SOHC.co.uk Forums > CB350/400

Head Bearings

<< < (2/2)

waffey:
Done mine this week with a kit supplied from DS. Thick washer on the bottom of the yoke. I had plenty of threads left for top nut...%u2026...for what is worth!

Seeing the comment below, I did the same, I removed the ridges from the adjuster nut. Sorry, should of said before.

Erny:

--- Quote from: AndyD on April 01, 2020, 07:34:19 AM ---Just about winning a battle to get head bearings fitted on the 400 and am a bit baffled that it is so awkward.
Went for the All Balls kit which seems to be the most common offering and I have read lots of threads about problems of reduced thread for adjuster nut so tried to proceed as carefully as possible.
Spent ages again Googling on this before starting but there seems to be no definitive answer anywhere regarding the spacers etc.
In the end I found that only the thin spacer on the lower bearing could be used otherwise the top thread is virtually non-existent.
Even with this, it is only just enough and if the dust cover and washer are both fitted the amount of thread is very small.
One thread on the US site showed flattening the raised teeth on the adjuster screw and omitting the spacer (and I think dust seal) to get a bit more thread.
I'm going to play some more with this still but it just seems crazy that a common replacement part is so tricky and maybe dangerous as I guess there needs to be at least a reasonable thread for the adjuster screw to fix properly.
Any thoughts?
Cheers,
Andy

--- End quote ---

Andy, I'm one of guys who fit top bearing by "flattening the raised teeth on the adjuster screw"
Did on my 2 bikes (750 K7, 550 K1) it is just perfect (now several thousands miles done on them). On both I used AllBalls kit that contains needed washers and seals. I recently replied to similar thread here http://www.sohc.co.uk/index.php/topic,21563.msg192923.html#msg192923

Key is to use proper washer on the bottom bearing to get the same height (+/- 1mm) compare to OEM bearing.
Then, as top taper bearing is usually higher than OEM, either adapt adjuster nut (grind flanges) or you need to adapt headllight ears (compensate gat by O rings or washers) provided you have enough thread to fix top nut.

 

Navigation

[0] Message Index

[*] Previous page