SOHC.co.uk Forums > CB750

Some Minor Issues to Sort

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Oddjob:
Yeah it's a casing split to replace that one AFAIK, not the expert on the 750 as some members on here, didn't like them back in the day, still don't like them, I avoided working on them whenever possible. Not saying the 750 is a bad bike, far from it but I thought the 500 was a far superior bike and I concentrated on that model in preference.

Johnny4428:
For what it’s worth definately worth splitting and whilst in there checking everything all cogs, dogs, bearings etc. Also phobia about lateral movement in that fifth gear, which in my case I had to shim to take out about >1.5mm, doesn’t sound a lot but when you’ve only got 3mm of insertion 2/3 into 5 cog it’s too much as I found out to my cost.

Martin6:
Thanks. I've removed the chain and the front sprocket rotates freelywith no noise. I've removed the sprocket and confirmed there is no lateral movement in the final drive shaft. The shaft looks quite clean and sharp machined castellated edges.

So, I am relieved. I can’t afford a strip down at the moment. I want a season to ride the bike, find any more issues and then, maybe next year is the renovation year, if needed.

A picture of the front sprocket and retaining plate is attached. I will replace these, new chain and tab washer. Rear sprocket looks fine.

On a 1976 made K6, is it a 520 or 530 chain, I think it's a 520? 102 links? Can't find it in the Honda manual.

Bryanj:
That sprocket is definately worn out, put up a pic of the rear wheel sprocket before you buy any thing as a kit can be cheaper

McCabe-Thiele (Ted):
I agree with Bryan that front sprocket shows quite a bit of wear - in my head they become more spikey with mileage. It's a little used technical term I've learnt.

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