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Author Topic: New Carbs for BSA A65  (Read 5882 times)

Offline peteR

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New Carbs for BSA A65
« on: January 10, 2012, 09:33:07 PM »
Hi,
can anyone advise on the correct carbs/specs I should have on my 1965 BSA A65 Spitfire Hornet?
Thanks
Pete
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Offline bikerbob

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Re: New Carbs for BSA A65
« Reply #1 on: January 11, 2012, 04:19:57 PM »
Hi there According to a disc that I have on A65's the Carbs should be
AMAL R.930/24 (right hand concentric)
AMAL R. 930/25 (left hand concentric )
Main Jet  190
Pilot Jet    25
Needle     .106
Needle position  3
Nominal Choke size 30mm
Air Cleaner Dry Surgical Gauze
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Offline L.A.B.

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Re: New Carbs for BSA A65
« Reply #2 on: January 11, 2012, 04:56:17 PM »
Quote from: bikerbob on January 11, 2012, 04:19:57 PM
Hi there According to a disc that I have on A65's the Carbs should be
AMAL R.930/24 (right hand concentric)
AMAL R. 930/25 (left hand concentric )


Concentric carbs were not available before 1967.

A 1965 A65 S/H would have had two 389/206 Monoblocs.

Main jet: 220
Pilot: 25
Throttle slide: 389/3½
Needle jet: .106
Needle position: 3
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L.A.B.

Offline peteR

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Re: New Carbs for BSA A65
« Reply #3 on: January 11, 2012, 05:47:00 PM »
Many thanks LAB!

Your help is appreciated!

Pete.
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Offline largeviking

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Re: New Carbs for BSA A65
« Reply #4 on: January 27, 2012, 01:58:09 PM »
My A65 Rocket runs nicely on 930 concentrics, with 200 jets and top needle slot. Cut away is 3.5 I think.
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