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by malcolm.johnson
Thu May 23, 2019 12:16 pm
Forum: Forum Help
Topic: Topic symbols
Replies: 0
Views: 28

Topic symbols

On the left hand side of most topics there is a circle with horizontal lines, occasionally moving, sometimes red, sometimes blue and my last post unusually has a small red star. What does all this mean?
by malcolm.johnson
Tue May 21, 2019 9:24 pm
Forum: Four stroke
Topic: NH main bearings.
Replies: 3
Views: 130

Re: NH main bearings.

6. Alloy barrel and piston (2).jpg If I could trouble you and ask another couple of questions about this engine, which came with some assorted singles parts. Firstly it came with the pictured unused aftermarket alloy barrel and piston still covered in protective grease, in which the stud hole betwe...
by malcolm.johnson
Sun May 19, 2019 8:56 pm
Forum: Four stroke
Topic: NH main bearings.
Replies: 3
Views: 130

NH main bearings.

I am currently rebuilding an engine from a 1958 NH. The timing side main bearing is exactly the same as the outer drive side main bearing and the inner drive side bearing with a separating spacer is larger. All three are ball races. I have been told that this is incorrect as the larger drive side be...
by malcolm.johnson
Tue Mar 12, 2019 8:36 pm
Forum: Ariel Talk
Topic: Square 4 side stand
Replies: 4
Views: 197

Re: Square 4 side stand

If your friend likes DIY, look at my post of August 2011 detailing my home made stand for a Square 4. It works very well like any modern side stand and is quite simple and cheap to make, plus I feel it is more user friendly than the original offering. Hardly visible too.
by malcolm.johnson
Fri Mar 08, 2019 8:59 pm
Forum: Main Chat Forum
Topic: Cleaning out fuel tank of Sq 4
Replies: 8
Views: 549

Re: Cleaning out fuel tank of Sq 4

My Square 4 had a liner that was gradually dissolving into the fuel and hence carburettor, as well as flaking off the inside of the tank. I removed my liner using MEK (methyl ethyl ketone) and the resultant pile of debris is pictured below. 6. Removing old liner.JPG The next phase included an acid r...
by malcolm.johnson
Sun Feb 10, 2019 9:09 pm
Forum: Four stroke
Topic: PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR
Replies: 5
Views: 408

Re: PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR

Hi Mick, I have had a quick look and here is a picture of the mag/dyno of my Sq4 I recently rebuilt. Probably not the correct finish, but the dynamo body and the two straps are done in ZG90 spray. I once did the iron hubs off an A10 before building the wheels and when done they looked like bead blas...
by malcolm.johnson
Sat Feb 09, 2019 8:52 pm
Forum: Four stroke
Topic: PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR
Replies: 5
Views: 408

Re: PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR

A favourite of mine is ZG90 "galvanize" spray. Looks good, dries quickly and very durable even when treat to a spannering! Couple of coats direct to bare metal.
by malcolm.johnson
Wed Jan 30, 2019 8:56 pm
Forum: Four stroke
Topic: Lycette pattern pillion seat
Replies: 1
Views: 195

Re: Lycette pattern pillion seat

39. Finished and running. (2).JPG I have just fit a riders sprung saddle on my 4G project from the same people. Although disappointed with it, I have to say they are slightly better made than the "indian" models (theirs are Taiwan I think), but about 20% more expensive and just as inaccur...
by malcolm.johnson
Mon Jan 14, 2019 11:50 am
Forum: Main Chat Forum
Topic: Fit Oil pressure gauge to Huntmaster
Replies: 12
Views: 647

Re: Fit Oil pressure gauge to Huntmaster

There could be a simple solution to knowing that you have oil pressure, by replacing the oil pressure release valve with a Triumph pattern with a pressure button indicator built in. SRM make prv`s new for BSA and I assume would fit the Ariel twins too, without the pressure indicator button and for T...
by malcolm.johnson
Wed Dec 12, 2018 10:38 am
Forum: Four stroke
Topic: 4G Conrod Advice
Replies: 23
Views: 1411

Re: 4G Conrod Advice

Strange that. Are the crankcases which house white metal rods not worth protecting by this exchange incentive. Isn`t the scheme designed to save ALL crankcases, regardless whether they are 1939 or 1948, which are identical as far as I can tell?

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