Hi Dan
Like John said there is quite a few differences with the 2012 Tiger1
After lowering my rear deck supports,I kept my 2 parts of the Deck fixed together
so it all lifts off in one go.
The measurement of 16.5mm you mentioned is just over 5/8.
Your Sprocket looks about right in your photo.
The shaft on the 2012 Tiger1 is drilled and tapped,so I just adapted the screw to
look like a cone bolt,it is just pinched up and a bit of"Marmite"on the threads as
a mild retainer
My Lift is a "Clarkes Strong Arm",When Launch day comes,I will turn it round towards
my patio doors and drive off down the slip way,sorry I mean ramps
Cheers
Phil