Recent Posts

21

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by limeyrob on Today at 10:02 »

Without the shroud I would expect the clutch cage to spread out. Its not on the C10-12 which are only about 10hp.

22

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by Triton Thrasher on Today at 09:34 »

It's a dry clutch, the cover shroud is to prevent oil contamination of the plates

To have a dry clutch, you have to keep oil out of the clutch.  Just telling people “It’s a dry clutch” is not valid engineering.

That tin hoop leaves gaps that let oil in.

23

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by JulianS on Today at 09:13 »

I think the "shroud" is about adding strength to the clutch basket. The design is not sealed against oil with or without the shroud.

24

Introductions, Stories, Meetings & Pictures / Re: What have you done with your bike/s today?

« Last post by Swarfcut on Today at 09:13 »

 Found that bargain inner primary chaincase (S/A) has a nice big twist where someone had neglected the spacer to the frame. Lug also broken off, which explains it all. Anyone experienced with bending alloy die castings preferably with a barbecue, 4 lengths of lumber and 4 G Clamps? Cost me peanuts, so no big loss but annoying all the same.

 Swarfy.

25

Introductions, Stories, Meetings & Pictures / Re: What have you done with your bike/s today?

« Last post by limeyrob on Today at 09:10 »

But has it forgiven you yet?

26

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by limeyrob on Today at 09:08 »

Yes, clean it up and take it to the local body shop and get them to spot weld it back on.

27

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by Swarfcut on Today at 09:04 »

 A backyard repair would be to drill the shroud at the spot weld points and plug weld the shroud back onto the basket. A mig weld would be fine, tacking it back in place  in situ with little or no heat distortion. Do the preparation yourself, ask around for someone with a mig. Reckon it could be done with no dismantling, apart from taking out the plates just in case, so an easy fix.

 Swarfy.

 Additional. Make sure the shroud is well away from the clutch lined plates tang slots. Too close and the plates will not be able to move freely, (look for witness marks) so the clutch will drag. Clutch may actually free off better without the shroud. This also applies to the infamous 6 Spring Clutch which also has a shroud. R.I.P.  'Nuff said about that damned device.

28

Amal, Carburation / Re: Which carburettor

« Last post by limeyrob on Today at 09:02 »

I've just got a Concentric for my A10 but I have a soft spot for the Mononbloc, they last forever and are easy to work on but the float cover often weeps a bit.

29

Gearbox, Clutch, Primary / Re: 4 spring clutch shroud (swinging arm)

« Last post by Billybream on Today at 07:44 »

It's a dry clutch, the cover shroud is to prevent oil contamination of the plates, the primary chain uses oil for lubrication and runs through the oil contained within the chain case.
If you are prepared to lube the chain via chain lube through the filler/inspection cap you could get away without the shroud, alot depends on mileage.

30

Gearbox, Clutch, Primary / 4 spring clutch shroud (swinging arm)

« Last post by Craigy on Today at 06:34 »

Hi guys,

Sorry if this has been asked before.

The shroud that is spot welded onto the clutch has come adrift. Ive checked the parts book and it’s not listed.

Ive been told this part is not. Required but better for it to be in place.

It requires the clutch to be removed as it requires welding back in place - removal and welding are both beyond me.

Does anyone have any info on this? What job the shroud does and what are the implications of it not being in place.

I’ve provided pics for reference.

Many thanks

Craig