Old School Chopper Frame Fabrication - Knucklebuster

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Figure 12 While the notcher is set up I'll usually make two more identical pieces of tubing to be used later as temporary spacers between the wishbones and even later on between the bottom rails. Now we’ll finish up the wishbone tubes and get them ready to be welded to the backbone. This isn’t a complicated step but it has been hard for me to describe verbally so in an attempt to clarify the process we made a small layout board from plywood.
Figure Error! Bookmark not defined. Initially the wishbone tubes were rough cut a little longer than needed and bent 26 degrees in towards the top tube. The layout above shows how the pieces look now in relation to the centerline of the frame and lines demarking the 8-3/8” inside frame width. What we want to do now is to chop off the excess material at the end of the tubes where they will be welded to the backbone and bring the pieces inward until they are at the proper spacing. Figure 14 show the left hand tube moved in towards the centerline of the frame so its inner edge is 4-3/16” off center (8-3/8” divided in half).
Page 1 and 2: Old School Chopper Frame Fabricatio
Page 3 and 4: 1. Steering head. Also called the s
Page 5 and 6: Figure Error! Bookmark not defined.
Page 11: Figure 11 This cross member sets th
Page 15 and 16: Figure 15 Figure 15 shows the end r
Page 17 and 18: Figure 17 There is a corresponding
Page 19 and 20: Figure 19 I call this area of the f
Page 21 and 22: Figure 23 The slope angle of the 'r
Page 23 and 24: In Figure 3 we can see the two tube
Page 25 and 26: Figure 1 shows the basic components
Page 27 and 28: an eighth of an inch clearance betw
Page 29 and 30: Figure 6 In Figure 6 we've deepened
Page 31 and 32: Figure 2 if you look closely you ca
Page 33 and 34: angle finder. It explains is easy t
Page 35 and 36: Figure 6 In this shot I've propped-
Page 37 and 38: In case you're interested I messed
Page 39 and 40: Figure 3 Figure 3 depicts a plate t
Page 41 and 42: Figure 7 Figure 7 is another 'boxed
Page 43 and 44: Regardless of the style or type of
Page 45 and 46: Figure 13 At this point all you nee
Page 47 and 48: Figure 1 You'll no doubt realize th
Page 49 and 50: Figure 4 Actually the plate will be
Page 51 and 52: If you're building a frame without
Page 53 and 54: Figure 5 Now that the plates are in
Page 55 and 56: Figure 2 Clean the notch up slightl
Page 57 and 58: Figure 5 The frame in Figure 5 is o
Page 59 and 60: Figure 7 The tube in Figure 7 above
Page 62 and 63:
We'll now begin doing the detail wo
Page 64 and 65:
The charge has been removed from th
Page 66 and 67:
Some people have reported problems
Page 68 and 69:
Steering Necks For some unexplained
Page 70:
Figure Error! Bookmark not defined.
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Old School Chopper Frame Fabrication - Knucklebuster

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