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CB350/400
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Carb float settings - advice please
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Topic: Carb float settings - advice please (Read 15801 times)
Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Carb float settings - advice please
«
on:
February 12, 2015, 12:52:34 PM »
Hi Chaps.
Putting carbs back together. I have 3 floats sitting at 21mm and 1 sitting at 22.5mm. Am I right in assuming I just adjust the little brass tab in the centre of the float arm to take up the difference ?.
Ta in advance
Julie
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paul G
SOHC Master
Posts: 1764
Re: Carb float settings - advice please
«
Reply #1 on:
February 12, 2015, 01:03:52 PM »
Julie,
The float height for the F2 is 21mm and yes adjust the height with the little bras tab in the middle.
Be gentle with them and make sure the tab is just touching the little pin in the cantre of the valve and both floats are level.
A bit messy but time well spent.
Regards,
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Honda CB400/4
Kawasaki Z650 C2
Honda CD175 sloper
Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Re: Carb float settings - advice please
«
Reply #2 on:
February 12, 2015, 01:06:37 PM »
Thanks Paul.
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paul G
SOHC Master
Posts: 1764
Re: Carb float settings - advice please
«
Reply #3 on:
February 12, 2015, 06:04:58 PM »
Your welcome.
Are you any good with backs
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Honda CB400/4
Kawasaki Z650 C2
Honda CD175 sloper
Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Re: Carb float settings - advice please
«
Reply #4 on:
February 12, 2015, 06:10:16 PM »
Pretty good with backs Paul. Mind you, all that fiddling with those little bits and pieces on my carbs have made my hands crampy, I don't know how you chaps manage with big hands, must be a right nightmare
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paul G
SOHC Master
Posts: 1764
Re: Carb float settings - advice please
«
Reply #5 on:
February 12, 2015, 06:58:25 PM »
Patience is the key.
Back gone beyond that, in for surgery in March on a prolapsed disc.
The pain in my legs is unbelievable hopefully back to normal for the spring fingers crossed.
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Honda CB400/4
Kawasaki Z650 C2
Honda CD175 sloper
Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Re: Carb float settings - advice please
«
Reply #6 on:
February 12, 2015, 07:16:27 PM »
Usually a very successful and straight forward procedure Paul. Hope all goes well and I'm sure you will be up and running in no time at all.
Julie
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Bitsa (Ralph Wright - RIP)
SOHC Jedi
Posts: 2937
Re: Carb float settings - advice please
«
Reply #7 on:
February 12, 2015, 07:36:25 PM »
Julie
Your not alone yes crampy fingers when messing around with carbs no matter what bike especially when its cold.
Good luck
Ralph
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Long Live Best Bitter.Status Quo and Sohc Bikes and common sense which you can not teach
Clem2112
Midlife
SOHC Expert
Posts: 282
CB400F1 1976 R1200GS 2016 Matchless G80 1955
Re: Carb float settings - advice please
«
Reply #8 on:
February 12, 2015, 08:47:47 PM »
That's what kitchens were meant for... Warm, near the kettle, good lighting........
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paul G
SOHC Master
Posts: 1764
Re: Carb float settings - advice please
«
Reply #9 on:
February 12, 2015, 09:19:41 PM »
Spend some time on them Julie, check and check again as the time is a tenth of having the aggro of taking them off again.
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Honda CB400/4
Kawasaki Z650 C2
Honda CD175 sloper
Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Re: Carb float settings - advice please
«
Reply #10 on:
February 12, 2015, 09:27:55 PM »
I have checked so often today Paul I'm now going cross eyed
. Thing are looking hopeful, haven't got any bits left over and I didn't have to resort to the hammer which makes a change for me
. Fiddly job but a nice job to do though. Will see if she fire's up in a couple of weeks before I start singing my own praises.
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LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new
Clem2112
Midlife
SOHC Expert
Posts: 282
CB400F1 1976 R1200GS 2016 Matchless G80 1955
Re: Carb float settings - advice please
«
Reply #11 on:
February 12, 2015, 09:47:12 PM »
Some people set the float heights at 22mm !
It's worth checking the actual fuel levels in the bowls once they are all assembled to the rack and before re-fitting them.
This should verify that the float adjustments you made are accurate.
You can make a diy level gauge from a modified float bowl drain plug and some clear tubing.
There is no Honda data for the fuel level required but all four should be the same when measured from the joint face.
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Bryanj
Grogu
Posts: 12559
Re: Carb float settings - advice please
«
Reply #12 on:
February 13, 2015, 06:02:05 AM »
Before you finish make sure that the tiny pin on the float valve actually moves and is spring loaded, sometimes a sticky one can be freed with a dose of carb cleaner.
When setting the float level the "Tang" should be just touching the pin and not depressing it at all
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Nurse Julie
1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
Grogu
Posts: 8718
Re: Carb float settings - advice please
«
Reply #13 on:
February 13, 2015, 07:05:34 PM »
Well, I have checked the float levels, re adjusted them, checked again and again and again. I think I will leave them alone now for the weekend and then fit them on the bike Monday.........after checking them again I suppose
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LINK TO MY EBAY PAGE. As many of you know already, I give discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562
LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
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Johnwebley
SOHC Jedi
Posts: 3740
Re: Carb float settings - advice please
«
Reply #14 on:
February 13, 2015, 07:32:22 PM »
setting the level is a pain,if you do it with the carbs in normal running position,its VERY tricky not to compress the little plunger,
if you invert the carbs,so the needle sits on the top of the fuel inlet,maybe its easier,either way,its a pain,
good luck
and I am sure all your hard work will be worthwhile
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lifelong motorcycle rider,and fan
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Carb float settings - advice please