1. Great Oil Filler Cap!
The cap I received was the first generation Driven oil filler cap--with a 17mm bolt head vs the Allen socket as pictured. I was actually looking for the first generation type, so that worked out for me quite well. I have both types of the Driven cap (two motorcycles), and like each type. Both look great and function as they should, and are easy on and easy off. The large socket (1st gen) and large Allen wrench size (2nd gen) was a good idea--I had an aftermarket oil cap that had a small 4mm Allen head that stripped. Other designs on the market require a special tool or Channel Locks and a rag to protect the cap's finish. Whichever Driven cap you get--it will be the last oil cap your bike will ever need.