SOHC.co.uk Forums > CB350/400
Fork Seals
Oddjob:
Rear axle nut? You mean front axle nut if it’s a fork seal. If it’s the 2 nuts holding the axle holder then there is an allen bolt hiding at the bottom of the fork slider under the axle clamp. There is a copper washer on the allen bolt which is meant to seal against oil loss. Either the bolt is loose or the washer isn’t crushed enough or it’s just missing.
Been a while since I worked on a 400 but aren’t the indicators on a small frame where the headlight mounts? Maybe the frame is bent or positioned wrong.
Otis:
Sorry, it was not clear, I mean't the rear nut of the front axle holder.
I have just checked all four nuts and torqued them to 25Nm and got nearly a quarter turn on each one.
Oddjob:
The nuts are only there to hold the axle clamp Otis. It’s the allen bolt underneath that is leaking any oil you can see, you need to fix that.
Otis:
--- Quote from: Oddjob on August 30, 2026, 11:55:37 AM ---The nuts are only there to hold the axle clamp Otis. It’s the allen bolt underneath that is leaking any oil you can see, you need to fix that.
--- End quote ---
Thank you for that, I will attend to it straight away.
Incidentally, here is a picture of the positioning of my front reflectors of which the left one catches the tank.
Orcade-Ian:
Hi Graham,
Sitting on the bike with the front wheel dead ahead, does the headlamp seem to be pointing slightly to one side? Peer over the top to see relative to the front guard. The reflectors are threaded into the top shrouds, so that point is fixed however, the shrouds themselves can rotate slightly, causing your problem. Hence asking about the position of the headlamp. You can gently push on one side of the headlamp to make each gap equal.
Ian
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