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by david.anderson
Thu Jun 20, 2019 12:30 am
Forum: Four stroke
Topic: Lathe user?
Replies: 19
Views: 752

Re: Lathe user?

BSF was also used on Mk2 head bolts/nuts and rocker blocks and VB head bolts. I think Ariel liked to confuse.
David
by david.anderson
Thu Jun 13, 2019 11:18 am
Forum: Ariel Talk
Topic: 57 on singles , return pump check valve in timing cover.
Replies: 8
Views: 440

Re: 57 on singles , return pump check valve in timing cover.

John The raised oil level in the timing chest was an Ariel factory modification. Yes there are clearly leak paths but the path alongside the timing side mainshaft is virtually at the raised level in any case. The ¼” copper pipe that is used in lifting the oil level fits into a ¼” hole. Th oil leak p...
by david.anderson
Thu Jun 13, 2019 10:09 am
Forum: Ariel Talk
Topic: Exhaust blow back
Replies: 8
Views: 301

Re: Exhaust blow back

Keith There are many possible causes. 1/ Are there any exhaust leaks. Not so likely with the clamp over flange iron head 1950 VH but a small leak will do it. Seal the pipe and flange with Maniseal or even silicone rubber will work 2/ is the timing out. If retarded it can backfire. 3/ is it a little ...
by david.anderson
Fri May 31, 2019 5:14 am
Forum: Main Chat Forum
Topic: Returned from Australia
Replies: 35
Views: 882

Re: Returned from Australia

For those that don’t understand Australian slang, in Australia a condom is generally referred to as a raincoat or a French letter.
do not confuse a comdom (A Vincent Commet engine in a Norton dominator frame) with a condom (sorry more aussie humour)
David
by david.anderson
Thu May 30, 2019 10:56 pm
Forum: Main Chat Forum
Topic: Returned from Australia
Replies: 35
Views: 882

Re: Returned from Australia

After Steve’s boomerang comment (good one Steve) I could not help myself with this comment following Adrie’s last post.. So it is now packed in a Dutch raincoats box? Used? Is that the same as a French letter. If so it is bound to be returned again. Sorry Adrie but you may not understand the Austral...
by david.anderson
Thu May 30, 2019 12:29 am
Forum: Main Chat Forum
Topic: Returned from Australia
Replies: 35
Views: 882

Re: Returned from Australia

Biosecurity is a major concern in Australia. There are many diseases that we are free of that could wipe out native flora and fauna, or severely effect agriculture. And as has been previously stated there are also internal border security checks. There are areas within NSW where it is illegal to ent...
by david.anderson
Tue May 28, 2019 11:03 am
Forum: Four stroke
Topic: Removal of gearbox sprocket
Replies: 5
Views: 217

Re: Removal of gearbox sprocket

It is possible to slide the mainshaft out. But you must first remove the gearbox outer cover, partly dismantle the kickstart assembly and gearchange then remove the mainshaft nut. If lucky the mainshaft will slide back in with a little jiggling. Be careful to align the gearchange timing marks on rea...
by david.anderson
Mon May 20, 2019 8:17 am
Forum: Four stroke
Topic: Square Four MkI restoration complete - almost....
Replies: 72
Views: 2157

Re: Square Four MkI restoration complete - almost....

It is actually easier to set the end clearance when the cases are split and you are working with just the timing side case.. One crank at a time into their timing side bearing with nothing to interfere with end float. After assembly you can check, but it more difficult at that stage. There is no pro...
by david.anderson
Sun May 19, 2019 8:33 am
Forum: Four stroke
Topic: Square Four MkI restoration complete - almost....
Replies: 72
Views: 2157

Re: Square Four MkI restoration complete - almost....

Gui As Roger stated the end float in thesquare 4 is controlled by the timing side bush only. Shims are placed over the end of the crank journal. The factory stated end float is 2 – 4 thou. To increase end float a thicker shim is placed between the crank journal and the thrust washer. I would also ch...
by david.anderson
Wed May 15, 2019 10:48 am
Forum: Ariel Talk
Topic: 1952 Ariel 500cc single racing bike
Replies: 10
Views: 431

Re: 1952 Ariel 500cc single racing bike

As Adrie has said it is an alloy head and probably VCH VHA. With a VHA engine number it is most likely that the original alloy cylinder base flange cracked with high compression and has been replaced with the iron cylinder. Lucas Wader magnetos were also fitted to competition Ariels.The rear wheel i...

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