Rigid/Plunger A10 Engine & Gearbox upgrade

[Nourish]

Hello, I'm looking to buy a Plunger A10 frame and crankcase(would prefer rigid) and have to source the rest. I'm not worried about originality as long as it looks nice, But I would like to include some later parts in the Engine and Gearbox. Is it possible to fit a big bearing crank (I gather that is big Big ends) thick flange barrels and alloy head and box internals - or should I ask what won't fit?
Cheers

[Briz]

No problem fitting the good stuff to plunger cases at all.
Only thing to look out for is to get the later plunger cases; earlier ones lacked an oil feed to the cam (this is just a relief-valve vent) and a proper crank seal.
Later ones are stamped BA10 (or A7), earlier ones, ZA10 (or A7)
You cant fit the later gearbox internals (& inner cover) without building up the case with weld & machining. I did it years ago; wasn't really worth the hassle. The mainshaft interchanges OK though if you want to run a decent clutch. But a Norton clutch fits the plunger mainshaft.

[muskrat]

G'day Nourish.
The alloy head will be a problem on an A10 plunger (OK on an A7). The extra downdraught angle means the carb sits higher and fouls the frame.
Cheers

[trevinoz]

The engines without feed to the camshaft are only the long strke A7s.
All A10 and A7 from AA7 series have oil to the cam.

Trev.

[wilko]

I saw a rigid frame on ebay somewhere recently. And a rear backing plate.

[Briz]

The engines without feed to the camshaft are only the long strke A7s.
All A10 and A7 from AA7 series have oil to the cam.
Trev.

Nope; my first ever A10 - a 1950 - was a ZA10 case without the cam feed.

[wilko]

http://www.ebay.com.au/itm/BSA-A7-Rigid-Frame-/190912606991?pt=AU_Motorcycle_Parts_Accessories&hash=item2c7347330f&_uhb=1

[Nourish]

I would love to buy the frame - it's pick up ony - any one know the price of a ticket to Aus from the UK?
Sorry I can't help being sarcastic

[duTch]

 You might have trouble getting it  on the plane as hand luggage..

 Same guy must have stripped a longstroke
 http://www.ebay.com.au/itm/BSA-A7-Longstroke-Crank-Cases/190926086101?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D11%26meid%3D2225494138763577697%26pid%3D100011%26prg%3D1005%26rk%3D5%26rkt%3D5%26sd%3D190912606991%26

 I built up my A10 from bits, and didn't have any trouble with fitting a 389 mono carb to the alloy head-(oh just remembered I had to truncate the very top where choke cable would go but don't need a choke anyway), just couldn't fit an air filter, which is why I did the offset inlet tract..
 Also I did graft in some close ratio gears, which worked ok, but needed special attention to bushings, but am not using that box just now, have to dissect it and see what's what...