I have a Thorspark ignition kit. Anybody using one on a Square Four? If so what is the best way to check the timing with a strobe light? What does one use to put some marks and check? I was thinking of using the front crankshaft, by unscrewing the inspection cap and putting some marks on the nut. H...

£200 is a mere drop in the bucket of expenses needed to put a Sq4 together. I think the peace of mind from improved oiling is worth it.

Hi Cam, I agree with John - I too think you should get on that bike and ride it. You mentioned using 40 weight oil - why not 50? Did you use running-in oil to seat the rings? My Sq4 could emit clouds of smoke right after its refurbishment but after a few hundred miles there was no trace of smoke. Re...

I think it has to do a bit with the mindset of Australians. That is the only country where I was strip searched before being allowed in and I've been to many countries!

I don't trust the sidestands on any of my Ariels. The rear stands are almost always the ones I use.

You have cleaned the shaft and interior of the sprocket with acetone or similar to remove all traces of oil?

Hi Chris,
According to Roy Bacon's book, 1948 was the year all Ariels went chronometric. My 46 Sq4 has a PA.
Regards, Chris

Welcome to the Forum! I think the best reference book for Ariel (and other makes) repair and maintenance is Nicholson's Modern Motorcycle Mechanics.
http://www.britcycle.com/Products/moder ... hanics.htm

Gui.dorey wrote: do another attempt, she fires briefly and goes out.

Hello Gui,
Your bike looks good - don't get discouraged, it is going to start eventually. You don't have your timing set 180° out do you?
Regards, Chris

Jim,
This is a photo of the oiler from my Sq4. I think yours should be similar. I agree that blocking off the hole and using a modern chain lube product is a good idea.