]

Now that’s a really good question that I can’t answer. I’m sure a 400/4 owner/former owner will be along shortly to answer that one.

[Sesman]

Is it not stamped on the carb flange like the 500/550 models?

[Multiman]

I think I'm asking for too much, as even with their current models, Keihin don't appear to have anything above a schematic on their website.
I'm sure it will all become obvious.
Cheers
Tim

[Sesman]

I’m sure it will. I’m guessing the main outlets are: float bowl pilot jet, air screw, Venturi outlet just behind the slide.

[Multiman]

Thanks for that.
I've spotted 054A on the flange which pulls up various results on the web so I guess thats the model number.
(Don't look at the self tapper, it will make you feel queasy)

[McCabe-Thiele (Ted)]

At least you can put a nut & bolt on that one.