SOHC.co.uk Forums > CB350/400

Fork Oil Weight?

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taysidedragon:
I use Silkolene 15w fork oil in mine. The fork action and ride quality is fine for my 14stone lump. 👍😁

Mikep328:
I ordered some Castrol 10W; we'll see how that works.  I'm a bit under 12 stone.

Mikep328:
GRR...   Using the correct size box end wrench I could not loosen either of the top fork bolts!  When I go to the bike next (a 1/2 mile walk from our house) I'll take a socket set but that will require removing the handlebar to get access.  I can't imagine that the fork bolt is supposed to be anywhere near as tight as these are.  Maybe I'll try the wrench again and give it a good whack with a rubber mallet to see if I can break the bolts loose without removing the bar.  Out of curiosity I looked in the service manual to see if there was a torque setting for the fork bolt, wondering if it was supposed to be much tighter than I think but I couldn't find a setting for that bolt.

Oh well, if things went smoothly it would be boring. ;)

K2-K6:
They aren't too tight in their assembly requirement, but can just be awkward to get them to undo easily. There's quite a bit of drag in turning them with their seal inside the fork tube.

I find them easier with good six sided socket and long breaker bar or big torque wrench, either of these you can apply decent consistent pressure downward to avoid slipping off, that while easily using the long lever so that there's no need to struggle with much rotation force, usually makes it all a little calmer.

Putting them back in, same method but while holding pressure on the top, turn it backwards (undo) to find the lead of the thread as it "clicks" down into place and then you can easily turn the right way to pick-up competent engagement in getting the thread started.

taysidedragon:

--- Quote from: Mikep328 on June 07, 2024, 06:43:27 PM ---GRR...   Using the correct size box end wrench I could not loosen either of the top fork bolts!  When I go to the bike next (a 1/2 mile walk from our house) I'll take a socket set but that will require removing the handlebar to get access.  I can't imagine that the fork bolt is supposed to be anywhere near as tight as these are.  Maybe I'll try the wrench again and give it a good whack with a rubber mallet to see if I can break the bolts loose without removing the bar.  Out of curiosity I looked in the service manual to see if there was a torque setting for the fork bolt, wondering if it was supposed to be much tighter than I think but I couldn't find a setting for that bolt.

Oh well, if things went smoothly it would be boring. ;)

--- End quote ---

Slacken the pinch bolt in the top yoke first.

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