Topics

Spent the winter restoring a 1977 RD400E.
Still some carb work to do, but otherwise ready to roll.
Brings back sweet memories from my late teens when I bought my first new bike, a 1977 RD400D.
Hemi

I'm looking for assistance with a disturbing clunk at the top of fork travel in my 1977 RD400E, even when going over small bumps at low speed.
The clunk is disturbing to the point of not wanting to ride the bike.
I've been refurbishing the bike, tip to tail, over the winter, added Vape ignition, many parts, paint, top end.
New fork tubes, have now added progressive springs, tried different weights and levels of fork oil.
The clunk is at the top end of travel when forks extended after a bump in the road, nasty clunk felt through the bars.
The steering head seems fine, new bearing, adjusted to specs.
I've owned 20 bikes over the decades, including an RD400 back in the day, and have never experienced anything like this.
Any and all thoughts would be much appreciated.
I'm stumped, as is John at Economy Cycle......
Hemi