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by nevhunter
Mon Jan 22, 2018 7:29 am
Forum: Four stroke
Topic: HS/HT/BY valve springs
Replies: 5
Views: 90

Re: HS/HT/BY valve springs

Without getting too technical I wouldn't see a seated pressure of much over 100 lbs as desired unless you are racing. Progressively wound springs are less likely to develop a harmonic surge in the spring. Springs are like other weights in the valve train . Keep things as light as possible (like spee...
by nevhunter
Fri Jan 19, 2018 10:58 pm
Forum: W/NG Restorations
Topic: 1942 W/NG
Replies: 9
Views: 97

Re: 1942 W/NG

The horn should be mounted at the front. I have new repro fittings for that. (2 pieces) The tapered handlebars are a work of art. Is the "field stand" fitting still on the frame? Nev.
by nevhunter
Thu Jan 18, 2018 7:25 am
Forum: Ariel Talk
Topic: NH350 sprinter - latest
Replies: 16
Views: 319

Re: NH350 sprinter - latest

The originals are getting expensive. (Like ARIEL Girders). Nev
by nevhunter
Thu Jan 18, 2018 2:21 am
Forum: Ariel Talk
Topic: NH350 sprinter - latest
Replies: 16
Views: 319

Re: NH350 sprinter - latest

It's a twin inner case. with spacer. Nev
by nevhunter
Wed Jan 17, 2018 12:16 am
Forum: Ariel Talk
Topic: NH350 sprinter - latest
Replies: 16
Views: 319

Re: NH350 sprinter - latest

It might have a grease nipple fitted to the cush drive. Nev
by nevhunter
Tue Jan 16, 2018 12:04 pm
Forum: Member's Bikes
Topic: The new Project
Replies: 32
Views: 2340

Re: The new Project

It's a general comment. Staked into the thread means the damaged part damages the thread as it's unscrewed unless all damaged thread is removed (eased away) before unscrewing. People do it an many parts of motors. Nev
by nevhunter
Tue Jan 16, 2018 7:13 am
Forum: Four stroke
Topic: Black Ariel engine balance factor
Replies: 16
Views: 451

Re: Black Ariel engine balance factor

Not with ARIELS of course, but you can occasionally get some pretty OFF flywheels and just balancing the" assembly" would leave some serious "offset" errors possible. I always drill from the inside faces as the factory does for looks so they have to come apart a few times. You ju...
by nevhunter
Tue Jan 16, 2018 7:03 am
Forum: Ariel Talk
Topic: Original spark plug
Replies: 7
Views: 186

Re: Original spark plug

The D-16 is the usual size (outside) not reach, which is different matter. The D-14 is colder and much larger in the insulator externally and more expensive. I'm surprised they make these thread sizes at all. The D-16 is a good all round plug for just about any of the 18 mm bikes but if you go hard ...
by nevhunter
Tue Jan 16, 2018 2:01 am
Forum: For sale/wanted - Bikes
Topic: WNG special
Replies: 7
Views: 187

Re: WNG special

The forks are Vintage Harley Davidson. A "copy" on the brough's was known as "CASTLE " forks which had extra dampers and the name CASTLE cast into the fork bridge. The "special" Sturmey box was a stronger mainshaft (extra diameter through the sleeve gear), and the bronz...
by nevhunter
Tue Jan 16, 2018 1:44 am
Forum: Four stroke
Topic: Black Ariel engine balance factor
Replies: 16
Views: 451

Re: Black Ariel engine balance factor

yes you have to make up a special weight or heavy dummy crankpin. for a single built up crank. The Vertical twins should be dynamically balanced because of their width and indefinite shape. You need 2 special weights for them that fit on the crankpins and have the centre of mass as the crankpin cent...

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