I received a couple different oil filler plugs (or caps, if you'd like), so I thought I'd compare them.
The stock Triumph oil filler plug:
Stock Triumph oil filler plug for the Bonneville T100. Bonnie Café.
The first contender, the LC Fabrications oil cap:
LC Fabrications oil cap for the Triumph Bonneville T100 motorcycle. Bonnie Café.
LC Fabrications oil cap for the Triumph Bonneville T100 motorcycle. Bonnie Café.
And the second, the Joker Machine oil filler plug:
Joker Machine oil filler plug for the Triumph Bonneville T100 motorcycle. Bonnie Café.
Joker Machine oil filler plug for the Triumph Bonneville T100 motorcycle. Bonnie Café.
Both are aluminum, very well machined and come with O-ring. Let's compare both in place against the stock oil cap:
Stock Triumph oil filler plug for the Bonneville T100. Bonnie Café.
LC Fabrications oil cap for the Triumph Bonneville T100 motorcycle. Bonnie Café.
Joker Machine oil filler plug for the Triumph Bonneville T100 motorcycle. Bonnie Café.
Both the LC Farbrications and Joker Machine are big improvements over the stock Triumph cap, aesthetically and functionally. Removing them, the stock cap requires a quarter, the LC Fab a 19mm wrench, and the Joker Machine a hand. For me, this is a big plus for the Joker Machine plug. Aesthetically, the LC Fab is cool with the finned design but overall, I prefer the Joker Machine with its holes and lower profile. Holes vs fins, it's all subjective.
I'm sticking with the Joker Machine. I'll be changing the oil every 3000 miles, so being able to remove it by hand will make the process a little bit easier.
Tools Required: Large diameter coin 19mm wrench or crescent Hand
Company URL: LC Fabrications Joker Machine
Price: $40 - LC Fabrications Modern Triumph Oil Cap Black $40 - Joker Machine Triumph Oil Filler Plug Clear
Update, 2015.05.03: In the comments, Joey commented on the Joker Machine plug not being a perfect fit. I went back and took a closer look and sure enough, he's spot on. You can see in the following photo that the diameter is 1-2mm too small.
Joker Machine oil filler plug on the Triumph Bonneville T100 motorcycle. Not a perfect fit. Bonnie Café.