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by nevhunter
Wed May 22, 2019 3:46 am
Forum: Four stroke
Topic: 1939 RH 'R' stamping
Replies: 17
Views: 460

Re: 1939 RH 'R' stamping

I have no idea whatsoever about the "R" on the Ariels. cases.. Military Matchless got extra numbers etc stamped on them every time something was done to them. Interestingly the other day I found a "small" regulator with "LEAD ACID" clearly stamped on it's base. As a mer...
by nevhunter
Wed May 22, 2019 3:37 am
Forum: Main Chat Forum
Topic: What is the best setup for brazing/heating
Replies: 21
Views: 367

Re: What is the best setup for brazing/heating

IF you are doing a lot of "free flowing wick in brazing" larger softer flames are better Use multiple torches and pin the joints to locate them accurately. that's how most of them were done at the factory The brass alloy used was called "spelter" came in thin sheet or coarse powd...
by nevhunter
Tue May 21, 2019 12:44 am
Forum: Four stroke
Topic: 1939 RH 'R' stamping
Replies: 17
Views: 460

Re: 1939 RH 'R' stamping

Funny they have the same part number. The VA, VB has an extra hole for oil to drain from the tappet area. VA VB VG VH of the period all share the same engine prefix. Nev
by nevhunter
Tue May 21, 2019 12:34 am
Forum: Main Chat Forum
Topic: What is the best setup for brazing/heating
Replies: 21
Views: 367

Re: What is the best setup for brazing/heating

Keep your acetylene pressure in the safe range. It's unstable when not dissolved in acetone or similar. There are safety issues with oxy acetylene but it's very versatile and essential for a broad range of uses Look after your equipment and hoses and have regulators that don't creep. I use it a lot ...
by nevhunter
Sun May 19, 2019 11:33 pm
Forum: Four stroke
Topic: NH main bearings.
Replies: 3
Views: 118

Re: NH main bearings.

Compared to the set up on most other engines this is completely adequate even for the VH engines unless modified severely. Corrosion of races in little used bikes is the biggest problem. Few people wear them out. Use a high duty ball race not just anything cheap. Nev
by nevhunter
Sun May 19, 2019 3:10 am
Forum: Ariel Talk
Topic: 29 forks
Replies: 4
Views: 140

Re: 29 forks

Don't think it's from the factory. More likely a headlamp support or stirrup/double front brake arrangement. Nev
by nevhunter
Sun May 19, 2019 3:03 am
Forum: Four stroke
Topic: Straightening twisted handlebar bracket
Replies: 13
Views: 321

Re: Straightening twisted handlebar bracket

These parts are not brittle and are generally with original parts of pretty good quality and reliable unless you do something like welding with electric arc where you can get a chilling and local hardening at the edge of the weld where it cools too quickly. If it bends with a certain action (force) ...
by nevhunter
Sat May 18, 2019 11:39 pm
Forum: Four stroke
Topic: Straightening twisted handlebar bracket
Replies: 13
Views: 321

Re: Straightening twisted handlebar bracket

it's more twisted than bent. It will have deformed at the thinnest section parts I e the middle area of the "U" and where the curved yellow arrow is and where the black arrows are near the bolted anchor points.. Take the middle twist out first then you can align the clamped ends so the sil...
by nevhunter
Fri May 17, 2019 1:11 pm
Forum: Four stroke
Topic: Square Four MkI restoration complete - almost....
Replies: 67
Views: 1490

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

I think that's the way it's intended to be done. it's trapped and not able to be damaged, Unless you have bevel gears involved end float is not that critical unless it's not enough. Preloaded tapered rollers have none usually. The preload is part of the design concept. Nev
by nevhunter
Thu May 16, 2019 9:11 am
Forum: Four stroke
Topic: VB head gasket
Replies: 11
Views: 260

Re: VB head gasket

I use an engine aluminium paint on both sides of the gasket. VHT brand. Especially good with solid gaskets . I have given up heating the old gaskets red hot long ago. They buckle and crater. Just clean the surfaces carefully (solvent and steel wool) apply and wait till touch dry( about 30min) Retens...

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