Topic: Crank/Rod brgs. 550 or 650?

[bwaller]

Paulages discovered the CB650 crank can bolt into the CB550 cases so I suppose that should be my answer. However Honda list the 650 bearings as "426" and the 500/550 were listed as 323.

Some of the 550 bearings have been showing up as NLA, and are now being listed as "426" and available.

Have the 323/426 bearings always been identical?

[Greggo]

Subscribed for the answer!

[dave500]

youll have to have a pair in your hand and look at them?maybe oil holes and grooves were altered?but still swappable between the two engines?

[bwaller]

The rod bearings appear to be the same, these were ordered from DSS as 13217-323-003 and arrived as "426." These are for replacement next off season so I can't plastigage until then to know for sure. As I mentioned it also appears (at least on online parts fische) that Honda is superceding to 426 for the rods brgs. so someone must know something?? I find it odd though that identical parts carried two different numbers from 1979 until 2013.

A friend has asked about the crank bearings and I just don't know Dave if there is a slight change between the two. 

I have asked DSS and Powersportspro for their explanations.

[purf_man]

the  easy answer is don't buy any honda main bearings.....

at least until I get mine for my 550/650 740cc build (sleeves being fitted as we speak...should be sizing my bearings in a month or so)