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Old 11-05-2013, 05:33 PM   #1
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Default '53 BSA A7 chop/bob/build

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Old 11-05-2013, 05:40 PM   #2
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Default Re: '53 BSA A7 chop/bob/build

With the Lightning Rocket Clubman wrapped up...it's time for the next Beezer.
No café this time. I really want to step up the build, and in the words of 'Big Dan Teague" it's time to receive an advanced tutorial. LOL
I have a color, and I have the tires...
just fill in the blank.
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Old 11-05-2013, 07:58 PM   #3
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Default Re: '53 BSA A7 chop/bob/build

Nice,working on my 57 bsa 650 myself.
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Old 11-05-2013, 08:16 PM   #4
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Default Re: '53 BSA A7 chop/bob/build

can't get enough BSAs.... looking forward to it
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Old 11-06-2013, 04:37 AM   #5
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Nice,working on my 57 bsa 650 myself.
Very Cool!
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Old 11-06-2013, 06:07 AM   #6
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Default Re: '53 BSA A7 chop/bob/build

Go go go ! Can't wait
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Old 11-09-2013, 05:27 PM   #7
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Default Re: '53 BSA A7 chop/bob/build



Started chopping on the A7 today...after laying out centers on my frame table, and getting her bolted down. My David Bird rigid subframe should be here soon.
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Old 11-09-2013, 06:01 PM   #8
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Cool Re: '53 BSA A7 chop/bob/build

Looking good so far...will be interested to see just how the DB hardtail attaches to the front frame section. What is the stretch and drop, etc. of the DB hardtail you have on the way ?
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Old 11-09-2013, 07:37 PM   #9
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Default Re: '53 BSA A7 chop/bob/build

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Looking good so far...will be interested to see just how the DB hardtail attaches to the front frame section. What is the stretch and drop, etc. of the DB hardtail you have on the way ?
As per DB's recommendation: 4" stretch, 2.5 drop.
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Old 11-09-2013, 08:17 PM   #10
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Default Re: '53 BSA A7 chop/bob/build

long and low
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Old 11-10-2013, 11:51 AM   #11
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Default Re: '53 BSA A7 chop/bob/build

did you bought a kit to stretch and drop?
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Old 11-10-2013, 11:59 AM   #12
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Default Re: '53 BSA A7 chop/bob/build

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did you bought a kit to stretch and drop?
Yes,
The sub frames are available in several combinations,
from 0 stretch, 0 drop, to 6 stretch and 2.5 drop.
Anymore than 2.5 drop and it becomes very close to the ground, as per DB. I wanted it to be lower, but I don't want to drag shiny stuff on the ground.
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Old 11-12-2013, 04:23 AM   #13
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Default Re: '53 BSA A7 chop/bob/build

Another few hours of great weather before today's cold snap...
Still cleaning up on the old welds.

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Old 11-12-2013, 09:24 PM   #14
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Cool Re: '53 BSA A7 chop/bob/build

I agree, should look look pretty nice. One thing I like about the Pre-Unit BSA swing-arm bikes it their length as opposed to the Unit swing-arm models where they always look like they need another two inches of stretch in the rear. So, the proportions are right and can only imagine the DB hardtail will look fantastic.


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As per DB's recommendation: 4" stretch, 2.5 drop.
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Old 11-13-2013, 04:34 AM   #15
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Default Re: '53 BSA A7 chop/bob/build

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I agree, should look look pretty nice. One thing I like about the Pre-Unit BSA swing-arm bikes it their length as opposed to the Unit swing-arm models where they always look like they need another two inches of stretch in the rear. So, the proportions are right and can only imagine the DB hardtail will look fantastic.
I agree Tiger...that extra room provided by the gearbox/primary already stretches them out a bit.
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Old 11-15-2013, 05:01 PM   #16
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Default Re: '53 BSA A7 chop/bob/build



Starting to prep the cases...
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Old 11-16-2013, 03:30 PM   #17
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Default Re: '53 BSA A7 chop/bob/build

Do you refit your original engine or modified?
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Old 11-16-2013, 04:54 PM   #18
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Default Re: '53 BSA A7 chop/bob/build

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Do you refit your original engine or modified?
I usually do a few upgrades along the way...might as well, as it's apart.
Billet con-rods, SRM oil pump and OPRV, Boyer ignition, etc.
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Old 11-25-2013, 04:31 PM   #19
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Old 11-25-2013, 04:34 PM   #20
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Default Re: '53 BSA A7 chop/bob/build

With Enzo wrapping up his A7, I figured I better post some of my progress...
Rear hub is back from powdercoating.
Rear hard tail should arrive this week.
Slow progress at this point. I spent the weekend upgrading the electric panel in the garage...now I can tool-up.
-Luke
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