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by nevhunter
Fri Oct 28, 2011 12:40 am
Forum: Ariel Talk
Topic: Forged verses cast flywheels
Replies: 8
Views: 1218

there are many grades of cast iron, ranging from stuff just like in fire grates to SG and nodular iron that is good enough to use in diesel crankshafts and can be nitrided for wear.( This is not a matter fpr consideration with the built-up wheels that we use.) Steel wheels can be around 3 times stro...
by nevhunter
Wed Oct 26, 2011 11:49 am
Forum: Four stroke
Topic: BA gearbox speedo gearing
Replies: 13
Views: 2233

Don't all 350's use a CP box? Even some 500's use it including the VCH which was offered with the option of the CP. "being perfectly suitable" etc according to the brochure in 1949. This is not the whole issue as there are varying ratios on the worm on the end of the layshaft. (which is pr...
by nevhunter
Wed Oct 26, 2011 11:42 am
Forum: Ariel Talk
Topic: nearly finished
Replies: 19
Views: 2622

Just couldn't help myself keith. You need a sense of humour in this world otherwise you will go crazy. Nev.
by nevhunter
Wed Oct 26, 2011 11:39 am
Forum: Four stroke
Topic: Rear stand alignment
Replies: 13
Views: 2050

Nickel bronze is an excellent material for butt welding most metals. The usual precautions. Don't overheat it. The bronze is as strong as the original metal. (except the chrome moly steels which should be welded with the correct rods and heat treated afterwards to achieve maximum strength). Nev
by nevhunter
Wed Oct 26, 2011 4:06 am
Forum: Ariel Talk
Topic: nearly finished
Replies: 19
Views: 2622

I'll skip meeting you in the flesh thanks. I'll confine my admiration to the bike. The motor would be a 500 with the thick cylinder base. Perhaps the head is painted silver? Nev
by nevhunter
Wed Oct 26, 2011 4:01 am
Forum: Ariel Talk
Topic: Forged verses cast flywheels
Replies: 8
Views: 1218

A badly shaped port will often work worse when polished, than when it was rough. The reason. Boundary layer control, particularly on the inside of the curve. A dimpled golf ball travels further than a plain shiny one for the same reason, The exhaust port is less important because hot gasses are much...
by nevhunter
Tue Oct 25, 2011 6:09 am
Forum: Four stroke
Topic: Rear stand alignment
Replies: 13
Views: 2050

Being just a "U" shape you shouldn't have to cut it. Each part should be straightened (shaped to original) and then align it by twisting the tube part. I have just had a look ar 3 of them. The RHS with the spring and stop, is curved in the top portion. The left is straight. These are from ...
by nevhunter
Mon Oct 24, 2011 11:58 pm
Forum: For sale/wanted - Bikes
Topic: Wanted parts for 1952VB
Replies: 4
Views: 1188

Not so funny. Around 1930 they were like that. Had SV type tappets and no adjusters on the valves. IF ANYONE has some spare rockers for a 1930, I am using the adjustable type as I don't have any of the originals. Nev
by nevhunter
Mon Oct 24, 2011 11:50 pm
Forum: Ariel Talk
Topic: nearly finished
Replies: 19
Views: 2622

Starting first kick should almost be a formality. Nev
by nevhunter
Mon Oct 24, 2011 11:47 pm
Forum: Four stroke
Topic: crankshaft assembly mystery
Replies: 12
Views: 2161

What adrie says is correct John. My belief (and practice ) is to line the hole up by eye and leave the locator pin out of the crankpin. Once it is assembled it won't move ( unless something quite horrendous happens).. AJS pins are done this way and probably many others. Nev

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