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by john.whiting
Thu Jun 13, 2019 5:43 am
Forum: Four stroke
Topic: VB Exhaust valve guide play
Replies: 13
Views: 692

Re: VB Exhaust valve guide play

It actually makes more sense to cut away the box enclosure ,and run the valves in the open,with no more than a bit of bent tin to keep out the desert sand as in the WD16H....or does it?......The Norton was a 1937 design frozen by the need for conformity in the army motorcycle.The Big 4 had the next ...
by john.whiting
Sun Jun 09, 2019 5:33 am
Forum: Four stroke
Topic: So it begins
Replies: 56
Views: 2220

Re: So it begins

Its often a tricky decision between fitting a liner and maybe taking the case too thin,and using an oversize OD,which has no effect on the case...............however as Nev mentions,babbiting a bronze bushing is childs play,and this is the way I would go.The reason I suggest bronze is twofold..........
by john.whiting
Sat Jun 08, 2019 1:55 am
Forum: Four stroke
Topic: So it begins
Replies: 56
Views: 2220

Re: So it begins

Simply rebore the bearing bore a bit oversize ,and make a bushing to suit....even if damage is severe ,a bronze sleeve will cure it............note I use bronze as it has a similar expansion rate to ally,and is more likely to stay put.......if these guys can line bore ,then reboring the case is no p...
by john.whiting
Sat Jun 08, 2019 1:43 am
Forum: Main Chat Forum
Topic: why Li-ion batteries are no good for motorcycles
Replies: 11
Views: 708

Re: why Li-ion batteries are no good for motorcycles

Despite all the foregoing,these batteries are quite useful on a bike for a total loss system,as was traditional in this country many years ago..........low draw LED lights have made total loss a quite attractive proposition ,and saves the often considerable expense of restoring trashed generators on...
by john.whiting
Fri Jun 07, 2019 1:49 am
Forum: Four stroke
Topic: Aftermarket alloy singles barrel and piston.
Replies: 14
Views: 632

Re: Aftermarket alloy singles barrel and piston.

Its common to use waisted studs in alloy heads to allow for differential expansion......straight studs often break in the threads,or just tear out of the alloy.
by john.whiting
Thu Jun 06, 2019 1:29 pm
Forum: Main Chat Forum
Topic: Man and sloper come a cropper.
Replies: 14
Views: 869

Re: Man and sloper come a cropper.

Any crash when you re 68 is a nasty one.
by john.whiting
Thu Jun 06, 2019 9:38 am
Forum: Four stroke
Topic: Engine revs rising when air lever opened
Replies: 23
Views: 1547

Re: Engine revs rising when air lever opened

if the head to barrel gasketless joint is leaking,it will spit out particles of hot oil,and generally make itself known on your trousers........I suggest first a smear of blue or red silastic.....expensive ,but definitely stronger than hardware $4 a tube stuff......i used to have a lot of trouble lo...
by john.whiting
Wed Jun 05, 2019 7:24 am
Forum: Four stroke
Topic: Shock absorber knocking
Replies: 56
Views: 1775

Re: Shock absorber knocking

i think the bike needs a good run ,not continuous fiddling.......the exhaust and muffler will get a lot of liquid oil in them,and soon as they get hot,you will have bulk smoke ,no matter how little oil the motor is passing..............I had a V8 Dodge truck engine with one missing oil ring,and the ...
by john.whiting
Tue Jun 04, 2019 9:45 am
Forum: Ariel Talk
Topic: MK1 - After rebuild, oil pools in dished piston tops
Replies: 3
Views: 184

Re: MK1 - After rebuild, oil pools in dished piston tops

Quite normal without valve stem seals......with flat or lumpy pistons,the oil will run back into the sump past the ring gaps...(slowly).....my Norton Atlas had yellow streams running down each exhaust valve and pooling in the closed valve when parked .....It helps a lot if the motor,and oil are very...
by john.whiting
Sat Jun 01, 2019 7:37 am
Forum: Main Chat Forum
Topic: Returned from Australia
Replies: 35
Views: 1004

Re: Returned from Australia

My favorite for the week is the crowd on Everest.......now form an orderly queue, dont jostle,just be patient and youll all get up to the summit today........I cant really see Hillary and Tensing battling up to the summit after that.

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