Old School Chopper Frame Fabrication - Knucklebuster

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Getting back on track again and working on a frame you have complete control over, once you've cut in the notches in the rear tube ends you'll have to fit and fine-tune the axle plate fit until they're as perfect as you can possibly get them. Figure 4 In Figure 4 we've tacked the plates into position and we'll show how to make some nice 'end-pieces' that dress-up the transition from the tubes to the plates themselves in another article. Once you're satisfied with the fit of the plates it's time to mount a 'dummy' wheel on an axle and check for final alignment before doing the final plate welding. If you want perfection you can mount a dial-indicator on the frame rail and measure the run-out on the wheel. The easiest way of visually checking to see that everything is properly installed is to mount the wheel and pick the frame up by the front end and 'drive' it down the driveway like you were pushing a wheelbarrow. If you can see any wheel wobble whatsoever you have to break the tacks and try to re-align the plates. When you've done everything that you can possibly do to get the rear end aligned you should have a frame that resembles that shown in Figure 5 below.
Figure 5 Now that the plates are installed we can do the first 75% mockup of the frame and see for the first time the real shape of what we've spent all this time creating which is shown in Figure 6 below. Figure 6 In this picture we've mounted a 150 rear tire and blocked the frame up to ride height. As you can see even with the radical chopper profile of the stretched straight backbone line this is very low frame. The steering neck will be just slightly higher than our work bench when it's finished. So far we've only spent $490.00 on this project which includes the wheels and tires so we're well under budget. The next step is to install the steering neck itself. Part 11
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 and 12: 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: If you're building a frame without
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.

Old School Chopper Frame Fabrication - Knucklebuster

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