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by Brian.Fosh
Sat Nov 25, 2017 12:36 pm
Forum: For sale/wanted - Bikes
Topic: 1951 Mk1 for sale .. PX considered £2.5k leader or VB etc
Replies: 0
Views: 419

1951 Mk1 for sale .. PX considered £2.5k leader or VB etc

Well, I need the cash so I've put the Mk1 on ebay for £12,800., https://www.ebay.co.uk/itm/152794440865?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 It has everything needed to make it showroom reliable to my own satisfaction, this bike left the factory Feb 5th 1951 and was sold through t...
by Brian.Fosh
Mon Oct 16, 2017 10:39 pm
Forum: Four stroke
Topic: mk 2 square four- piston crown height
Replies: 15
Views: 1150

Re: mk 2 square four- piston crown height

Hi, I never had any protrusion but I had used an extra thicker base gasket in expectation... I stuck one of Drags paper-thin gaskets on to a piece of stout gasket material and then cut out the shape. Most metal had come off the head in my case, rather than barrel, because the toolmaker struggled at ...
by Brian.Fosh
Sun Oct 15, 2017 11:53 pm
Forum: Four stroke
Topic: mk 2 square four- piston crown height
Replies: 15
Views: 1150

Re: mk 2 square four- piston crown height

Hi, I went through similar this year using IMD's in a '51 mk1 with skimmed head and barrel. I'm really pleased with IMD. I went through quite a bit of torture with the newly built engine missing after long gentle runs. In the end, it was simply down to the plug temperature from running a much (much)...
by Brian.Fosh
Tue Sep 26, 2017 9:38 pm
Forum: Member's Bikes
Topic: My 1951 NH Red Hunter Project
Replies: 42
Views: 4065

Re: My 1951 NH Red Hunter Project

Hi, For info, My '51 Sq4 had a chrome tank. The works dispatch ledger is held at the VMCC library (Draganfly have a copy and dated my bike ). It showed by frame & Engine number that mine left the factory Feb 5th 1951. Also, announced by "The Motor Cycle" 8th Feb 1951, p145, referring t...
by Brian.Fosh
Sun Sep 24, 2017 10:24 pm
Forum: Four stroke
Topic: Primary drive - judder on transmission
Replies: 5
Views: 681

Re: Primary drive - judder on transmission

Hi Only for info, The later shock absorber protects the splines with a splined sleeve and fits earlier crankshafts. I recall drags website explains the interchangeability. I'm using an early rear crankshaft from an iron 4G, as yours with a lock-washer flat, on my '51 mk1 but use the later splined sl...
by Brian.Fosh
Sun Sep 10, 2017 1:24 pm
Forum: Ariel Talk
Topic: mufflers needed
Replies: 4
Views: 698

Re: mufflers needed

This Guy on ebay has been trying to sell these for at least a year, possibly more... :lol: I've been minded to buy them for the $10 asking price and ask him to throw them in the trash for me :idea: http://www.ebay.co.uk/itm/1953-ARIEL-SQUARE-FOUR-4G-MKII-PLUNGER-1000CC-OEM-EXHAUST-MUFFLER-/251967235...
by Brian.Fosh
Tue Sep 05, 2017 11:42 pm
Forum: Four stroke
Topic: "F" cylinder wall mark
Replies: 11
Views: 780

Re: "F" cylinder wall mark

I struggled similarly with a BSA sloper regularly seizing after initial rebuild, despite original bore and piston. Running richer really helped. e.g a slide with a 1/16" less cutaway. I liked the Brass carb so persevered but I have heard only good things from people fitting newly-made Amals. Af...
by Brian.Fosh
Sun Aug 27, 2017 12:20 am
Forum: Four stroke
Topic: Mk1 - Full engine dismantle
Replies: 9
Views: 786

Re: Mk1 - Full engine dismantle

Hi, I wanted to use a dished set of NOS dished Pistons in my MK1, probably intended for a cast-iron 4G but Drags liners proved exact size for IMD std pistons with only enough extra metal for honing, and alas around 3-4 though thou too big for my dished pistons. So I went for the IMD pistons in a hur...
by Brian.Fosh
Tue Aug 22, 2017 9:52 pm
Forum: Main Chat Forum
Topic: Square four 1000 4G
Replies: 8
Views: 916

Re: Square four 1000 4G

They are not so complex really, and rebuilding from running condition is relatively straightforward. My 1500 mile rebuild took about 3 months of mixed feelings... ;) - 1 week of evenings and a weekend of re-assembly tasks, :) - a few minutes of discovery that the face seal spring had detached and on...
by Brian.Fosh
Sun Aug 20, 2017 11:58 pm
Forum: Four stroke
Topic: MK11 square re-build do`s and don`ts!
Replies: 29
Views: 3045

Re: MK11 square re-build do`s and don`ts!

I'm satisfied the oil filter is well worth fitting. My oil stays golden coloured, with no blackening at all. If I gave the impression it was debris holding the mk1 ball off its seat, that is not what I intended. I don't think my crank-end valve was being held open by muck. I think it was possibly an...

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