What have you done with your bike/s today?

[paintingsteve123]

Hi guys,
It was a bit fiddley but the cord rings were put on, and the barrel put back on.
Had a mate around to help as it turned out to be a two handed job.
The problems really began when I went to put the cam pinion gear back.
Spent about an hour searching for the wodruff key, after I dropped it , had a magnet on a stick and dustpan and brush
How could such a small thing bounce 3 foot under a work unit.
Glass of wine now while watching the rugby, .

[Worty]

Was very angry with myself after dropping a rocker inspection cover washer down the pushrod tunnel.  Was tempted to leave it there in a fit of rage, but was convinced by others that this wasn't a good idea.  Head off and a hooky thingy to get it out (which was simple).  What has never been simple for me is getting the pushrods back into the rocker cups, until Colsbeeza came up with the idea of clamping the comb in place - made it A LOT easier.

You're right about things bouncing.  Reckon half the bike's been under my workbench at some point.

[muskrat]

G'day Steve.
Yes gravity is like a magnet to small parts and surprising how far they bounce.
How far into the bottom end did you go?
Here's the link to my plunger rebuild. https://www.a7a10.net/forum/index.php?topic=16831.0
Cheers

[Swarfcut]

  Steve's is an early model, and as such does not have the cast in oilway that runs up from the PRV to the cam trough that came in 1952/53.  It will also not have an oileal on the crank drive side. This is an easy way to tell the types apart in poorly described ebay listings or on the hoof at a jumble. Good picture, not often seen for comparison.

 Lucky fella, working with nice clean internals that look to have had some TLC. Camshaft key is a swine, sometimes displaces as the gear is pushed on, making a nice gouge in the face of the cam bush. Cam will have a little bit of endfloat at this stage of assembly, the breather cork chosen (or flatted down) needs to be thick enough to be compressed slightly with the cover on, but not so thick that the breather sleeve is under a great load against the timing cover. Yup, guilty as charged, inexperience of youth. Needs to be a good airtight seal between breather and cam gear for the system to work properly, so thickness of the cork is important.

  All assembled, you should have a cam that turns easily, with no endloat.

 Swarfy.

[paintingsteve123]

I had bush, bearing, regrind. Polished con rods, sludge trap cleaned with new hex end caps.
New cam with bushes.
I also had the cases vapour blasted by a local chap before sending it to SRM.
Now you've mentioned it it was a real pig to get the cam gear on, with regards to that woodruff key. And yes I did slightly damage the end of the bush , but managed with a tiny file to fix it..
Also big ends , small ends and a new seal where the gear box shaft comes through

[trevinoz]

Swarfy,
The oil passage was introduced prior to 1952. My 1951 cases have it, two sets.
I have re-built a 1950 engine and it didn't have it.

[JulianS]

It is on service sheet 201 - the modification was added after engine ZA7 4712.

[Swarfcut]

 Thanks Trev, serves me right for not checking with Roy Bacon. I lumped the two mods together, error on my part there folks, sorry.

 Swarfy.

[Sav]

First ride for six months, since I got cautious clearance from the eye consultant.

Just a gentle 10 miles around the lanes on the trusty A7SS.

Nervous at first but great to be back on two wheels

[Worty]

First ride for six months, since I got cautious clearance from the eye consultant.

Just a gentle 10 miles around the lanes on the trusty A7SS.

Nervous at first but great to be back on two wheels

Great to hear Sav, that first ride can be daunting!

[CheeserBeezer]

I was shuffling the bikes around the garage and noticed a streak of petrol under the silver A10. Obviously fuel was running out of the bike from somewhere underneath. Seems I'd left the fuel tap switched on and fuel and leaked down into the crankcase. So I removed the sump plate to release about two litres of petrol! Lucky I hadn't tried to start it!

[Worty]

I was shuffling the bikes around the garage and noticed a streak of petrol under the silver A10. Obviously fuel was running out of the bike from somewhere underneath. Seems I'd left the fuel tap switched on and fuel and leaked down into the crankcase. So I removed the sump plate to release about two litres of petrol! Lucky I hadn't tried to start it!

This is it CB, fuel tap on, crankcase full of petrol, oil tap off, crankcase full of nothing, both engine wreckers

[Black Sheep]

Decided to appease the vengeful rain gods and put the badger nose screen on the Star Twin. The sun came out and it was hot, dry and sunny yesterday. That screen is staying on - not tempting fate any further.

[Macbeth]

I split up with my rather expensive 360 cam & mount 🤣

[Joolstacho]

So... Macbeth... what does that actually mean?