DIY Vespa Frame Jig

[potatopl]

My mate welded it up. A quick test on bend cutdown XL2 frame came positive. Straightening in left-right and front-rear directions work. Unfortunately, we couldn't repair the "twist" in the fork axis.

[ttscshaggy]

You'd need a known straight frame to work out fork tube.

Also adjustable for different wheelbases

[potatopl]

That will be the next step shaggy. It's still a prototype, we just wanted to check if the frame is fixed stable and we can move the frame front with a bar.

Will take measurements from straight PX/PK/V50 frames (distance between seat end and fork tube) to determine the fork angle.

The "axis" straightness can be checked with a rod going through the middle of a seat area and pointing into the fork tube (as seen in the pics.

The jig is adjustable, the middle frame support is sliding inside the frame so the bottom support point can be changed. The other support point is fixed - goest through the engine bolt holes.