![]() This is critical for adding needed strength, as the long rake will put serious stress on the neck tube. They were made from 3/4" pipe so they could be bent to shape.Īfter mocking up the forks, wheels, and frame, and ensuring that all the toleranaces were correct, a strengthening gusset was welded to the neck tube (Fig. We opted for a swept back, simple design on this bike instead of ape hangers. ![]() Risers were welded in place, and then the handlebar was welded on. The forks were installed, and again it was ensured that the frame sat level to the ground. So far, this method worked very well for a small bike. The tabs were then welded in place at the bottom and up the back at the slit for maximum safety. Some material was ground off the inserted portion and the fit was very tight. The axle tabs were then inserted into the forks (Fig. The Axle Tabsįor the axle tabs, a 1.5"x1.5"x.25" piece was welded to a 4"x.75"x.25" piece of flat stock.Ī slit was cut into the back side of the forks (to minimize asthetic damage). A cross support was added near the bottom, high enough to clear the intended tire. The two long tubes were then added to the top portion. Holes were drilled top and bottom at 1/2" size for the frame neck to fork connection. Instead two 3" tubes, boxed by 4"x1.5"x.25" flat stock create the top portion of the forks in Fig. Knowledge is energy, as France Bacon said, furthermore this site will put you in a locate to ask the just your or to talk intelligently about a what a frame is built the how the work that goes into. Without a drill bit large enough, we did not have this luxury. Budget Hacker Bicycle From course it's pretty absorbing to understand how chopper frames are built, additionally inside theory it's pretty light. Ideally, one would cut two pieces of 1.5" flat stock, drill through them and then slide the fork tubes through the holes. To make the forks without a large diameter drill involves a lot of welding. The amount of rake increases the stress on the frame, so reinforce adequately and be cautious. If you make poor welds or don't use gussets, you will have problems with your frame breaking. ![]() Gussets and thick material are your solution, but at some point you'll reach "too long" - you are limited by material and welding ability, not imagination. But the larger the mini bike, and the longer the forks, the farther the front wheel will be from the frame. For a pocket sized chopper, the forks aren't too long. Secondly, the longer you go with the forks, the more the material will flex on bumps. This isn't a major factor on a small bike, but shouldn't be overlooked. How Does Rake Effect Performance?Īs rake increases, several things are effected. 1), we used an extreme front end rake of around 50 degrees. How Much Rake For a Mini Chopper?įor our mini chopper project (Fig. The angle that the front end forks are set at is known as the rake, and is the defining characteristic of a chopper. All Raked Out Mini Chopper Rake and Front End Forks
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