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.

Float bowl pivot pins

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

Moderators: KeithZ1R, chrisu, paul doran, Taffus

Message
Author
User avatar
Zedorset
100Club
100Club
Posts: 161
Joined: 16th Oct 2016
Location: Blandford, Dorset.

Float bowl pivot pins

#1 PostAuthor: Zedorset » Wed Jun 06, 2018 10:17 pm

I have just got a set of 28mm mikuni’s for my Z1B, they were gummed up solid, I have got the sliders moving freely, the floats were gummed up and wouldn’t move, with carb cleaner and acf50 I got them moving fairly well.

I remember reading a post a year or so back about someone breaking off the post that the float pivot is located in, I really don’t want to risk doing the same to my carbs. Does anyone have a method of getting these pins out safely.

Any suggestions greatly appreciated.
Jon
1975 Kawasaki Z1B
2004 BMW F650GS
1954 BSA D3 Bantam

Julian_Boolean
Custard Cream
Custard Cream
Posts: 581
Joined: 20th Oct 2016
Location: Ipswich

Re: Float bowl pivot pins

#2 PostAuthor: Julian_Boolean » Thu Jun 07, 2018 8:26 am

Use a spring loaded centre punch to push them out, sometimes called an automatic centre punch.
An expanding collection of parts pretending to be a Z1100R and a Yamaha FZ750

Graham-A2
Regular Poster
Posts: 43
Joined: 4th Sep 2017
Location: Sussex

Re: Float bowl pivot pins

#3 PostAuthor: Graham-A2 » Thu Jun 07, 2018 10:06 am

I've used a pin-punch and gentle to moderate taps with a small hammer. Maybe a bit of heat to encourage them to 'unstick' and / or a penetrating oil soaking. If they are well and truly stuck together you may need to get more forceful but always bear in mind that the alloy posts are a little fragile.
Present
Red '78 KZ import - project
Other wheels - 2008 Guzzi V1200 Sport
Past 1994 - 2010
Luminous Green '78 KZ import BLE 656S

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3232
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

Re: Float bowl pivot pins

#4 PostAuthor: PAULJAC47 » Thu Jun 07, 2018 6:53 pm

It wouldnt be a bad idea to fabricate a pin press that supports behind one of the posts with a g clamp type open claw!
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

User avatar
ADRIAN H
Hardcore
Hardcore
Posts: 3392
Joined: 21st Mar 2009
Location: The Brunswick, Charminster. Bmth

Re: Float bowl pivot pins

#5 PostAuthor: ADRIAN H » Thu Jun 07, 2018 8:01 pm

Last set I did just used a very small drill bit and pushed them out. Maybe I was lucky they just fell out. If using force you will need to support rear of nearest post which you are pushing against. Use a centre punch slightly smaller than retaining pin.
👀 👀 👀
email - adrianhorsfield@live.co.uk

User avatar
Zedorset
100Club
100Club
Posts: 161
Joined: 16th Oct 2016
Location: Blandford, Dorset.

Re: Float bowl pivot pins

#6 PostAuthor: Zedorset » Thu Jun 07, 2018 8:36 pm

Thanks chaps, I think I have a cunning plan, if it works I will keep you posted :D
1975 Kawasaki Z1B
2004 BMW F650GS
1954 BSA D3 Bantam

Mr Bump
100Club
100Club
Posts: 151
Joined: 30th Dec 2015

Re: Float bowl pivot pins

#7 PostAuthor: Mr Bump » Fri Jun 08, 2018 7:15 am

They have always come out fairly easily for me once you figure out which end to drive from. Correct me if I’m wrong chaps but they are tapered on these carbs so they’ll only go back in one way round (?).

Boiling carbs in a 50/50 mix of lemon juice and water is remarkably effective at dissolving that brown gum if its really glued up. You could soak the pin holes in lemon juice (sounds a bit bizarre I know but it won’t do any harm if it doesn’t work) to see if it gets rid of any gum hiding in the holes. Heat is also your friend, though I’d be very gentle with it in a location like that.

Olly
'In your twenties you think you are immortal, in your thirties you hope you are immortal, in your forties you just hope it doesn't hurt too much'

Lemmy

User avatar
Zedorset
100Club
100Club
Posts: 161
Joined: 16th Oct 2016
Location: Blandford, Dorset.

Re: Float bowl pivot pins

#8 PostAuthor: Zedorset » Fri Jun 08, 2018 7:04 pm

Here is the brace I made out of an old Harley air filter cover, it worked a treat
Attachments
image.jpg
1975 Kawasaki Z1B
2004 BMW F650GS
1954 BSA D3 Bantam

User avatar
Al
Hardcore
Hardcore
Posts: 2211
Joined: 21st Oct 2007
Location: Farnbronx, Sin City, N.E. Hants

Re: Float bowl pivot pins

#9 PostAuthor: Al » Fri Jun 08, 2018 7:59 pm

Cleverest thing ive seen for a long time. Always a butt clenching moment taking those darned pins out, well done. Off to the shed to make one tomorrow.

AL
1981 J1

User avatar
Ginger Bear
Hardcore
Hardcore
Posts: 5358
Joined: 16th Dec 2008
Location: In the Dark.
Contact:

Re: Float bowl pivot pins

#10 PostAuthor: Ginger Bear » Thu Jun 14, 2018 6:05 am

Al wrote:Cleverest thing ive seen for a long time. Always a butt clenching moment taking those darned pins out, well done. Off to the shed to make one tomorrow.

AL


+1 :up
Image

# 104

Phil Churchett Award Winner 2011 & 2016 :D
Buzzworkz Best Modified Zed 2016

User avatar
KeithZ1R
Moderator
Posts: 2608
Joined: 15th May 2005
Location: Bury

Re: Float bowl pivot pins

#11 PostAuthor: KeithZ1R » Thu Jun 14, 2018 8:35 am

Ginger Bear wrote:
Al wrote:Cleverest thing ive seen for a long time. Always a butt clenching moment taking those darned pins out, well done. Off to the shed to make one tomorrow.

AL


+1 :up


+2 :up
Keith
:bop :gom

You can never have too many tools in your life, except the two legged variety

I'm never wrong, once I thought I was but I was
mistaken.

Phil Churchett winner 2013

User avatar
ZedHead
Hardcore
Hardcore
Posts: 2334
Joined: 9th May 2009
Location: Darlington
Contact:

Re: Float bowl pivot pins

#12 PostAuthor: ZedHead » Thu Jun 14, 2018 9:23 am

Mr Bump wrote:They have always come out fairly easily for me once you figure out which end to drive from. Correct me if I’m wrong chaps but they are tapered on these carbs so they’ll only go back in one way round (?)


That's what i thought too

User avatar
ZedHead
Hardcore
Hardcore
Posts: 2334
Joined: 9th May 2009
Location: Darlington
Contact:

Re: Float bowl pivot pins

#13 PostAuthor: ZedHead » Thu Jun 14, 2018 9:25 am

Zedorset wrote:Here is the brace I made out of an old Harley air filter cover, it worked a treat


Best use of a Harley part ever :D

User avatar
Zedorset
100Club
100Club
Posts: 161
Joined: 16th Oct 2016
Location: Blandford, Dorset.

Re: Float bowl pivot pins

#14 PostAuthor: Zedorset » Thu Jun 14, 2018 7:38 pm

ZedHead wrote:
Zedorset wrote:Here is the brace I made out of an old Harley air filter cover, it worked a treat


Best use of a Harley part ever :D

I don’t think it was ever going to be used for anything more useful.
1975 Kawasaki Z1B
2004 BMW F650GS
1954 BSA D3 Bantam


Return to “Bike Help”

Who is online

Users browsing this forum: No registered users and 28 guests