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Motorcycle Discussions => British Bikes => Topic started by: peteR on January 10, 2012, 09:33:07 PM

Title: New Carbs for BSA A65
Post by: peteR 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

Title: Re: New Carbs for BSA A65
Post by: 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 )
Main Jet  190
Pilot Jet    25
Needle     .106
Needle position  3
Nominal Choke size 30mm
Air Cleaner Dry Surgical Gauze

Title: Re: New Carbs for BSA A65
Post by: L.A.B. 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

Title: Re: New Carbs for BSA A65
Post by: peteR on January 11, 2012, 05:47:00 PM

Many thanks LAB!

Your help is appreciated!

Pete.

Title: Re: New Carbs for BSA A65
Post by: largeviking 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.