Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

Removing A4 carbs

Need help restoring, building, or finding then try here.

Moderators: chrisu, paul doran, Taffus, KeithZ1R

Message
Author
User avatar
Andrew_s
Custard Cream
Custard Cream
Posts: 948
Joined: 5th Dec 2016
Location: Farnham, Surrey

Removing A4 carbs

#1 PostAuthor: Andrew_s » Sat Nov 03, 2018 5:21 pm

Hi folks,

I'm going to remove the A4's carbs in the coming weeks as fuel has been leaking for a while which looks more like a dirty golden syrup under the float bowls - I think it's coming from perished O-rings in the drain screws but any common areas to look out for?

Anything to be aware of before I start?

Cheers
Andrew
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E

User avatar
warren3200gt
Hardcore
Hardcore
Posts: 2686
Joined: 13th Jun 2014
Location: Dartford Kent

Re: Removing A4 carbs

#2 PostAuthor: warren3200gt » Sat Nov 03, 2018 5:57 pm

Just check the drain screw o rings before taking the carbs off. If it is leaking from the drain screws then taking the carbs off is a little excessive. Orange / golden syrup is evaporated modern fuel.
Short term fix if its o rings is a smear of silicon gasket goo around them before screwing back in. Leave over night to set before turning the tap on.
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.

User avatar
Andrew_s
Custard Cream
Custard Cream
Posts: 948
Joined: 5th Dec 2016
Location: Farnham, Surrey

Re: Removing A4 carbs

#3 PostAuthor: Andrew_s » Sat Nov 03, 2018 6:44 pm

Thanks, got the O-rings, but the carbs they're looking pretty grubby so a decent degrease will do them good - just wondered if there was anything to be mindful of when taking them off.
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E

User avatar
warren3200gt
Hardcore
Hardcore
Posts: 2686
Joined: 13th Jun 2014
Location: Dartford Kent

Re: Removing A4 carbs

#4 PostAuthor: warren3200gt » Sat Nov 03, 2018 7:06 pm

Hardest bit is setting cables to the correct tension on re instalation which is eay to do. If your striping them down for a clean just ensure you keep the bits together for each carb.
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.

zededeee
new poster
Posts: 8
Joined: 26th Jul 2017
Location: england

Re: Removing A4 carbs

#5 PostAuthor: zededeee » Thu Nov 08, 2018 1:41 am

Esso super premium unleaded petrol (97 + octane) does not contain ethanol, BP possibly not also. See their sites for more info. i tested the Esso fuel and no ethanol was there. Ethanol is what causes the problems on seals and sticky deposits. There is no legal requirement to add 5% ethanol to 97+ octane petrol.

User avatar
Ultim8pc
Hardcore
Hardcore
Posts: 2130
Joined: 5th Sep 2014
Location: Keighley, West yorkshire
Contact:

Re: Removing A4 carbs

#6 PostAuthor: Ultim8pc » Thu Nov 08, 2018 8:53 am

In my experience, if they exhibiting goop on the outside then it's worth taking them off and looking in the float bowls to see if they need a clean. Use new float bowl gaskets, I recommend the Keyster ones (and their rebuild kits) as they are not made form card and I have never seen any of them leak after fitting.
But while you have the carbs out I'd recommend checking them thoroughly and setting them up.
Give me a shout if you get stuck.
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.

ddg900
Regular Poster
Posts: 77
Joined: 12th Sep 2015
Location: Hampshire

Re: Removing A4 carbs

#7 PostAuthor: ddg900 » Thu Nov 08, 2018 11:16 pm

Is it possible to remove all four float bowls with the carbs in-situ? just wondering because I have a slight leak from the bowl gasket on no.2 carb, and bowl screws in carb 3 could do with replacing with new ones - having to take the whole shebang out to get at/replace the one weepie gasket/four screws is maybe a task not worth doing until the carbs actually need a full strip n clean?
KAWASAKI KZ900A4
SUZUKI GT250M
H**** CB250G5
H**** CB360G5

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3257
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

Re: Removing A4 carbs

#8 PostAuthor: PAULJAC47 » Fri Nov 09, 2018 8:57 am

Done it loads of times,a small right handle ratchet with a cross head,plus a mirror and a piece of rag to catch the juice...Paul j
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."
-Han Solo

You can't polish a turd, but you can roll it in glitter

Salad is what real food eats.
Anon

PUM 673

ddg900
Regular Poster
Posts: 77
Joined: 12th Sep 2015
Location: Hampshire

Re: Removing A4 carbs

#9 PostAuthor: ddg900 » Fri Nov 09, 2018 10:20 pm

Thank you :) well, there's the next job ... :D
KAWASAKI KZ900A4
SUZUKI GT250M
H**** CB250G5
H**** CB360G5

User avatar
Andrew_s
Custard Cream
Custard Cream
Posts: 948
Joined: 5th Dec 2016
Location: Farnham, Surrey

Re: Removing A4 carbs

#10 PostAuthor: Andrew_s » Sat Nov 10, 2018 6:52 am

Thanks for tips and advice folks - Paul, useful tip about the float bowls!
Current Bikes:
Phil Churchett's 1976 Z900 A4: PRE 2R https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1973 XL250 K0 Motosport: UKX 73L
2023 R1250 GSA
Previous Zeds: Z750B1 Twin, Z650B1, Z750E


Return to “Bike Help”

Who is online

Users browsing this forum: MartinRJ and 44 guests