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by chris.shearwood
Sat Sep 14, 2019 1:09 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 4079

Re: 1948 Iron 4G Coil Ignition

BUT how do I check the Distributor Timing, to be sure the spark is at 8mm BTDC ? Can`t you put a couple of centre-punch marks on the end of the front crankshaft, one for TDC and one for fully advanced? This can be done by putting a stick or wire down the plug hole. Remove the rocker box lid to make...
by chris.shearwood
Fri Sep 13, 2019 4:42 pm
Forum: Member's Bikes
Topic: My 4G Restoration Blog
Replies: 123
Views: 14813

Re: My 4G Restoration Blog

So it looks like I have the correct original washers for '39 type girder forks with auxiliary springs but I haven't found any other photos on the internet of bikes with these washers. As expected, these 1/8" washers are also listed in the W/NG Parts Book, but can I find a photo of a W/NG with ...
by chris.shearwood
Tue Sep 10, 2019 5:28 pm
Forum: A Bad thing happened to my Ariel
Topic: "That hasn't happened before . . ."
Replies: 15
Views: 717

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

When I was putting together my Sq4 I discovered that a previous owner had attached the sprocket to the hub with bolts of the wrong thread. I forget if they were metric, UNF, UNC or something else. The threads in the hub were not totally ruined so I installed the correct CEI bolts with Loctite but, b...
by chris.shearwood
Thu Sep 05, 2019 6:49 pm
Forum: Four stroke
Topic: 1955 NH gearbox oil change
Replies: 12
Views: 584

Re: 1955 NH gearbox oil change

How much oil is required? Hello David, Mr.Haycraft says: "All 1952 and later Burman boxes have an oil level plug located also on the kick-starter end casing; to top up the gearbox to the maximum permissible level, it is only necessary to pour in engine oil through the filler-cap orifice until ...
by chris.shearwood
Mon Sep 02, 2019 1:14 pm
Forum: For sale/wanted - Parts
Topic: 4G Grease Dashpot 464261
Replies: 2
Views: 206

Re: 4G Grease Dashpot 464261

Hi Vincent, Here is a photo of the dashpot on my Sq4. Put "dashpot" in the search box at the top of this page for more info.
Regards, Chris
by chris.shearwood
Sat Aug 31, 2019 1:08 am
Forum: Four stroke
Topic: Square Four
Replies: 4
Views: 295

Re: Square Four

Why don't you join the club and then volunteer to set up an on-line form for joining?
by chris.shearwood
Mon Aug 19, 2019 1:01 pm
Forum: Four stroke
Topic: Burman gearbox cover
Replies: 9
Views: 577

Re: Burman gearbox cover

Nick,
I'm glad you succeeded but your mention of the outer plate popping off makes me wonder if you had all these parts nicely greased before installing them.
Regards, Chris
by chris.shearwood
Sat Aug 17, 2019 12:06 pm
Forum: Four stroke
Topic: Burman gearbox cover
Replies: 9
Views: 577

Re: Burman gearbox cover

I've used the string method successfully a few times. I don't remember any need for a rubber band, just a string turned a few times around something convenient above and towards the rear (of the bike), then looped down over the gear change mechanism and then back up and towards the front and tied ar...
by chris.shearwood
Fri Aug 16, 2019 6:09 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 4079

Re: 1948 Iron 4G Coil Ignition

This diagram from Bacon's book might help you.
by chris.shearwood
Sun Aug 11, 2019 12:30 pm
Forum: Four stroke
Topic: Single Cylinder Ignition Timing
Replies: 9
Views: 1110

Re: Single Cylinder Ignition Timing

Simon, I think you've done a very good job detailing all the steps of the timing process. The only thing I would add is that there should be some provision made so that your bamboo stick doesn't disappear down the plug hole if the motor is turned too far. Don't ask how I discovered this to be a good...

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