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by david.anderson
Sun Jul 21, 2019 3:11 am
Forum: Four stroke
Topic: Lodge H14-S
Replies: 11
Views: 199

Re: Lodge H14-S

Charles said “We're all just 13-year old boys, aren't we?...” Yes, and I wouldn’t have it any other way. While women may recognise that fact, they appear unable to accept it. Wade Courtesy of Draganfly. Just need to look up your part numbers first. https://www.draganfly.co.uk/data/pdf/Valves.pdf David
by david.anderson
Sat Jul 20, 2019 9:06 am
Forum: Four stroke
Topic: clutch and mainshaft
Replies: 46
Views: 854

Re: clutch and mainshaft

I can also say that I first drilled all my clutch basket bolt heads about 40 years ago and wired them and have never had a problem. I have done that with all my subsequent bikes. But my question is did Ariel ever use the 2 hole tab washer or is that a modern replacement. All that I have seen are the...
by david.anderson
Sun Jul 14, 2019 8:53 am
Forum: Four stroke
Topic: clutch and mainshaft
Replies: 46
Views: 854

Re: clutch and mainshaft

The easiest way to tighten the engine sprocket (and half time pinion nut) is a bar (in this case a socket extension piece) through the conrod resting on a couple of bits of timber
David
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by david.anderson
Wed Jul 10, 2019 5:29 am
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 496

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Brenton The venturi mentioned above is part of a quote from the Roland Pike autobiography. The venturi is a 22 degree reduction in the port size down to 80% of the carburettor throat size, followed by a 7 degree increase in size until the port size is re-established. I do run the venturi on one of m...
by david.anderson
Tue Jul 09, 2019 4:45 am
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 496

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Unfortunately there is far more to horse power than flow numbers. Gas velocity is very important and is the main driver of cylinder filling. Gas velocity in large ports is slow. Large ports may (but not necessarily) produce more power at maximum revs as the gas velocity builds up but are often down ...
by david.anderson
Sun Jul 07, 2019 8:46 am
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 6
Views: 281

Re: sq 4 oil pressure....

Bob I initially fitted my mk2 with a 100psi gauge with the Morgo. That gauge showed a constant 50psi oil pressure at idle or speed. That gauge died so I fitted a 60psi gauge. It goes off the scale when the bike is first started but then comes back to show about 40psi with a hot idle or 50-55psi at s...
by david.anderson
Thu Jun 20, 2019 12:30 am
Forum: Four stroke
Topic: Lathe user?
Replies: 19
Views: 901

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: 511

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: 12
Views: 630

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: 1067

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

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