Author Topic: 1977 Cb400f front forks help (Read 1074 times)

Can550 · « **on:** August 15, 2019, 10:04:14 am »

Removed both forks as seals were leaking. Stripped bottom Allen bolt (#14) of one fork so stuck there, other opened up but part #9 didn’t come out of fork.

Any thoughts of both issues please.
Thanks

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rupaulpierce · « **Reply #1 on:** August 15, 2019, 11:11:52 am »

Part 9 just gets hung up in there, should be able to poke/bang it out. It will fit through the upper fork seal.

Part 14... maybe reshape with a dremel attachment and use a larger hex wrench, or cut a slot and use a screwdriver? Either way soak it with penetrating oil and heat it up before you try again.

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Can550 · « **Reply #2 on:** August 15, 2019, 11:17:31 am »

#9 isn’t there
No where

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rupaulpierce · « **Reply #3 on:** August 15, 2019, 11:21:24 am »

Quote from: Can550 on August 15, 2019, 11:17:31 am

#9 isn’t there
No where

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In that case you need part #9

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rupaulpierce · « **Reply #4 on:** August 15, 2019, 11:25:57 am »

Are you 100% sure it’s not stuck in the bottom of the fork lower?

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jakec · « **Reply #5 on:** August 15, 2019, 11:30:04 am »

#9 is what #14 screws into. So you only have one problem, that's nice

jakec · « **Reply #6 on:** August 15, 2019, 11:31:31 am »

I would fill the fork lower with PB blaster and leave for a while, then try your favorite extraction technique. Probably too recessed to get a chisel on it so maybe try an extractor. I recently used one on an exhaust stud and it worked great.

rupaulpierce · « **Reply #7 on:** August 15, 2019, 11:36:16 am »

You sure 14 doesn’t thread into 5, sandwiching 9? I can’t remember. Anyway, I don’t know how the fork could function without 9.

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jakec · « **Reply #8 on:** August 15, 2019, 12:18:19 pm »

I think you are right.

Can550 · « **Reply #9 on:** August 15, 2019, 12:25:45 pm »

I think I can confirm it’s missing. Now do I have to have it or bolt it up without it.

It seems like function it serves is to keep spring in center ?

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jakec · « **Reply #10 on:** August 15, 2019, 12:59:05 pm »

I'm sure they put it there for a reason!

rupaulpierce · « **Reply #11 on:** August 15, 2019, 01:06:48 pm »

I would not bolt up without it. You can get a whole fork leg for under $50. I’m sure someone on here has a spare #9.

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bryanj · « **Reply #12 on:** August 15, 2019, 02:22:31 pm »

Just drill into the hex head with a 6mm drill till the head comes off you then replace the bolt and sealing washer, common thing in workshops of the day!

Can550 · « **Reply #13 on:** August 15, 2019, 05:52:16 pm »

Got the Allen bolt out of the other fork and part #9 was there. Bike is sitting in a place/ spot that I got to move it. Not sure what to do

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seanbarney41 · « **Reply #14 on:** August 15, 2019, 07:40:38 pm »

Any sohc4 (and probably lots more)is gonna have the same Allen screw.

rupaulpierce · « **Reply #15 on:** August 16, 2019, 10:07:00 am »

Quote from: seanbarney41 on August 15, 2019, 07:40:38 pm

Any sohc4 (and probably lots more)is gonna have the same Allen screw.

He also needs #9!!!

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rupaulpierce · « **Reply #16 on:** August 16, 2019, 10:09:04 am »

Can, I would buy a donor fork tube and get both part #9 and a fresh Allen bolt for your existing forks.

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rupaulpierce · « **Reply #17 on:** August 16, 2019, 10:10:14 am »

Check this out: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F202211711158

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rupaulpierce · « **Reply #18 on:** September 12, 2019, 06:24:52 am »

Can, you get this sorted out?

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Can550 · « **Reply #19 on:** September 12, 2019, 06:26:43 am »

No
I had to bolt it up without that part in order to move the bike as it was sitting in the middle of garage.

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Alaxy Galaxy · « **Reply #20 on:** September 12, 2019, 07:28:35 am »

You could aslo just get a pair of oil locks from England for fairly cheap.

https://www.ebay.ca/itm/202773492384

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Author Topic: 1977 Cb400f front forks help (Read 1074 times)