Author Topic: c11g a/r unit  (Read 1064 times)

0 Members and 1 Guest are viewing this topic.

Offline ianinglis

  • Silver Member
  • ***
  • Posts: 2590
  • Country: england
  • Location: SPROATLEY NEAR HULL EAST YORKS
Re: c11g a/r unit
« Reply #30 on: January 11, 2019, 12:54:12 pm »
yes. surely someone with the right skills should be able to make one of those newer units fit???




ian
BSA C10L 1956 - JFO 588
BSA C10L 1954 - MVE 107
RM6 RALEIGH RUNABOUT
ENFIELD DIESEL KUBOTA OC 95
BSA M21 RIGID RKN 816
CBF 1000
BSA ARIEL 3

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #31 on: January 15, 2019, 04:27:26 pm »
Having a look on Google and can't find any pics of c11g a/r unit, would anyone have a pic taken from front and back of unit?

Hoping to have a go at repairing my unit before getting a replacement cone/shaft done

Thanks Kev
1954 C11g

Offline Ginge

  • Full Member
  • *
  • Posts: 436
  • Country: nz
  • '51 C11 in a '54 C10L frame... "The Bantam Eater"
  • Location: Central Otago
Re: c11g a/r unit
« Reply #32 on: January 18, 2019, 04:17:47 am »
I've got a few old aau's rolling around but nothing that I can guarantee is off a C11G.

Has yours got any numbers stamped on it.

I've got a rare C10 L one but it may be different.  Or maybe not.
Ginge.

Offline timsdad

  • Gold Member
  • ****
  • Posts: 7380
  • Country: england
Re: c11g a/r unit
« Reply #33 on: January 18, 2019, 07:02:07 am »
I don't see why a C10L unit would differ from a C11G/C12, Ginge.

The degrees of advance on any unit wouldn't matter if it was timed up in the fully advanced position. It just needs to fit the taper on the camshaft.


Ray
Just a motorcyclist.

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #34 on: January 18, 2019, 08:36:50 am »
Found a pic on here which hopefully will help with lining up where the cone end of shaft should be
Going to try and braze plate to shaft at weekend, will post some pics after

When my a/r unit fell out of casing there was no springs on it?
Have dropped oil and no springs found, none in side cover either!
Do you think it could have run without them?
It has been off road for last 4 years but prior to that run really well.

Is the c11 units same as pic?

Kev
1954 C11g

Offline timsdad

  • Gold Member
  • ****
  • Posts: 7380
  • Country: england
Re: c11g a/r unit
« Reply #35 on: January 18, 2019, 10:07:29 am »
It wouldn't run very well without springs, Kev, because the bob weights just drift out and dig into the alloy casing. I've had that happen, it felt like piston seizure but I managed to limp home. The springs must have been removed from the points compartment by someone, or perhaps got mashed up to debris, because they can't get back past the seal into the engine.

The distributor a/r units are different but maybe their parts could fit the later C models. If it were mine, I'd use any a/r springs on it that will physically fit and time it up on full advance. The Distributor Doctor may well  be able to supply the correct springs.


Ray
Just a motorcyclist.

Offline Ginge

  • Full Member
  • *
  • Posts: 436
  • Country: nz
  • '51 C11 in a '54 C10L frame... "The Bantam Eater"
  • Location: Central Otago
Re: c11g a/r unit
« Reply #36 on: January 18, 2019, 11:29:11 am »
Best I could do at this late hour Kev, but I'm in the shed working on mine for the next day or so, so if you need more info just PM me or something.


That vernier scales in inches.

Not sure if the photos will show.....

Ginge.

Offline Ginge

  • Full Member
  • *
  • Posts: 436
  • Country: nz
  • '51 C11 in a '54 C10L frame... "The Bantam Eater"
  • Location: Central Otago
Re: c11g a/r unit
« Reply #37 on: January 18, 2019, 11:37:10 am »
...and another one.  Base plate to end of the tapered cone.  Doesn't look accurate in the photo but it is.  Aim for 0.8 of an inch.

Ginge.

Offline ianinglis

  • Silver Member
  • ***
  • Posts: 2590
  • Country: england
  • Location: SPROATLEY NEAR HULL EAST YORKS
Re: c11g a/r unit
« Reply #38 on: January 18, 2019, 06:25:05 pm »
the wipac unit is very rare but the cam that fits on it is even harder to come by - it should fit but the slots in the backplate will have to be altered so it breaks at the right time

if you can afford it i would go with the ELECTREX WORLD unit?????



ian

BSA C10L 1956 - JFO 588
BSA C10L 1954 - MVE 107
RM6 RALEIGH RUNABOUT
ENFIELD DIESEL KUBOTA OC 95
BSA M21 RIGID RKN 816
CBF 1000
BSA ARIEL 3

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #39 on: January 19, 2019, 04:29:49 pm »
Wee update, have dropped shaft/cone off at a machinist to get copied, thought it makes sense whilst it is apart and Winter.
Might be a couple of weeks as done as a favour!
When it comes back will post pics of my attempt at brazing it to backplate.
Many thanks for help and info so far, much appreciated
kev

1954 C11g

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #40 on: January 24, 2019, 05:45:25 pm »
Ok so I feel very lucky indeed, found on ebay (labelled as for a Royal Enfield) a complete a/r unit, all looks good and cone/taper correct!
Only £15 as well 😁
1954 C11g

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #41 on: January 24, 2019, 05:46:58 pm »
Another pic
1954 C11g

Offline kdm

  • Full Member
  • *
  • Posts: 61
  • Country: scotland
  • Location: inverness
Re: c11g a/r unit
« Reply #42 on: January 24, 2019, 05:48:42 pm »
Another
1954 C11g

Online Owen

  • Administrator
  • Gold Member
  • ****
  • Posts: 7731
  • Country: england
  • Solutions not problems
  • Location: Chandlers Ford, Hampshire
Re: c11g a/r unit
« Reply #43 on: January 24, 2019, 05:53:06 pm »
Well done on getting that.
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Anyone want a B20 in need of a lot of tlc