SOHC.co.uk Forums > CB750
Does this 750K5 look a good buy?
RGP750:
From an engineering point of view re "d " washers why would changing the bolt diameter stop the top yoke breaking??
the stress is in the ally casting and doesn't change by bolt size surely????
Trigger:
--- Quote from: RGP750 on July 19, 2017, 07:59:28 PM ---From an engineering point of view re "d " washers why would changing the bolt diameter stop the top yoke breaking??
the stress is in the ally casting and doesn't change by bolt size surely????
--- End quote ---
Oddjob has already been through this before but, I will go though it again. From unicorn to K4 on the 750 and 500 the bolt was 8mm into a 8.3mm hole, on these measurements a D spacer is required. In late 1974, Honda upgraded the top yokes with better alloy and used a 7mm bolt into a 7,3mm hole. Therefore more alloy it there to take the stress ;)
RGP750:
Sorry Trigg , I'll go with Better spec Ally but where i have seen them break the bolt size will be irrelevant :-\
JamesH:
Maybe this is a UK bike thing? Every original US import K5/6 that I've had in does have the D spacer...?
Trigger:
--- Quote from: Jamesh_sussex on July 19, 2017, 09:05:33 PM ---Maybe this is a UK bike thing? Every original US import K5/6 that I've had in does have the D spacer...?
--- End quote ---
Just dug out a original old microfiche on a USA K6 and can't see any D spacers listed but, clearly listed are the 7mmx54mm bolts ;)
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