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by nevhunter
Sat Jul 06, 2019 1:05 am
Forum: Member's Bikes
Topic: The KH Project MK II
Replies: 22
Views: 1954

Re: The KH Project MK II

If that crank has the oil holes coming out in the inside with a single hole it might be a good idea to drill some others in a better place. Feeding oil to a bearing where the pressure is highest due to load ( Centrifugal in this instance) means the oil flow will be impeded or not at all. Later ones ...
by nevhunter
Fri Jul 05, 2019 6:17 am
Forum: Main Chat Forum
Topic: 1930 model G pushrod tubes.
Replies: 11
Views: 225

Re: 1930 model G pushrod tubes.

Why not? There are plenty of shiny ones around.. Nev
by nevhunter
Fri Jul 05, 2019 3:28 am
Forum: Four stroke
Topic: LF 250 - pictures please
Replies: 5
Views: 318

Re: LF 250 - pictures please

Bob, Acme stainless may have dimensions of all that stuff and be able to make it. Nev
by nevhunter
Fri Jul 05, 2019 3:24 am
Forum: Main Chat Forum
Topic: 1930 model G pushrod tubes.
Replies: 11
Views: 225

Re: 1930 model G pushrod tubes.

Clearly that type does rely on the fit. The lower ends are slightly reduced in diameter for a small distance.. You would have to align them to the holes in the aluminium sheet cover as they are a "reasonable" fit. The original breather (oiler??) is clearly in view there. It lets stuff in, ...
by nevhunter
Fri Jul 05, 2019 1:10 am
Forum: For sale/wanted - Bikes
Topic: FOR SALE : 1928 model B
Replies: 7
Views: 296

Re: FOR SALE : 1928 model B

Not too shabby. Good to have the electrics. Is the horn period ? I don't know what was used at that time. Nev
by nevhunter
Fri Jul 05, 2019 12:54 am
Forum: Two stroke
Topic: Journals
Replies: 9
Views: 290

Re: Journals

Fine roger. Might still be worth doing the heat treatment for embrittlement. I found out the hard way with a race motor that didn't even get to be driven, and it was crack checked prior to being hard chromed. It's a common problem in the aviation industry. Even stripping chrome electrolytically need...
by nevhunter
Fri Jul 05, 2019 12:48 am
Forum: Main Chat Forum
Topic: 1930 model G pushrod tubes.
Replies: 11
Views: 225

Re: 1930 model G pushrod tubes.

Yes I've seen both types. my 1930 has the threaded ends. I don't know how the others stay in place, unless they rely on the fit. Nev
by nevhunter
Thu Jul 04, 2019 12:15 am
Forum: Main Chat Forum
Topic: Turning on a mandrel - Loctite?
Replies: 14
Views: 246

Re: Turning on a mandrel - Loctite?

Should be OK in that situation.. Looks like a pretty thick walled bush, which might not have much "give". Where it's going might not be a very smooth surface and hard to get an accurate size for the interference fit. I sometimes make a trial blank out of an old cast iron window weight , pr...
by nevhunter
Thu Jul 04, 2019 12:11 am
Forum: Two stroke
Topic: Journals
Replies: 9
Views: 290

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: 246

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...

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