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by john.whiting
Mon Feb 18, 2019 3:44 am
Forum: Four stroke
Topic: Plunger suspension ride height adjustment
Replies: 26
Views: 340

Re: Plunger suspension ride height adjustment

Winding springs isnt all that difficult................a crowd named Chessel Springs used to roll up railway springs on an old lathe by hand ,after hand forging the feathered ends.........nothing exotic,just a large torch heating the rod orange as it went onto a mandrel in the lathe....The end of th...
by john.whiting
Mon Feb 18, 2019 3:33 am
Forum: Main Chat Forum
Topic: A chat today was amusing
Replies: 16
Views: 315

Re: A chat today was amusing

None of it worries me.........Ive already junked many tons of stuff I was interested in,and many more to go............at least with old bikes ,there is a market ,but for a lot of things people collect ,everything will go for scrap.........what I notice is cashed up middle age men are prepared to pa...
by john.whiting
Sun Feb 17, 2019 12:24 pm
Forum: Four stroke
Topic: Plunger suspension ride height adjustment
Replies: 26
Views: 340

Re: Plunger suspension ride height adjustment

On the subject of springs ,to increase the rate,you need to use thicker wire.The alternative sometimes resorted to is to use less coils ,wider spaced,which ,in fact,causes a increase in the windup of the spring wire..........It may also overstress the wire and cause breakage.......You may not realiz...
by john.whiting
Sun Feb 17, 2019 12:15 pm
Forum: Four stroke
Topic: Plunger suspension ride height adjustment
Replies: 26
Views: 340

Re: Plunger suspension ride height adjustment

You obviously need to get some stiffer springs made........however packing the existing springs is a satisfactory solution,and will also provide a travel stop that should stop the tire fouling the guard.
by john.whiting
Sun Feb 17, 2019 7:04 am
Forum: Four stroke
Topic: Plunger suspension ride height adjustment
Replies: 26
Views: 340

Re: Plunger suspension ride height adjustment

Its termed "taken a set",in other words the spring has settled ..........temper is unaffected ,and if you can find someone to do it ,the spring can be annealed ,extended and rehardened and tempered........I had a friend worked for Thomas Marsh Springs,and he could just toss a spring onto t...
by john.whiting
Fri Feb 15, 2019 3:56 am
Forum: Ariel Talk
Topic: Quick Mag Question:
Replies: 8
Views: 280

Re: Quick Mag Question:

That is correct ....with the pickup behind ,water spray from the back tire gets into the mag,which doesnt happen with the pickup tucked in behind the cylinder.Condensation on the surface is quickly dried away by the heat ,too.
by john.whiting
Tue Feb 12, 2019 9:40 am
Forum: Main Chat Forum
Topic: Selector forks
Replies: 3
Views: 113

Re: Selector forks

The boxes have design similarities,but as far as I know the Leader box was specially designed for the application,and only bearing sizes carried over......The GB box has its origins with the AJS 7R,and the box was designed by Peter Williams and Ike Hatch of AMC,as an equivalent to the Norton box.
by john.whiting
Tue Feb 12, 2019 4:59 am
Forum: Main Chat Forum
Topic: Selector forks
Replies: 3
Views: 113

Re: Selector forks

Leader or Arrow forks are constructed like that.
by john.whiting
Mon Feb 11, 2019 6:13 am
Forum: For sale/wanted - Bikes
Topic: Square four up for auction
Replies: 7
Views: 290

Re: Square four up for auction

Looks like 18" rims too...Borrani?..........A65 brake has got to be a useful improvement.
by john.whiting
Thu Feb 07, 2019 8:26 am
Forum: Ariel Talk
Topic: Swinging Arm Powder Coating
Replies: 5
Views: 198

Re: Swinging Arm Powder Coating

Only supposition,but rubber has a lot of oil in it,and its likely that some at least will vaporize under heating.......In fact ,with very old tires,as on a tractor parked in the sun all the time,the tire rubber goes black and hard and cracks because the oil has evaporated..................there is a...

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