SOHC.co.uk Forums > CB350/400

Seizing horseshoes

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Athame57:
Much is said of CB400F cam tensioner arms (horseshoes) seizing up, but I don't recall anything being said about repairing them. I'm soon to find out if my own is truly seized up but will this mean I need to buy a new one, or can I get it fixed?

Nurse Julie:
High probability you'll be able to free it off and, fettle it and refit George.

Bryanj:
Siezing is probably not wholly acurate, what happens is a loose camchain batters the metal of the pivot point and burrs it around the pivot, most of the time,but not all, you can fettle the pivot with heat a carefull filing but it can take a couple of hours to get right

McCabe-Thiele (Ted):
Bryan describes how mine was - it repaired easily enough the burr I filed away then a combination of heat & sovents to free the pivot that was gummed up with carbon deposits.

I did consider the alloy upgrade but in the end stayed with my original as it was so nice & free.

Oddjob:
Keep the camchain properly tensioned and replace the chain when it needs it and it shouldn't happen again. The problem was owners not wanting to spend money on the bike and running the engine into the ground, saying that the design left a little to be desired IMO, far better to copy the 500/550 system but Honda decided not to for some reason. Maybe they just didn't foresee the problems the system would have, lets face it Honda are not well known for camchain tensioning design, CX500 anyone?

If nothing else I'd consider replacing or modifying the pivot pin, IIRC they look like dogs teeth when you remove them.

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