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by john.whiting
Mon Sep 02, 2019 6:29 am
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 67
Views: 5626

Re: 1948 Iron 4G Coil Ignition

What I can see in the pic of the points is a stock standard cam and points ,just like I would see if I took the cap off the dizzy in my forklift..........make and break...intermittant earthing of the coil primary as the points make (close).....this is how coil ignition s have worked ever since Charl...
by john.whiting
Sun Sep 01, 2019 8:40 am
Forum: Four stroke
Topic: New VB piston
Replies: 17
Views: 895

Re: New VB piston

I thought i recognized your busted piston......its a Burma Dodge piston.(236 c /i )....side panels are very typical.....Is your pin dia 55/64",(slightly larger than the original Ariel,and easily reamed from the bush.)
by john.whiting
Sat Aug 31, 2019 11:19 pm
Forum: Main Chat Forum
Topic: '51 SQ4 - Reproduction Fuel Tank
Replies: 4
Views: 441

Re: '51 SQ4 - Reproduction Fuel Tank

I see you re in USA so sending it back isnt an option......I have a 51 S4 tank on my 50 VG,and its very large compared to the proper panel tank........have to be careful of bar position or the levers will collide with the tank.....
by john.whiting
Sat Aug 31, 2019 3:44 am
Forum: Four stroke
Topic: sq4 camshaft removal
Replies: 3
Views: 363

Re: sq4 camshaft removal

If you use chain tension ,you will bend a shaft..........Get a proper chain holding tool,and use it on the camshaft sprocket......it is also safe to use an impact gun,used sensibly.
by john.whiting
Fri Aug 30, 2019 10:24 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 67
Views: 5626

Re: 1948 Iron 4G Coil Ignition

I do not see how the original magneto capacitor could be in the circuit..........the end of the mag armature now has a (breaker) cam mounted on it ,with a big cross point screw stuck in the guts.......might even be a self tapper ,and a dab of epoxy.The cam is not part of any circuit,and in any case ...
by john.whiting
Fri Aug 30, 2019 7:47 am
Forum: Four stroke
Topic: top end bushes
Replies: 3
Views: 420

Re: top end bushes

A bit of heat ?
by john.whiting
Fri Aug 30, 2019 7:46 am
Forum: Four stroke
Topic: New VB piston
Replies: 17
Views: 895

Re: New VB piston

A lot of modern bikes ,all there is of the piston is rings ,and a pin jammed up underneath.........just like yours if all the skirt was taken off.I dont know how they work...but they do.Looking at the deckheight ,a car piston would probably be found to fit.
by john.whiting
Wed Aug 28, 2019 11:58 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 67
Views: 5626

Re: 1948 Iron 4G Coil Ignition

I dont see how the original maggie cap could still be in the circuit......in a car points system,the only live part (points open) is the wiring contact in the housing,arm lead ,and the point arm .......which is insulated from all the rest of the setup.A normal external cap is hooked up to the insula...
by john.whiting
Wed Aug 28, 2019 5:51 am
Forum: Main Chat Forum
Topic: continental petrol tank identification
Replies: 7
Views: 542

Re: continental petrol tank identification

Pressed tube spine frame moped of some breed.
by john.whiting
Wed Aug 28, 2019 5:48 am
Forum: Four stroke
Topic: Big End
Replies: 7
Views: 565

Re: Big End

Ive found that just replacing the rollers with new standard rollers will make a big improvement in most engines where the pin surface hasnt failed..........the main cause of big end wear is dirt in the oil,and if the bike has no aircleaner ,then new rollers may be a cure........oversize rollers aren...

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