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by nevhunter
Mon Apr 23, 2018 8:11 am
Forum: Ariel Talk
Topic: Ewarts plunger type
Replies: 3
Views: 139

Re: Ewarts plunger type

5050-30 is the same as fitted to the 30 model AND also the Military bikes which puts your bike 5 years (approx.) from either. I've checked both bikes with original taps fitted & they appear to be identical . I really don't know for sure about the SQ4, but the only taps I've found with a lock on ...
by nevhunter
Sun Apr 22, 2018 12:47 pm
Forum: Ariel Talk
Topic: bigend oil holes in KH crank
Replies: 7
Views: 221

Re: bigend oil holes in KH crank

Modern oils will keep particles in suspension more than the oils available at the time. The centrifugal forces when a crank is rotating will tend to separate out the particles like in a milk separator. An oil hole limits the level which to will go to. (the sludge build up) There's no reason why it s...
by nevhunter
Sun Apr 22, 2018 1:26 am
Forum: Main Chat Forum
Topic: Exhaust heat shield
Replies: 17
Views: 228

Re: Exhaust heat shield

Your battery being drained has nothing to do with starting. The magneto is separate in function. Retension the rocker boxes and reset tappets fairly soon after putting a bike on the road. The thick gaskets compress a bit till they settle in. Nev
by nevhunter
Sat Apr 21, 2018 12:30 am
Forum: W/NG Technical
Topic: Oils for 1942 W/NG
Replies: 8
Views: 280

Re: Oils for 1942 W/NG

According to the W/NG factory Book, 2and 1/2 inches below filler orifice. Add grease to the oil constantly mixing till it thickens but still just runs at normal temperature. I don't know the proportions as it varies with the ingredients you use. Use a gear oil and a high temp grease . Some greases a...
by nevhunter
Thu Apr 19, 2018 11:39 am
Forum: W/NG Technical
Topic: Oils for 1942 W/NG
Replies: 8
Views: 280

Re: Oils for 1942 W/NG

Get a battery drill and fashion a type of crude egg beater set up. Keep it warm and it will pour. Has to be thin enough not to channel. Check it by running in a gear on the rear stand if you are worried about where it ends up level wise. Nev
by nevhunter
Thu Apr 19, 2018 1:23 am
Forum: Ariel Talk
Topic: bigend oil holes in KH crank
Replies: 7
Views: 221

Re: bigend oil holes in KH crank

It might have been modified. When I was at University in Sydney the lecturer in an engineering subject stated the oil holes in the Ariel SQ4 and Twin were not in the correct or optimum place. This was in a theory of lubrication topic and I would have no difficulty believing what was said was correct...
by nevhunter
Tue Apr 17, 2018 11:27 pm
Forum: For sale/wanted - Parts
Topic: NH piston 9:1 ?
Replies: 2
Views: 102

Re: NH piston 9:1 ?

It's as high a top as I've seen. It's not a good shaped combustion chamber with a crown that high. Nev
by nevhunter
Tue Apr 17, 2018 11:24 pm
Forum: Four stroke
Topic: Doorstop or Repairable Cylinder Head?
Replies: 3
Views: 148

Re: Doorstop or Repairable Cylinder Head?

It's damaged in an area that is hard to repair. The correct repair would be cast iron weld but it's a job most people won't take on and likely to crack when cooling post weld If it still works as it is (and it probably will), use it it and look for a replacement rather than spend money on it. They a...
by nevhunter
Tue Apr 17, 2018 11:12 pm
Forum: Ariel Talk
Topic: Information on Cylinder Head
Replies: 10
Views: 241

Re: Information on Cylinder Head

I would expect Ariel knew what they were doing. The very hot area around the exhaust port would probably result in rapid carbon build up of the oil feed holes in head and guide. Drilling a head where there are no reinforcing bosses will weaken the metal in that area making it easier to crack when in...
by nevhunter
Mon Apr 16, 2018 11:36 pm
Forum: Four stroke
Topic: Breather puffing oil out
Replies: 10
Views: 243

Re: Breather puffing oil out

Your return oil should have some air in it after a while. The scavenge pump is bigger than the supply one.to ensure the sump doesn't have oil retained in any real amount. If you have a lot of fumes you have blowby which is from the piston and perhaps the exhaust guide.. Nev

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