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Dave

2024-06-11, 20:02:05
Have you tried the new Drafts feature yet? I just lost a long message today and learned my lesson. It is a good idea to save a draft of any long post you are writing. You can then just keep writing and keep saving a draft, knowing you have a backup if there is a glitch. The draft is automatically deleted when you post the message.

Dave

2024-06-08, 18:30:04
For Sale
xman has two very nice 1950's machines available - a green 1950 mk4 and black 1951 mk5 - both in good condition and running well.

Dave

2024-06-07, 02:13:36

Dave

2024-06-03, 08:23:05
For Sale
Duncan has just listed his green and cream 1957 Dragonfly for sale with spares and documents.

Dave

2024-06-02, 08:34:05
Parts avalable
alistair still has parts available - barrels, carburettor, castings - see all listings.


Dave

2024-06-01, 18:33:27

Dave

2024-05-28, 00:09:46
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Flywheel extractor for 750cc Mastiff

Started by Dewey, 07 Jul 2016 at 23:01

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Dewey

I'm just about finished with this engine rebuild and thought of all the most useful tools to include at delivery time would be the means to remove the flywheel. I followed Chris's lead with the EW designed extractor and first assumed the flywheels internal thread to be the same - NOT! Firstly, the flywheel internal threads were what looked like 20 TPI, so I turned one out at 1 7/16" - 20. Nope, too small. Turned another at 1 1/2" - 20 - too big! Thru careful measurements of the thread ID and adding thread depth I discovered it to be a 38 x 1.25mm, which is only .010" less than 1.5". This may fit the S6 family too.




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eddie

#1
On the S6 the flywheel nut is flanged and the flywheel is fitted with a retaining ring that traps the nut. Unscrewing the flywheel nut then extracts the flywheel without the need for a puller.
  Regards,
                Eddie.

Dewey

That would be too easy. The nut does in fact have a flange but there's nothing in the way of a snap ring or a groove for one in this case so the tool was absolutely necessary.

eddie

The retaining ring is threaded and screws into the thread you are using for the puller.

  Eddie.

Dewey

Yes, true, but the nut with the flange is much bigger than the hole in the retaining ring in this case so there's no way to grasp the nut to back it out forcing the flywheel to release.