Well look at that, almost looks like a clean break. That's scary

In the case with Ian's B310, it was a shoddy job done on the fly wheel bolts. Someone and it wasnt me, put non high tensile where high tensile bolts should have gone, plus they had welded the bolts together.

I'd say rapid heating and cooling, particularly on a lightened flywheel. They tend to shatter - just too much mechanical stress on them. Like doing a 10min burnout continually slipping the clutch on and off....(I saw a VL Turbo spit a flywheel doing exactly that a few years ago) - Funny yet potentially deadly.

Quote:

usually machining too much material from a cast iron flywheel.

makes me want an additional shield on mine...

those ones are much thinner than our A series flywheels.

what causes them to break? Under or over torquing?

Quote:And we wouldn't want that, would we. LOL

Global........ Thats an understatement. Will be good to finally meet you next year.

That 310 is a great example of the global economy in action.

It was sent from Japan to New Zealand and after being enjoyed by a few owners was offered for sale by a German studying law in New Zealand.

A New Zealander living in the US used Paypal to buy it off a website while on a family vaction in Canada.

His brother who is currently in Australia will be picking it up in a couple of weeks.

And it is being stored/repaired by a bloke neither have met. Heck I'm starting to sound like Dodgeman!

Thats nasty!