Turning For Tessitori

[cg 2005]

Andrew requested a new ignition switch holder for a fork change he is contemplating on BMW F650 GS. I told him I would try to get it together for him. After scaling the drawing, drilling the 8mm and 6mm holes in the drill press and shaping the piece it was time to bore the 30mm ignition cylinder hole. My largest bit is 1" or 25.4mm so after a series of stepped up hole diameters it was time to bore out the last 5mm.

The oddly shaped part required half a day of thinking and beer contemplation to get it set on the face plate.

Here are some shots from Flatistan Fabrication, makers of exemplary F650 farkles:

 

[metalmaster]

looks great, on parts like that I try to put the holes in before shaping the profile.

mike

 

[cg 2005]

looks great, on parts like that I try to put the holes in before shaping the profile.

mike

So do I normally. However, the curves were my biggest concern. So I decided to wait with the 30mm hole until I got the curves to come out. I still need to loop about an 1/8" of each end then it will mate up to the drawing.

 

[nightowl499]

Nice work, im inspired to do something like this on my next project bike

 

[Jeff in Pa]

Any balance/shake problem? Looks like most of the weight is on one side.

 

[cg 2005]

Nothing noticeable, but I was only turning 130 rpm.

 

[Jeff in Pa]

Nothing noticeable, but I was any turning 130 rpm.

That explains it. This is one of those times where you don't worry about correct surface footage.

 

[cg 2005]

Exactly.