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by nevhunter
Mon Dec 10, 2018 10:07 pm
Forum: Four stroke
Topic: 4G Conrod Advice
Replies: 10
Views: 266

Re: 4G Conrod Advice

The choice is yours. You have no way of knowing the history of the rods in your motor, and you have no way of determining the fatigue state of them. You can have them crack checked but that's not particularly assuring with an alloy rod which does have a definite life. As I said in another post JAP s...
by nevhunter
Sun Dec 09, 2018 7:29 am
Forum: Four stroke
Topic: BSA Conrod in a 4G?
Replies: 8
Views: 283

Re: BSA Conrod in a 4G?

They don't run the same balance factor as many other motors as the opposing rotation of the geared cranks cancels out a lot of forces other engines have to address for smooth running. As with all engines though, The correct factor must be known and applied even IF you have the best dynamic balance e...
by nevhunter
Sun Dec 09, 2018 7:28 am
Forum: Four stroke
Topic: BSA Conrod in a 4G?
Replies: 8
Views: 283

Re: BSA Conrod in a 4G?

Deleted by poster. Duplication.
by nevhunter
Sun Dec 09, 2018 7:21 am
Forum: Member's Bikes
Topic: My 4G Restoration Blog
Replies: 74
Views: 5147

Re: My 4G Restoration Blog

That camshaft has been running displaced one way. It has an unworn section on the same side of each cam. While this hasn't directly caused all the wear it doesn't help longevity of the shaft if a it can be assembled this way . The camshaft lobes are one of the most critically lubricated parts or mos...
by nevhunter
Sun Dec 09, 2018 7:01 am
Forum: W/NG Technical
Topic: Oil pump piston leaks
Replies: 2
Views: 68

Re: Oil pump piston leaks

Someone may have had them copper plated to rectify the wear. They are made of steel. If there's any slack you can actually see, it's worn too much. It only needs the end to be worn and it won't pump reliably especially when hot. Some of the springs that seat the balls that are supplied are not corre...
by nevhunter
Fri Dec 07, 2018 10:18 pm
Forum: W/NG Technical
Topic: Ariel Rear Stand Id
Replies: 7
Views: 183

Re: Ariel Rear Stand Id

A lot of bikes of that period were two pipe and upswept so the legs are straight. The RH with a low pipe has to have a more defined curve on the RH (with spring) side, starting close to the top to clear the muffler.. It should bend OK . The1941 W/NG parts book shows it as 5500-36 Nev
by nevhunter
Fri Dec 07, 2018 10:10 pm
Forum: Four stroke
Topic: BSA Conrod in a 4G?
Replies: 8
Views: 283

Re: BSA Conrod in a 4G?

repeat deleted by poster Nev
by nevhunter
Fri Dec 07, 2018 10:10 pm
Forum: Four stroke
Topic: BSA Conrod in a 4G?
Replies: 8
Views: 283

Re: BSA Conrod in a 4G?

Unless any alloy rod you fit is fairly new they are a bit of an unknown. Back a while most builders of fast Triumphs twins always used new rods with a rebuild and the Alloy JAP speedway rods only ran one season and hung it on the wall with a hacksaw cut in it. Nev
by nevhunter
Fri Dec 07, 2018 10:06 pm
Forum: Ariel Talk
Topic: rear rack/carrier for rigid frame machines
Replies: 10
Views: 275

Re: rear rack/carrier for rigid frame machines

Pn 5630-40 Rounded corners and similar to many earlier ones in looks. You would have to drill the mudguard to use the centre stays. I wouldn't be too keen on that Nev
by nevhunter
Thu Dec 06, 2018 11:42 pm
Forum: Ariel Talk
Topic: ArielMAroon /Deep Claret
Replies: 7
Views: 248

Re: ArielMAroon /Deep Claret

As said . It's quite likely there are variations (as with Indians for example) Some of the Ariel colours are quite inspired. The Reds (inc maroon) and the greens especially. The wedgewood blue is hard to keep clean as is any light colour. nev

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