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by brenton.roy
Sun Sep 15, 2019 10:56 pm
Forum: A Bad thing happened to my Ariel
Topic: Piston problems Model C
Replies: 4
Views: 123

Re: Piston problems Model C

The pitting on the crown suggests it was burning really hot. Lean?
It's not easy to jet the mains as we tend not to ride at big throttle openings.
by brenton.roy
Sun Sep 15, 2019 10:48 pm
Forum: Ariel Talk
Topic: Jaap Fijma racing headquarters in the 30's
Replies: 7
Views: 164

Re: Jaap Fijma racing headquarters in the 30's

Nice photo Vincent. 4 blokes in full leathers. One of the bikes is registered? and seems to have a smaller, wider rear wheel. The bike to the left of photo with two mechanics maybe the same rear wheel. Larger capacity? That bike and the one to far left have different tank paintwork to the LG in fore...
by brenton.roy
Thu Sep 12, 2019 10:58 am
Forum: Main Chat Forum
Topic: Really Jim..
Replies: 9
Views: 439

Re: Really Jim..

I've led a sheltered life..
How does that work Eero? Is it like a tupperware bowl? Or is the bottom cut out, like a funnel?
by brenton.roy
Wed Sep 11, 2019 11:27 am
Forum: Main Chat Forum
Topic: Really Jim..
Replies: 9
Views: 439

Really Jim..

What was he thinking...
by brenton.roy
Sun Sep 08, 2019 10:59 am
Forum: Ariel Talk
Topic: Magdyno conversion......
Replies: 7
Views: 676

Re: Magdyno conversion......

Looks a bit like a grenade :) Maybe a WD part?
by brenton.roy
Sun Sep 08, 2019 10:51 am
Forum: A Bad thing happened to my Ariel
Topic: "That hasn't happened before . . ."
Replies: 19
Views: 1285

Re: "That hasn't happened before . . ."

Is the chain stretched or the sprocket a little out of round?
by brenton.roy
Sun Sep 01, 2019 12:29 am
Forum: Four stroke
Topic: New VB piston
Replies: 17
Views: 774

Re: New VB piston

They do make them here in Adelaide https://www.norndaautomotive.com.au/jp-pistons.html I think Ariel and BSA.
by brenton.roy
Sun Sep 01, 2019 12:25 am
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5120

Re: 1948 Iron 4G Coil Ignition

I do not see how the original magneto capacitor could be in the circuit. Good point. I don't quite understand whether the magneto is providing an initial spark which is amplified via the CDI or whether the magneto is disconnected completely and is just a housing for the CDI? My apologies for steeri...
by brenton.roy
Fri Aug 30, 2019 2:15 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5120

Re: 1948 Iron 4G Coil Ignition

Hi Chris, it depends on how you set the timing. The 'points plate' moves relative to the distributor cap, so you want the copper end piece or the rotor to line up with the post for number one, across the full range of advance and retard. I.e if you set the timing at mid advance, the centre of the ro...
by brenton.roy
Tue Aug 27, 2019 1:28 pm
Forum: Main Chat Forum
Topic: Ariel twin
Replies: 69
Views: 4875

Re: Ariel twin

Skull and cross pistons :)
Looks tidy.

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