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by malcolm.johnson
Tue Feb 12, 2013 1:02 pm
Forum: Main Chat Forum
Topic: Cover girl!
Replies: 9
Views: 1249

Re: Cover girl!

The quietness of the old "noddy bikes" was always a problem to me and a pal in our very early teens in the period 1960-62, wheeling our field bike over the road to ride on some rough parkland. Our answer to PC Burns after he had sneaked up on us, was that we did not need licences or insura...
by malcolm.johnson
Fri Feb 01, 2013 11:48 am
Forum: Four stroke
Topic: Poor quality pattern spares
Replies: 8
Views: 1567

Re: Poor quality pattern spares

I have communicated with Draganfly (which I should have done at the outset) and Roger confirms that the stock of the "sump plates" do need modifying. Aparently most are sold for use as the timing side bearing covers (not needing the recess) and made in house. The stock will be re-machined ...
by malcolm.johnson
Wed Jan 30, 2013 9:16 pm
Forum: Four stroke
Topic: Poor quality pattern spares
Replies: 8
Views: 1567

Re: Poor quality pattern spares

Thanks John, I take your point, but to be totally honest I am fed up with some of the rubbish parts that have come my way restoring other makes and also to many of my aquaintances (and in seemingly in increasing quantities and varieties). Only 2 weeks ago I was sent a speedo bezel with no thread (no...
by malcolm.johnson
Wed Jan 30, 2013 3:25 pm
Forum: Four stroke
Topic: Poor quality pattern spares
Replies: 8
Views: 1567

Re: Poor quality pattern spares

Crankcase filter and bung..JPG
by malcolm.johnson
Wed Jan 30, 2013 3:22 pm
Forum: Four stroke
Topic: Poor quality pattern spares
Replies: 8
Views: 1567

Poor quality pattern spares

During final assembly of my recently rebuilt 4G, on fitting the crankcase inspection plug - a final nip with a spanner left the ring of threads in the crankcase and the cap in my hands. No problem as the threads came out easily and a new billet cap as opposed to the original cast one was obtained fr...
by malcolm.johnson
Sun Jan 20, 2013 8:29 pm
Forum: Four stroke
Topic: IRON 4G PISTON/BORE CLEARANCES
Replies: 7
Views: 1450

Thanks to this forum and Bruce Longman, I am pleased to report that my iron 4g now runs and although not yet used under load, has consumed a few pints of petrol over a number of runnings and seems to be freeing up nicely. I used the =+ 0.060 AE16179 pistons previously mentioned in front bores with 0...
by malcolm.johnson
Mon Nov 19, 2012 1:22 pm
Forum: Four stroke
Topic: IRON 4G PISTON/BORE CLEARANCES
Replies: 7
Views: 1450

I forgot this one and is also about the orientation of components. The connecting rods on my iron 4g are the later with the shell bearings. Are there any thoughts which way round they should be fitted to the crank in relation to the shell indents on rod and cap, which are on the same side of each as...
by malcolm.johnson
Sun Nov 18, 2012 9:27 pm
Forum: Four stroke
Topic: IRON 4G PISTON/BORE CLEARANCES
Replies: 7
Views: 1450

IRON 4G PISTON/BORE CLEARANCES

Following my post back in july re pistons for my iron 4g, that had been bored and little ends re bushed, to take + 040 BMC pistons and then left to rust, I located a set of nos + 060 BMC pistons after months of searching. Got them from Bruce Longman (why did I not try him sooner) together with other...
by malcolm.johnson
Fri Jul 06, 2012 5:08 pm
Forum: Four stroke
Topic: Square 4 pistons
Replies: 6
Views: 1316

Re: Square 4 pistons

Thanks Roy. Standard bore size as you know for the square 4 is 65mm. Some BMC A series engines are 64.5mm, the 0.5mm difference equating to approximately 20 thou. As I see it, even if I use +.060 BMC pistons, I am still at + .040 on the "Ariel" size, leaving another rebore to +.060 "A...
by malcolm.johnson
Fri Jul 06, 2012 3:38 pm
Forum: Four stroke
Topic: Square 4 pistons
Replies: 6
Views: 1316

Square 4 pistons

Hello, this is my first post. Last August I took over a VERY long term project, being a 1947 rigid/teles 4G. This is my first Ariel and now looks like a motor bike again. A good deal of the engineering work such as crank regrinding and reboring had originally been done, but unfortunately the cylinde...

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