SOHC.co.uk Forums > CB350/400

Cb400f Clutch basket rubber cush drive

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Oddjob:
Just took a 550 clutch basket apart Max, I have 4 or 5 and one was quite bad so I chose that one, one had a small amount of movement and the other 3 were fine.

A few questions if I can. I drilled the head off the rivet from the back, this allowed the metal plate to come off and that allowed the gear ring to be removed. I fully expected that what was left of the rivets would just knock through but they appear to be really well stuck in there. Was that the same with the 400? and if so what worked best for you.

The cush rubbers are not the same as the 400, similar but a different internal shape.





You reckon you could make some to suit? I want about 5 sets if you can.

amx1992:
Most of my rivets just tapped through with a centre punch and a bit of heat, I did have a stubborn basket which I had to drill about 3mm diameter most of the way through then put a small pin punch down and it moved quite easily after that.

Those rubbers look like they couldn't be made manually because of the funny shape, id say the best way would be laser or waterjet cut from a sheet. They do look a lot more like the modern clutch basket rubber shape Honda uses, maybe something already available might fit them?

https://www.denniswinter.com/off-road-c1/parts-c91/clutch-parts-c240/clutch-cushions-rubbers-c559

Oddjob:
They do look like the ones on that site Max, I'm not sure they're worth £60 odd though,

Laverda Dave:
I forgot to call my BIL about the viton when he returned from his holiday., I'll give him a call tomorrow.

Oddjob:
Let me know Dave, I may need some as well.

Removed the rivets from both clutch baskets, some needed drilling right through at 3mm and some just popped out after the basket was left in the sun for a few hours. Some need a lot of heat, all out now though and no damage done. Tapped one basket out to take 6mm screws, cleaned up both baskets, ring gears and plates, even cleaned the bronze bearing inside the basket. Looking really nice now. Ordered a countersink tool so I can countersink the metal plate to take the countersunk 6mm screws I'll be using.

I may have found a local company to do some waterjet cutting, will see how much they'll charge. Just need to source some 10mm Viton and I'll give it a go. The rubbers appear to be 28mm circular. Which may be ideal as my hole cutter set has a 28mm hole cutter in it.

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