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Messages - Bess

Pages: 1 ... 13 14 [15] 16 17
212
Twins / Re: A65 Lightning carburettors
« on: 08 March, 2017, 20:28:49 »
Thanks again Arthur.

Best wishes...

214
Twins / A65 Lightning carburettors
« on: 08 March, 2017, 12:58:11 »
Hi all,
         I am the point where I need to buy carbs. Machine 1, is Oct 1968, 9:1 pistons with a  twin carb head. The other is Aug/Sept 1968  single carb head with 9:1 pistons (Thanks JulianJ for dating). Both heads have 1.598 inlet and 1.410 exhaust valve diameters.

I have looked at the manuals and services sheets and I not sure which would be the best carbs to buy, jets and settings I should adopt as I am sure I haven't got all the information. I am also aware that as time went on BSA improved fuel delivery.

Any spark plug advice would aslo be appreciated.

Best wishes.....

215
Twins / Re: A65 - Engine spacers
« on: 06 March, 2017, 18:23:28 »
I need two 68-0886's and I have managed to get one.

From your information I have decided to get a 68-0687 which should be okay as it's around 6 thou larger, a bit of fitting should do the trick.

Thanks again...

216
Twins / Re: A65 - Engine spacers
« on: 06 March, 2017, 17:50:27 »
Hi Arthur,
               Thanks....

217
Twins / A65 - Engine spacers
« on: 06 March, 2017, 16:35:07 »
Hi,

Could anyone let me have the dimensions of the following engine spacers:

68-0686 and 68-687

Thanks...

218
Twins / Re: Engine numbers
« on: 06 March, 2017, 16:18:18 »
Thanks JulianS, much appriciated.....

219
Twins / Re: Engine numbers
« on: 06 March, 2017, 11:28:01 »
Hi JulianS,
                 I agree very confusing.

Roy Bacon explaining the new coding was introduced in 1969, the seasons starting July 1969 for 1970 and August for 1971 and 1972. The other attachment stating it started in 1969, C being Aug 1968 to July 1969.

The 1969 bikes started with A65LC-101 but there wasn't any 1969 bikes built, it seems only built in August/September 1968.

Lucky for me they dropped the close ratio gearbox otherwise my engine number would have been NCC 01701, very similar to Star Trek Starship Enterprise designation. :)

[attachment deleted by admin]

220
Twins / Re: Engine numbers
« on: 06 March, 2017, 08:09:53 »
Hi JulianS,
                 It sort of made sense until BSA'S own example at the bottom of page 2 of your attachment. That example dates my NC engine as October 1969 not 1968.

221
Twins / Re: A65 - O rings
« on: 05 March, 2017, 20:24:09 »
Hi,
    I have managed to get the dimensions of all the o rings....thanks

222
Twins / Re: A65 - O rings
« on: 05 March, 2017, 14:01:22 »
Hi Arthur,
                Managed to determine the engine dates which are 1968 and 1969.

Best wished....

223
Twins / Re: Engine numbers
« on: 05 March, 2017, 13:59:30 »
Hi,
     Just found the attachment whilst trying to date my A65 engines.

Bizarrely I have one engine with the old system (A65LC *****) which is dated 1969 and the other with the new system NC***** A65L which is dated 1968, I wasn't expecting that.

The Roy Bacon publication does not give the full new system year codes only D,E and G so I was struggling to date the NC***** A65L engine. The attachment gives all the year prefixes C, D, E, G and H.

Hopefully this attachment is correct...

224
Twins / Re: Engine numbers
« on: 05 March, 2017, 11:51:41 »
Hi,

     The Roy Bacon Twin restoration books gives engine numbers starting from A65B-334 as 1965 model A65R.

Hope this helps...

225
The Star and Garter / Re: TRike
« on: 05 March, 2017, 11:01:29 »
Love the exhaust note....

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