Building a race bike

Decided to make myself a slipper clutch
I recon if this thing gives the power i intend and hits the weight i intend it will be rather a handful without one.
Just ordered a spiderless Ducati wet slipper clutch kit that rotaties in the correct direction for the Laverda, as soon as it arrives i will start chopping out the drive spline to fit the gearbox shaft or maybe the other way round, will have to see. Either way its going to be fun and as its quitte a bit smaller it should help with weight also.
Excited to have it arrive.
J
 
julian said:
Decided to make myself a slipper clutch
I recon if this thing gives the power i intend and hits the weight i intend it will be rather a handful without one.
Just ordered a spiderless Ducati wet slipper clutch kit that rotaties in the correct direction for the Laverda, as soon as it arrives i will start chopping out the drive spline to fit the gearbox shaft or maybe the other way round, will have to see. Either way its going to be fun and as its quitte a bit smaller it should help with weight also.
Excited to have it arrive.
J
Click to expand...
be keen on a pair as well Julian, triple spline is the same
 
A little bit of work and the clutch is on, now just have to machine up the basket, and design it of course, which is not an easy job, Not much room in there as the new clutch pack is quite a lot longer than the Laverda unit.
Maybe start machining this weekend.

Jules
 

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I’m still wondering how you are going to fit a clutch drum gear, with enough clearance to miss the rear of the cases. From the angle of the picture, it looks like there is more distance to the idler gear than the case at the back.

But then, what would I know? I’m not a mechanic.
 
Simple solution Chris. It's only the few teeth that are actually engaged with the pinion that take the load. All the rest are doing nothing so you may as well get rid of them.
Same kind of logic as a flat tyre only being flat at the bottom.
 
Fuck me, I should have thought of that!

Carry on Julian, just make the gear with three teeth….. Cam, with three teeth, if one tooth busted what then? An old sheep gear?
 
Lothar, It's lighter like that and the welded rod is what is known as a "Fusable link" to stop other things from breaking :LOL::LOL::rolleyes:

Chris, there is room for the gear without issues but the support bearing arrangement is not easy, the gear will need to be integral with the basket but again that is the easy part.
Have not got a completely happy solution to the support bearing yet but should be sorted soon. I'm not really worried but it needs a little careful thinking to avoid troubles down the line.
I think 3 teeth would only help the clearance problem that I don't have so not a benefit other than weight, I thin though i have quite a few gears here from customers cars like that so I will check out the theory 🤔🤔 I am sure there is a fault somewhere in that?

Regards,
J
 
It's coming along nicely.
Lots more to do before its finished though.
J

PS.
I know the drive gear is a sprocket, the gear has no spline in it yet so this is just for alignment.
 

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Small update,
Clutch basket machined up now and just needs some finishing and the gear welding to it. Did the simple side last night and need to now weld the back face in a way that it has no simple stress lines and spreads the load. (and not get too hot) Probably do it on Thursday evening if time allows.
Here is a little shot of the clutch test assembly prior to finishing etc.
Still need to loose more weight but it already weighs substantially less than the original setup.
When finished I will draw it up (or scan it) and send the details to Red, He can then decide if he wants to make some for himself and others.
One and only drawback for general use is that you can not use the original cush drive (easily) but not a problem for a light weight race machine.
 

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Last edited:
julian said:
Small update,
Clutch basket machined up now and just needs some finishing and the gear welding to it. Did the simple side last night and need to now weld the back face in a way that it has no simple stress lines and spreads the load. (and not get too hot) Probably do it on Thursday evening if time allows.
Here is a little shot of the clutch test assembly prior to finishing etc.
Still need to loose more weight but it already weighs substantially less than the original setup.
When finished I will draw it up (or scan it) and send the details to Red, He can then decide if he wants to make some for himself and others.
One and only drawback for general use is that you can not use the original cush drive (easily) but not a problem for a light weight race machine.
Click to expand...
If Red wants to do them, he can send me one
 
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