SOHC.co.uk Forums > CB500/550

Planning ahead - fitting the primary drive unit back in place'

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McCabe-Thiele (Ted):
Just removed the circlip to check the primary drive cushions - they are very hard so I intend to replace them when my parts arrive from DS.

When I dismantled the primary drive it came out like in the picture when I drifted out one bearing, the second  bearing  is still on the shaft.

What is the best way to re-assemble this when I eventually fasten up the crank cases?

.primary drive hub by Macabe Thiele, on Flickr

Bryanj:
Back in same way it came out Ted, centre part with bearings, collars and gear held in place shaft with bearing and gear fed in from clutch side, more difficult to explain than do!

McCabe-Thiele (Ted):
The photo I posted is how it came out - atm the shaft is pretty much stuck to the central hub, photos in my manual show the left side primary drive main bearing as being placed in situ. The Starter Clutch & Primary drive hub with the chain in place lying with the starter gear meshed between 2/3 gear on the main shaft. Presumably when the casing halves are fitted together the shaft is then fitted from the clutch end of the casing.

Does this sound right?

Is there supposed to be a circlip fitted at the end of the shaft where the end gear is fitted in my photo can't remember if mine had one or not tbh ?

Bryanj:
Neither can i Ted, look at the parts book, and yes you fitting idea is correct

McCabe-Thiele (Ted):
Parts book showing the primary drive does not show the gear yet alone any circlip. It must be listed somewhere else.

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