SOHC.co.uk Forums > CB350/400
Cam chain.. CB400f
Clem2112:
My original 1978 F2 developed the cam chain rattle after a few thousand miles and only getting regular oil and filter changes, albeit every 1000 miles. The tensionor rod or arm was probably partially locked by the time I attempted to adjust it and the warranty had expired.
After that it was tensioned whenever it began to rattle , at idle , by gently applying pressure to the rod as recommended by the Honda mechanic ! .... and was the only non- invasive way to tension the blade. A slight tinkling/rattle when the engine was cold was deemed normal so long as it quitened once warmed up.
By 30,000 hard miles the head gasket started to leak slightly from the LHS, not harmful (Honda mechanic said) but annoying. So the head came off for a new gasket and while it was apart the tensioner blade got replaced (about £10 even then), the original had light but significant wear grooves. A few more thousand miles of hard use and the engine stayed quiet between the occasional "adjustments". So those DID chains are pretty tough.
ttr400:
Integra99, PM re the front engine mounts yes i still make them.
Also the cam chain adjuster horseshoe,(i make these for DSS) will be starting a new batch next week for DSS (he is out of stock)
Kevin
andut:
Do the job once and pull the engine - maybe more work & cost than you intended to start with, but you won't free the horseshoe pivot off by knocking the adjuster rod down from the front of the crankcase. It will also give you a chance to inspect the rest of the engine, replace oil seals, drive rubbers and both chains so that when you put the engine back in, you'll know it's good for a few 000's miles - you also have a step by step guide courtesy of Julie !
Nurse Julie:
--- Quote from: ttr400 on January 04, 2018, 02:55:56 PM ---Integra99, PM re the front engine mounts yes i still make them.
Also the cam chain adjuster horseshoe,(i make these for DSS) will be starting a new batch next week for DSS (he is out of stock)
Kevin
--- End quote ---
Your horseshoes Kevin, being made of alloy, do they wear out quicker than an OEM one?. I'm assuming they are made of alloy to be lighter in weight ?
ttr400:
Hi Julie,
The alloy it is made from is stronger than the cast/forged steel OEM part, the pivot point has brass/Bronze bushes pressed in to the alloy horseshoe which is mounted
to a EN8 steel bracket, the pivot pin is stainless or i sometimes use EN8 steel, it can also come apart if it needs to be serviced.
I designed this part many years ago, i did an update around 3 years ago. over the years i have manufactured and supplied over at least a 1000 of them, not had a failure to date.
It's also one of my favorite parts that i have done, nice to put on your desk and look at even if you don't fit it....:)
Hope this answers your question. Oh and your build thread is great. well done to you. looks like you are doing a great job.
Kevin
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