SOHC.co.uk Forums > CB750

750 K2 Strip & Rebuild - help please

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Lobo:
Thanks Bryan; that gives me a few more options. (Ie replacement carriers)

Lobo:
The strip slowly continues and I note the two Primary chains are differing in ‘slackness’. Is this simply a spendthrift PO trying to save a bob and replacing one chain only… or can there be a more sinister reason? Obviously I’ll be renewing both, but would like to understand the cause…
Ta.

K2-K6:
Primary seems odd that one would wear more than the other, does suggest they've been swapped (or possibly one) at different intervals.

Anyway, it'll sort out with replacement.  To quantify the wear, wrap the chain fully round the bigger sprocket and pinch together,  then opposite the "join" pull the chain out away from centre to measure mm movement. Then do same with new it'll show just how much it's worn for interest.

Lobo:
Thanks Nigel - wildo. On the face of it only one chain has been doing all the work I’d guess; lucky the old girl was never thrashed….

Trigger:
Check the rubbers in the primary drive sprocket by holding the center and test how much the teeth move.

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