The first side of the frame tack-welded and ready to start finish welding. The rear suspension units will be supported from the 1" square section tubes.

This wooden frame mock-up shows the approximate positions of cross members that join the two sides of the frame together. The detail at the rearmost point of the frame does not actually represent how this will be built in steel and is simply to provide enough stiffness for checking the seating position, etc.

This is the lower half of the frame jig, shown with one side of a wooden mock-up frame, for illustration and clarity. The jig works as a sandwich, with a lower plate (shown) on which various adjustable location blocks and stops (also shown) are mounted. With the frame members in place the upper plate is fitted and tightened to grip the frame tube in position. Both the the upper and lower plates have hole bored through them at points where frame tubes intersect. Tack welds can be made through these holes, before removing the frame tubes from the jig for final welding.

The frame has been modified to wrap over the engine rather than to either side, which was impractical, as the kickstart would be obstructed and the width between the rider's legs would be too great. The suspension units have also been adjusted to avoid or reduce any decreasing-rate geometry.