Author Topic: concentric carb on a10?  (Read 4890 times)

Offline mario medeiros

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concentric carb on a10?
« on: 02.12. 2013 12:52 »
Have a 1957 a10 i just bought and i know it is to have a mono block carb but someone replaced it with a concentric and i just wanted to ask which one will work on my 650?And does a concentric work well on a a10?Thanks

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Re: concentric carb on a10?
« Reply #1 on: 02.12. 2013 18:52 »
G'day Mario.
I don't have one on an A10 but I do have a 932 on my '51 A7 (with a '57 SS top end) and a friends '52 A7 ST has a 626. Both work quite well once jetted correctly. The cons do suffer with a sticking slide if the mounting nuts are too tight. They don't suffer from altering idle speed when on the side stand or upright.
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
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Muskys Plunger A7

Offline Billybream

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Re: concentric carb on a10?
« Reply #2 on: 02.12. 2013 19:13 »
Hi Mario.
I have Mk 1 type 900 concentric on my Super Rocket, been fitted since 1970. Just overhauled with new stayup float and needle valve kit. No running issues to report.
Burlin Fuels is great web site for Amal : http://amalcarb.co.uk
1960 Super Rocket, owned since 1966, back on the road 2012 after being laid up for 29yrs.

Offline Seabee

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Re: concentric carb on a10?
« Reply #3 on: 02.12. 2013 20:33 »
Hi Mario,

I have one on my 57 RR and it works well.  I only have the tickler for cold starts, so on a really cold day it can be a bugger to start!

Seabee
1961 Super Rocket
1957 Road Rocket
2009 Harley Electra Glide Classic
1993 Harley Springer Softtail
1971 Harley Shovelhead
1970 Harley Sportster Chopper
1957 Harley Panhead Chopper
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Offline mario medeiros

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Re: concentric carb on a10?
« Reply #4 on: 03.12. 2013 00:11 »
Hi Seabee,what kind do you have?as far as a model number,thanks

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Re: concentric carb on a10?
« Reply #5 on: 03.12. 2013 12:11 »
I've had a concentric on my A for over 7yrs and it hasn't ever caused a problem, BobH.
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Offline Seabee

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Re: concentric carb on a10?
« Reply #6 on: 03.12. 2013 12:57 »
Sorry Mario, it's a 932.  Not sure on jetting as it was on the bike when I bought it and ran so good I left it alone!  I do wish it had a choke as my concentric does on my 61 A10.
1961 Super Rocket
1957 Road Rocket
2009 Harley Electra Glide Classic
1993 Harley Springer Softtail
1971 Harley Shovelhead
1970 Harley Sportster Chopper
1957 Harley Panhead Chopper
1982 Yamaha XT550
2001 KTM EXC 400
1970 Honda CT70
Southern Illinois, USA

Offline Duncan R

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Re: concentric carb on a10?
« Reply #7 on: 03.12. 2013 17:00 »
Mine also runs a concentric with no issues - Seabeee, if you are not allready aware you can reto fit a choke I got all the parts from Burlin fuels. Didn't seem to make much difference though.

Cheers

Duncan
Anglo - Indian A7SS (Actually is a 650)
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Offline taroha10

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Re: concentric carb on a10?
« Reply #8 on: 03.12. 2013 21:17 »
My super rocket also runs fine on a concentric. It doesn't like ticking over on the side stand but to be honest I haven't spent any time trying to find out why. Not sure off the top of my head what size or jetting it has.
Good luck with it.
Mark

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Re: concentric carb on a10?
« Reply #9 on: 04.12. 2013 07:45 »
My '50 GF has a concentrric 928, no.3 throttle valve, needle position 1, needle jet 106, main jet 220, no filter, 356 cam.

It runs clean all the way through the rev range, and have checked with colourtune plug.
Ted Wilkinson, Ramsbottom, Lancashire
1950 Golden Flash

Offline victortrry

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Re: concentric carb on a10?
« Reply #10 on: 03.06. 2014 07:23 »
I have tried to fit a 930 concentric on my 54GF but it is too tall, how does it fit on s 50GF?

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Re: concentric carb on a10?
« Reply #11 on: 03.06. 2014 09:53 »
G'day Victor.
Is that a 930 Mk1 or a 2930 Mk2 concentric? I'm sure the 930 will fit, not sure of the 2930.
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7

Offline victortrry

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Re: concentric carb on a10?
« Reply #12 on: 03.06. 2014 10:37 »
Mark 1 concentric, its too high.

Online olev

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Re: concentric carb on a10?
« Reply #13 on: 03.06. 2014 10:53 »
Musky,
I have a 52 A7 ST (work in progress) - probably the same as your mates.
Can you ask him if he wrote down the jetting etc for his 626.
I'm assuming it doesn't have an air cleaner
Was contemplating using a keihin type JRC but might hunt down a 626 after reading this.
I've got a 930 working well on my greeves. Havent had any luck in the past with mikunis.
cheers

ps. serious game of footy the other night. hey!

Online Ted_Flash

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Re: concentric carb on a10?
« Reply #14 on: 03.06. 2014 12:02 »
I have tried to fit a 930 concentric on my 54GF but it is too tall, how does it fit on s 50GF?

Fits fine, about an inch clearance to the frame.  I can't get the slide out with the carb in situ, but there's no problems with the cables.

Should have mentioned - flat top 7.25 pistons fitted.
Ted Wilkinson, Ramsbottom, Lancashire
1950 Golden Flash