1954 A7 Daytona

[Beeza]

Greetings all.
This is my Daytona restoration, it has been under way for about 3 years ! To date there has been a lot of research on this particular bike (it is original), also a lot of time trying to find some of the rare one off parts for this bike, and also the fabrication of components unique to this bike and the other rigid Daytona racers. Most of the parts have been painted, chrome plated and cad plated to date, so the assembly begins now, I am still waiting for the motor to return from my motor builder (hopefully Santa knows I have been nice). As this build progresses I will do some photo updates, I may not answer all questions asked, for this I apologise now. This bike will be at the BSA International rally at Halls Gap, Victoria, Australia to be held from November 9th to 16th 2018 (entries are open and I'm booked in). Hope to see everyone there.

[Tomcat]

Nice project Beeza, it'll be good to see it come together. Fixing the frame to a stand is a great idea, and you had better finish off that Corona! 

[Beeza]

Merry Xmas everyone, Santa has heard my request and now I have an engine for my bike.
As you can see the Daytona gear box and engine are now in the frame, with quite a bit more work to button it all up, before the rest of the frame parts and wheels go in.
The engine has a lightened and balanced crank, steel H beam rods,forged pistons, and I chose to run a 357 cam. I do have a 358 cam, but for several reasons I decided against it for now.

Cheers for now and Merry Xmas

[Beeza]

Just a photo update, before I close up the timing side.
All has been going OK so far, 1 carb & the oil filter, just for the photo.
Cheers.

[Beeza]

Hi all, forks and guards are in. Progress is a bit slow being the Xmas holidays and all, but it's certainly coming along.
Trying to find an 18 tooth gearbox sprocket so as I can fit the clutch and primary drive.

Cheers and happy new year

[chaterlea25]

Hi Beeza,
Looking GOOD 

The18 tooth gearbox sprockets are available on eBay.

https://www.ebay.co.uk/itm/BSA-A10-18T-TOOTH-GEARBOX-SPROCKET/322984603569?hash=item4b3361efb1:g:hWsAAOSwRUhY~oa~

John

[jfligg]

Hello Beeza  I am just wondering what gearbox ratio are you using?  Jeff

[Sluggo]

Very interesting build, will follow with interest.  Very few of those made or exist.  Any updates of engine details besides cams you already mentioned would be great if you can oblige.

 (I understand you farmed out the motor rebuild to someone else, but any details of any issues or internal upgrades or blue printing?)

The oil filter is also interesting. I am a big supporter of using them for many reasons, sensible to do so IMHO.. But a picture from the top or other side would be interesting.  Who makes it or where sourced?

I realize we have physical constraints for location and proximity, but one FYI using a 90 deg fitting is generally discouraged.  In fluid dynamics it should be avoided as doing the math it can be limiting to flow.
Its been many years since I did the course work but the math was surprising how much right angles can impact flow.  Not a criticism  Just an observation.   

But big thumbs up on your build and sharing it here,  Thank you!

 

[Beeza]

[quote author=Sluggo link=topic=12447.msg98416#msg98416 date=1515448447

The oil filter is also interesting. I am a big supporter of using them for many reasons, sensible to do so IMHO.. But a picture from the top or other side would be interesting.  Who makes it or where sourced?

[/quote]


Oil filter is a Vokes E37, original for this bike from 54. This oil filter along with the 6 fin barrel were the two hardest, nearly impossible parts to find, I did pick up a later model E37 filter along the way (in photo).
There is not much left to recognise the crank as being an A7, and the forged pistons I had made have pushed the comp up to 10.4 to 1. I'll post a pic of the crank, rods and pistons at a later date.
The oil plumbing was a bit interesting to run, those 90 degree bends have a larger internal diameter than the flow union in the cases and there is an SRM oil pump to help push things along. The cases are drilled and tapped to accept this bend and they are period correct for this bike, (they were on the older filter).

Jfligg, the gearing I'm running is E 21, C 43, G 18, R 46, and a Daytona gear box

[Sluggo]

Thank you very much, please do share!  Love stuff like this. 

[Rocket Racer]

Those daytona racebikes were the coolest, I recall Mike Reilly up on the goldcoast has most of one in bits...
those bikes were the inspiration for my race sidecar, although I had a replica frame made as a genuine one would be too precious and fragile to abuse in a rig

those '54 twin port heads cry out for a second 10tt9 !
very jealous

[Beeza]

Hi all, its been a few weeks but here's the latest photo.The oil tank is in now, this is an oil tank I built using the back half of two rigid frame tool boxes (I did use three as i stuffed one up on the first attempt). Im just starting on the oil line plumbing, so I thought while im at it I'll hook up the carbs and float bowls and do the fuel lines at the same time.
Clutch is still not in as I have the wrong clutch center (have early one and need late 6 spring one), finally got a 18T gear box cog, 4 weeks in the mail !
Looking for the two head steady brackets so I can pull down the rocker box and set the gaps, but I'm out of luck, if anyone nearby has a spare pair give me a hoy. Were off to Ballarat swap on Thursday so may be lucky there.
Cheers 

[Greybeard]

Beautiful. Great work!

[CotswoldsA7]

I wholeheartedly agree,lovely images of great work. Just lovely to see it re-emerging.
Best wishes. Chris.

[Beeza]

Hi all, the latest is that I've got the primary drive, final drive, rear brake and chain guard all sorted. Last of the painted parts are off to the painters today and last of the cad plating of screws and bolts is in progress. Hoping to get this bike off the stand and fired up around Easter, then get it to the All British Rally in April.
Cheers.