Thanks Chris have you had or anyone else had dealings with brightspark, ,I'm looking to get my mag reconed any recommendations would be greatly appreciated I had a magneto for my BSA Sloper done by Brightspark. It didn’t require much - a good clean and replacing the original condenser with one of t...

Thanks for the links to the articles on reading spark plugs. Very interesting.
After reading them and examining my plugs again, I would say the mixture ist too rich and the timing could be more advanced.
Some more testing required…
Cheers

simon.holyfield wrote:I'd check the ignition settings. I use B6HS and they are much darker than that.

Also leaning that way. I have no washers under the float, so can't go any richer there.

Just to be sure with the ignition timing - Does it seem to be retarded by looking at my plugs?

Hello chaps, After the first 200 miles this is what my plugs look like. I’m holding 1 and 2 in my hand, 3 and 4 look similar. The plugs are NGK B6HS. It looks too lean to me, but what’s your opinion? Since the jets are fixed, could it be that the ignition is too retarded? Or the plugs too hot? If th...

Hello Everyone, I installed a Thorspark Ignition on my Sq 4 and was very happy with it. Easy starting, ran great. A few days ago the engine just died while in top gear, all lights out, all electrics dead. Fortunately I was just about to turn into the street where I live so I didn’t have to push her ...

Hello Gui, thats a very nice Mk1. Congratulations. When I looked at the photos of your outing, it seems that the 2 front mudguard stays are too long compared with the red Mk1. Too long stays result in an uptilting mudguard. There are 2 different lenghs, the one for the valanced guard and the other ...

If there's still any lack of higher speed smoothness or power it might be worth making sure the fuel can get through properly - they tend to like a full tank - and the breather must work of course. I guess you'll have checked engine mountings are tight too? Eggs, grandmothers etc. That’s all sorted...

Vincent, that looks like the clamp for the exhaust header that holds it to a lug on the frame. There should be two - left and right and they are on the bottom frame tubes towards the front. The two bolts look like the ones for the rear mudguard. The one for the left side is where the rear stand spri...

Finally finished after 2 1/2 years rebuilding her from a basket case.

Bob and Simes, Thanks. That sounds about right. I used an 8mm pipe to fit inside the banjo bolt inside the timing case when I did the mod to get the breather opening towards the area of the cam sprocket. 8mm is about 0.32” which matches the pipe bob measured. So I should get a banjo union for a 1/4”...