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by nevhunter
Thu Jul 04, 2019 12:11 am
Forum: Two stroke
Topic: Journals
Replies: 9
Views: 319

Re: Journals

I'm surprised you are getting away with chrome and rollers running on it. You normally need a ball race steel for the bushes and a Case hardened nickel alloy steel pin . I've never seen chrome used successfully unless it's a plain bearing running on it. With Chrome you need to heat treat it straight...
by nevhunter
Thu Jul 04, 2019 12:00 am
Forum: Main Chat Forum
Topic: Turning on a mandrel - Loctite?
Replies: 14
Views: 270

Re: Turning on a mandrel - Loctite?

If you have it a tight fit you must allow for the extra size (it all counts ) and will lose it when you remove the bush from the bar. If it slips on the mandrel any runout will be in another direction so you get an eccentric step. If you want inner and outer surfaces to be true to each other you nee...
by nevhunter
Tue Jul 02, 2019 8:50 am
Forum: Main Chat Forum
Topic: Tank colour
Replies: 3
Views: 273

Re: Tank colour

No one seems to be saying much. I've seen plenty that aren't right. Some are too orange It's very nice colour when it is done properly so work at it. Nev
by nevhunter
Mon Jul 01, 2019 2:02 am
Forum: Main Chat Forum
Topic: Black Ariel & sidecar?
Replies: 18
Views: 667

Re: Black Ariel & sidecar?

Many of the "chair"s used in Australia were Locally made and designed and the way they are attached and sprung vary immensely. The more rigid , heavier and wider, generally the better they corner but road shocks are transmitted to the frame a lot more on some than others. I generally would...
by nevhunter
Sun Jun 30, 2019 11:57 pm
Forum: Four stroke
Topic: VH-crank - oil supply
Replies: 24
Views: 734

Re: VH-crank - oil supply

Cut the oil pressure back. It just loads the pump and reduces the flow. Any pressure (say 5 psi) is enough if the spring is controlling it. IF you have none at tickover the pump must be suspect (OR that later gasket) either worn or loose fit (only needs to be at the actual end of the plunger) or the...
by nevhunter
Sun Jun 30, 2019 9:42 am
Forum: Four stroke
Topic: VH-crank - oil supply
Replies: 24
Views: 734

Re: VH-crank - oil supply

The biggest cause of a B/E failure is poor workmanship and having odd sized rollers. Your roller should all come from the one box (batch) and still be checked for being the right size to an exact figure. If you have one slightly large one it will take all the load.. You conrod must be checked for tw...
by nevhunter
Sun Jun 30, 2019 4:53 am
Forum: W/NG Technical
Topic: BH engine
Replies: 2
Views: 146

Re: BH engine

BH is the army one. RBH is the RAF one. An engine could be swapped at any time when the machine was repaired. There's originally a plate with contract number on the rear section of the back mudguard and If you refer to British Forces Motorcycles (the book) you will get dating and delivery details do...
by nevhunter
Sun Jun 30, 2019 4:47 am
Forum: Ariel Talk
Topic: Ariel engine
Replies: 6
Views: 405

Re: Ariel engine

IF it was it would be RBH . I wouldn't worry greatly as those engines were no doubt swapped without concern when repaired.. Nev
by nevhunter
Sun Jun 30, 2019 1:29 am
Forum: Main Chat Forum
Topic: Black Ariel & sidecar?
Replies: 18
Views: 667

Re: Black Ariel & sidecar?

They are not as good as the cast drum brakes for sure. You might play with softer linings and relieve the trailing shoe so it wears quicker and allows the cam to keep operating the other shoe effectively.. I've done that for years where the brakes are less than impressive. With the chair, use your g...
by nevhunter
Sun Jun 30, 2019 1:18 am
Forum: Four stroke
Topic: VH-crank - oil supply
Replies: 24
Views: 734

Re: VH-crank - oil supply

The main thing with the pre 40 ? cover is to have the screwed in adjustable fitting in place. If it's not fitted as a complete unit the oil just goes ported into the timing case so no direct oil to the big end and no pressure to push it to the rockers or oil gauge. The rocker supply normally has it'...

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