Author Topic: Typical chain adjuster seized & worn in wrong place?  (Read 371 times)

Offline Macabethiele (Ted)

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Typical chain adjuster seized & worn in wrong place?
« on: March 21, 2021, 01:47:38 PM »
This morning I removed the cam chain tensioner horse shoe thingy. First off it seemed to be just solid it did not move on the pivot at all when in position.
When I undid the two retaining bolts I found it had some nice shiny parts in the wrong place I guess.


.
cam tensioner shoe by Macabe Thiele, on Flickr
Honda CB400F2 under restoration
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Offline K2-K6

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #1 on: March 21, 2021, 02:18:51 PM »
Once that pivot seizes the cam chain can't be adjusted any further as the facility to complete that is no longer available.

The chain usually makes a light rattling but nothing more, with the baginess allowing the slack to touch things it shouldn't. Rarely break, but soldier on quite gallantly until someone takes them apart for some TLC  :)

Offline Macabethiele (Ted)

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #2 on: March 21, 2021, 02:44:33 PM »
Once that pivot seizes the cam chain can't be adjusted any further as the facility to complete that is no longer available.

The chain usually makes a light rattling but nothing more, with the baginess allowing the slack to touch things it shouldn't. Rarely break, but soldier on quite gallantly until someone takes them apart for some TLC  :)

Luckily no recent PO had tried to tension it up so the original ajuster bolt & threads are all good.
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
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Offline Nurse Julie

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #3 on: March 21, 2021, 03:23:49 PM »
The CB400 four achilles heel.
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Bryanj

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #4 on: March 21, 2021, 04:29:46 PM »
Somebody was making stainless repos of those, was it ttr400?

Offline smoothoperator

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #5 on: March 21, 2021, 05:17:47 PM »
Looks just how mine came out Ted, completely seized but as per advice on this site by Trigger I ground out the damage with a Dremel and now it pivots freely. Picture is before I freed it off.

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Steve
2017 Triumph Bonneville T100
1977 Honda 400 Four

Offline orcadian

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #6 on: March 21, 2021, 05:21:53 PM »
The one you have can be repaired quite easily if you have a few different sized punches and access to a lathe - or a mate with one!
I have done a fair few of these both for myself and others - I added a short write up here:

http://www.stallard-engineering.co.uk/stories/Bikes/Japanese/Cam%20Chain%20Tensioner.htm

DS does a really fancy one but I think they come close to a hundred quid with vat and post.

Ian


Offline Macabethiele (Ted)

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #7 on: March 23, 2021, 03:29:14 PM »
Somebody was making stainless repos of those, was it ttr400?

I made an enquiry to  ttr400 they supply theirs to DS - they said it was cheaper off them than from ttr400 paying duty & currency conversion.
Honda CB400F2 under restoration
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Offline taysidedragon

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #8 on: March 23, 2021, 05:31:27 PM »
Mine was the same but freed up fine with a dremel and needle files. Pivoted beautifully afterwards.
Gareth

2010 Street TripleR
1977 CB400F

Offline Oddjob

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #9 on: March 23, 2021, 06:52:01 PM »
Somebody was making stainless repos of those, was it ttr400?

I made an enquiry to  ttr400 they supply theirs to DS - they said it was cheaper off them than from ttr400 paying duty & currency conversion.

I know that he sometimes comes back from SA to visit family, maybe he’s got a visit planned for this year and can pop a few in his luggage. If they scan them at the airport they’ll just think it’s a South African vibrator or something
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Offline ttr400

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #10 on: March 24, 2021, 07:01:35 AM »
Oddjob, been trying to get over since last year, but with Covid it's just too costly with all the restrictions etc.
I'm itching to get to my SA registered CB400F in the UK. had a trip planned for Iceland last year but was moved to this year...can't see that happening.
I often bring parts over with me, so far not had any issues with customs.

While i'm on here.....I need a CB400F 76/77 frame with V5 or a complete basket case bike. anyone who can assist in getting one would be appreciated.

Kevin
If you are addicted to the little CB400F then you might want to check out my website.
www.ttr400.com

Offline Oddjob

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #11 on: March 24, 2021, 03:22:33 PM »
Maybe later this year or even next Kevin, let's hope eh

Shame as you could have dropped a few of them off with me and I'd post them on as and when you sell them, just an idea.

Don't play stupid with me, I'm better at it

Offline Macabethiele (Ted)

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Re: Typical chain adjuster seized & worn in wrong place?
« Reply #12 on: March 25, 2021, 08:29:36 AM »
I have cleaned up the existing cam chain adjuster, 4 hours soaking in Oven Gel, rinsed  followed by 36 hours in Evaporust with a little Wet & Dry in the pivot gaps - pin rotates freely as well.
Moves about as it should removed the sharp edges caused by the chain - good to use again!

horseshoe adjuster by Macabe Thiele, on Flickr
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

 

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