Old Chopper Tripple Clamp

Solution treatment

delighted to find how acurately i could controll the furnace +- 1degC
But have just found out that the domestic oven in my workshop can atain the frankly ridiculous temperature of 330c!! so i may have undone solution treament, whilst trying to stabilize at 250c

test wax rim

Heres the first atempt at the plaster former didnt work perfectly, but have now learnt how to doit, but it was good enough to take a section of wax off and try forming the inside rim with the scraper, worked perfectly.

rim or conventional disc

This is nearly as big as a rim disc and has the big advantage of being an off the shelf item, and made from a approprate material.

Wheel Base

showing the potential for a very short wheel base 49" in the photo, with a 6" SA strech would still only be 55" about the same as a motogp bike

Rotary sledge

Here ive made up a kit of parts for the rotary sledge


Here it is assembeled important to get it running true, firstly with shims under the brackets and then with a littl preload on the skate wheel, otherwise id end up with a uneven pattern followed by a wonkey wheel-and we dont want that.
Ive also taken a plaster cast of the rim section as it makes it easier to messure.

Rim Profile

Here is the 14" piaggio rim, thisis what i need to acuratly reproduce, the most critical mesurment being the diameter of the 2 flats between the rim walls, to big and the tire wont fit to small and the tire won't center