Originally Posted by
PhilFo
One does not have to machine the bolt, per-se, you only need to stick the bolt into a drill then file off about 15mm of thread towards the head of the bolt. You just need to carry a wrench to loosen/tighten the bolt when you want to fold it up.
Thanks, PhilFo. I've ordered the original key from eBay, but may mess with the bolt that's in the bike now and see if I can get it to work as an experiment...just need to find a drill that will accommodate the head of the bolt.
Another question: is there an easy way to determine how old the Twenty is?