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...

This diagram from Bacon's book might help you.

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...

paul.wirdnam wrote:..but the problem is that many other people seem to have gone off SQ4s......they must be out of fashion.

I've heard they overheat on the rear cylinders too.

Mick D wrote:I'm assuming your impact driver ratings are in pounds force inches,

I think Johnny is talking about impact wrenches not impact drivers. I bought a cheap one recently that is rated at 350 ftlbs not inlbs.

As for torque figures and because I have a good range of torque wrenches I have torqued the gearbox sprocket to 60 LBFT and will torque the shock absorber and clutch centre to 50 LBFT Both of those torque values seem low to me. I have never used a torque wrench to put on those nuts but have just ti...

Richard,
Great story. Thanks for sharing. Made me chuckle!

Gui.dorey wrote:Now, I'll have to tackle the oil leaks which still are way too much, especially from the drive side.

What is the oil level in your primary case?

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.