SOHC.co.uk Forums > CB500/550
Planning ahead - fitting the primary drive unit back in place'
McCabe-Thiele (Ted):
Yesterday as I thought my back was on the mend I removed the end gear & bearing from the primary drive shaft - I ended up using a puller that came with my steering head bearing removal kit.
No damage caused to parts (operator excluded) came off a treat - that gear was quite tightly on - new bearings on order. (thanks Ken for bearing links)
McCabe-Thiele (Ted):
--- Quote from: Oddjob on May 29, 2023, 07:26:29 PM ---Not understanding your comments about the hub not coming off the shaft Ted, as it's the only way you can remove it from the crankcase it must have come off originally for you to take pics of it. Most are really really easy to remove, they almost fall off.
--- End quote ---
You are right Ken, I must have slipped the centre section back on the shaft after I removed it. Just fitted the new cushion rubbers the hub seem a tight fit on the splines needing some tapping to fit. Can the splines wear so it needs putting back on in the same position it came off?
Is it worth some wire brushing of the splines so the shaft fits more easily?
Oddjob:
No, don't do anything. It's correct that everything should be tight, that's how you want it, doing anything will accelerate the wear and lessen the life of the dampers.
McCabe-Thiele (Ted):
I'm okay with fitting the left side primary drive bearing as I have a drift tool that works just fine - but unsure of the best way to fit the right bearing without causing any damage.
Old right side (clutch side) bearing & end gear came off the shaft a treat with a puller but not sure of the best way to fit the replacement bearing without causing any damage.
I'm worried about getting it out of line - then getting the inner race stuck - is heat a good option - I do not have access to a press?
Any tips welcome please.
Oddjob:
Ted, stop overthinking this stuff. It's a bearing on a shaft, put the bearing onto the top of a vice and beat the hell out of the shaft, it's that easy, assemble the opposite way to getting it off. These aren't put on using a hydraulic press, they are just banged on by hand most likely. So long as you protect the ends of the shaft from damage you're good. I reckon 2 knocks of a reasonably sized hammer and the bearing will fall off.
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