The Renaissance Man
__CERTIFIED DIVER__ (Open Water & Open Dumpster)
Staff member
Moderator
Pro Member
Thanks guys.
For the head tube opening, I first put the bike on it's side and laid the tank on the frame in the proper position. Then, I marked the center of the head tube on the tank (top and bottom). After bolting the tank halves back together, I added some 200 mph duct tape to make sure nothing could move and then drilled a 1/4" pilot hole at the marks.
To make the hole saw line up at the correct angle, I mounted the saw on a section of 1/4' rod long enough to pass through both pilot holes thus keeping the saw fixed in position as it cut. I only allowed the saw hole to penetrate about 2/3 of the way through then swapped ends and cut the bottom out completely. By not cutting completely through the top side, the 1/4" hole for centering was still usable for the second cut. Then when I swapped back, the 2/3 cut was sufficient enough to guide the blade on through.
For the head tube opening, I first put the bike on it's side and laid the tank on the frame in the proper position. Then, I marked the center of the head tube on the tank (top and bottom). After bolting the tank halves back together, I added some 200 mph duct tape to make sure nothing could move and then drilled a 1/4" pilot hole at the marks.
To make the hole saw line up at the correct angle, I mounted the saw on a section of 1/4' rod long enough to pass through both pilot holes thus keeping the saw fixed in position as it cut. I only allowed the saw hole to penetrate about 2/3 of the way through then swapped ends and cut the bottom out completely. By not cutting completely through the top side, the 1/4" hole for centering was still usable for the second cut. Then when I swapped back, the 2/3 cut was sufficient enough to guide the blade on through.