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CB350/400
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Cam Tensioner Rod, Springs and Bolt
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Topic: Cam Tensioner Rod, Springs and Bolt (Read 156 times)
Wrenchpuller
Newbie
Posts: 6
Cam Tensioner Rod, Springs and Bolt
«
on:
July 26, 2026, 03:38:47 PM »
Hi all,
It appears a previous owner has done a bit of a diy job on the camchain tensioner. The rod has been replaced with a cut bolt and there are no springs. Adjustment was done by a bolt and locknut to push the makeshift rod down manually. And the rod lock bolt doesnt appear to be correct either.
I have one of the new bronze bushed adjusters ready to go in, just wondering what the best course of action would be? I have a spare plug bolt and it looks like you can get the proper rod from DS, I've seen new lock bolts too. But the springs seem to be unobtainiable.
What do we think would be the best way forward? I have took some pictures also.
Thanks, Dylan
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Bryanj
Grogu
Posts: 12379
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #1 on:
July 26, 2026, 04:21:34 PM »
Dave Silver does a pattern pushrod but its all steel, no rubber pad.
You can get an tensioner plunger lock bolt kit from Honda Classics if the thread in case is OK , springs have be nla for some time but you can use a bolt and lock nut down the capped off hole.
I would helicoil the two holes for the horseshoe bolts
«
Last Edit: July 26, 2026, 04:23:13 PM by Bryanj
»
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Bryanj
Grogu
Posts: 12379
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #2 on:
July 26, 2026, 04:39:30 PM »
This is the manual adjuster on ebay, TTR 400 is a member on here but in South Africa, may be worth a PM to him
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Wrenchpuller
Newbie
Posts: 6
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #3 on:
July 26, 2026, 08:40:31 PM »
Ok ill see if I can get in touch thanks for your advice
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McCabe-Thiele (Ted)
Grogu
Posts: 8412
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #4 on:
July 26, 2026, 09:05:42 PM »
It's an expensive upgrade, it looks great quality.
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Honda CB400NA Superdream (current money puddle)
Honda CB500 K1 (second money pit)
https://www.sohc.co.uk/index.php/topic,28541.0.html
Honda CB400 four super sport (first money pit)
Link to my full restoration
http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556
Athame57
SOHC Master
Posts: 1942
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #5 on:
July 26, 2026, 10:32:36 PM »
The last thing I heard is that the two springs the push rod passes through can lose their strength over the decades but I can find nowhere that can replace them so far.
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I brake for animals!
1978 CB400F2 named Elen.
Laverda Dave
SOHC Jedi
Posts: 3554
Health is wealth
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #6 on:
July 26, 2026, 10:50:20 PM »
The last I heard was TTR400 only sells his horseshoe to DSS simply because the cost of P&P is too expensive to make it viable to post individually.
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1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'The Flying Banana'
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650
1990 Honda VFR400R NC30
Bryanj
Grogu
Posts: 12379
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #7 on:
Today
at 02:00:13 AM »
You can get the manual tensioner from 4 into 1 in the us or on ebay from them,
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Wrenchpuller
Newbie
Posts: 6
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #8 on:
Today
at 02:17:57 AM »
Yeah i have one of the TTR400 horseshoes on standby, might just end up getting a TTR400 adjuster bolt and a pattern push rod.
I wonder if we knew the specs of the original springs we could get some made, would need to know the specific force of each spring as it was new though, which might be a stretch lol
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Bryanj
Grogu
Posts: 12379
Re: Cam Tensioner Rod, Springs and Bolt
«
Reply #9 on:
Today
at 09:40:00 AM »
I bought a box of assorted compression springs on fleabay for about £6, you only need something to keep a small amount of tension if you use the TTR400 adjuster.
If you go direct to 4into1 its cheaper to buy but postage is a killer, you need a friend in us to act as middle man!
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Cam Tensioner Rod, Springs and Bolt