I don't know if this is interesting to you all, but I am in the process of making some changes to this bike to work better as an around town/picnic bike with my kids. So it won't be an original period correct type of piece which may immediately oust me from good standing with the RetroBike overlords, but I am trying to capture the spirit of the original bike as much as possible!
Can share my progress but thought you may appreciate hearing about the stem first! My goals:
• Maintain color matched fork & stem (feels so unique to this bike and Kona!)
• Reduce reach of stem for more upright riding position
• Avoid resorting to a different stem and having to use a 22mm quill + shim
• Expand the amount of wide bar options by having a 31.8mm bar
I decided to shorten the original Kona Velocity stem and bronze braze a Paragon Machine Works 31.8 clamp. Repainted to match (thanks to
@RadNomad for the paint codes in his thread) with Mitsubishi Yellowish Brown C05, and had Gil supply some decals (sized down for the shorter stem). Pleased with the result. Decided to leave Paragon Machine Works faceplate raw silver since there will be lots of silver accents on the bike.
Measured the cut off point to result in a 90mm length stem.
I mad the first cut close to the stem clamp, and then I clamped a tubing block on the end to score where I wanted the final cut. I needed to slowly work around cutting it from all sides to end up with a square end to the tube so it would mate well with the stem backing plate.
I devised this very scrappy setup to get the clamp fit up with flux to the stem. I needed a window for access with the torch to head up the backing plate from the frontside to mitigate roasting the extension tube!
After brazing, have not soaked off the flux yet.
Test fit on the bike with a bit of filing and clean up.
The finished stem with velocity decals and paint!