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Author Topic: Cb350f seized lower triple clamp  (Read 338 times)

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Offline b_mick

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Cb350f seized lower triple clamp
« on: October 03, 2022, 06:04:28 PM »
Hey guys, I’m currently replacing the steering head bearings on my CB 350f and I’ve run into some issues. The lower triple clamp is seized and will not come out of the frame. Any tips that you guys might have to remedy this and/or do you think it would be OK to just hammer down on the steering stem to get it to come out? I know this is kind of a basic question. I’m just scared of breaking something.
Thanks
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Offline spotty

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Re: Cb350f seized lower triple clamp
« Reply #1 on: October 03, 2022, 06:14:49 PM »
assuming you have removed all the collar nuts etc from the top of the stem put a piece of wood on top of the stem and smack it with a hammer, starting gently and allow the force to build proportionately with the frustration when it still doesn't move
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i blame Terry

Offline newday777

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Re: Cb350f seized lower triple clamp
« Reply #2 on: October 03, 2022, 07:07:02 PM »
Quote from: b_mick on October 03, 2022, 06:04:28 PM
Hey guys, I’m currently replacing the steering head bearings on my CB 350f and I’ve run into some issues. The lower triple clamp is seized and will not come out of the frame. Any tips that you guys might have to remedy this and/or do you think it would be OK to just hammer down on the steering stem to get it to come out? I know this is kind of a basic question. I’m just scared of breaking something.
Thanks
It seems that the stem is possibly rusted to to top bearing.  Have you been using PB Blaster to hopefully work on the rust? Have you tried heating the bearing to help break it loose?(Just have to be careful not to catch the grease on fire). Hitting the top of the stem with a block of oak and hammer after heating is okay.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline b_mick

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Re: Cb350f seized lower triple clamp
« Reply #3 on: October 03, 2022, 07:31:30 PM »
Thanks for the advice. I’ve heated it up and put some penetrating fluid all in it so hopefully it’ll come out. I was just worried about damaging it so thanks for clearing my head a bit. I figured it was probably just rusted with it being 50 some years old and original.
Thanks
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Offline Kelly E

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Re: Cb350f seized lower triple clamp
« Reply #4 on: October 03, 2022, 07:50:22 PM »
Make sure you have something or someone there to catch it.
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Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline bryanj

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Re: Cb350f seized lower triple clamp
« Reply #5 on: October 03, 2022, 09:00:49 PM »
And dont fall over on the balls all over the floor
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Stev-o

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Re: Cb350f seized lower triple clamp
« Reply #6 on: October 04, 2022, 09:06:39 AM »
Do you have a BFH?!  That is what you need.
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........
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