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The Beta Clutch Fix

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  • You bet!

  • markparrish
    markparrish

    Having only recently embarked on my trials experience I have been so pleased to have found the great advice and support on this forum. I thought you might be interested to see my clutch mod based on s

  • dan williams
    dan williams

    Your oil is roughly the same as 15wt motor oil according to the charts I can find so nothing odd there. It sounds to me as if your clutch is operating properly but you could try adjusting the set scre

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  • Author

If you don't do anything to lower spring pressure the engagement speed shouldn't be any different for just dumping the clutch. It should actually be slightly faster as the plates will hang less on the basket. If anything the release should be more consistent.

  • 3 weeks later...

Michele Bosi has a new design Beta clutch on his Facebook page

 

Is that a clutch or just a cover?

not sure lineaway. ...just found after 3 bike mods the engagement speed tends to slow....I now prefer to have the steel clutch discs linished perfectly flat as a first step even on a new bike. get really strong bite out of the clutch and no dragging/sticking...

  • Author

I agree with flat steels. Patterning them just reduces surface area but several people have had luck cutting holes or oil channels to allow oil to escape faster from under the friction pads. Perhaps there is a need for a design that has a quicker engagement just for pros? Maybe something like a continous pad ring and patterned steels like disk rotors to clear oil. It would be interesting to see what difference having engine driven steels and transmission fibers would make too.

Is that a clutch or just a cover?

Dont know for sure but the hose connects to the clutch inspection cover so it must be actuated differently.

  • 2 months later...

Can't you just remove 2 bolts from the pressure plate for a lighter clutch?

 If you ride the easy line, you can remove two springs. In the real world of trials, it will slip. This thread is about drag, not an easy pull.

  • Author

There is a bit of a compromise between pull and slip. For most of us bunny riders the immediate clutch response needed by the experts is not to our benefit. I used to pull two spings but had spacers made up that do roughly the same thing reducing the spring pressure. I don't get significant slip but others have reported it.

  • 2 weeks later...

Hi all, I was contemplating doing this mod but after changing my oil this weekend but have now opted not to. I have an 08 Rev 3 and up until last weekend have been using Putoline GP10. Bike has never started in gear, I could never find neutral when bike is running and the clutch plates always stick/bike jumps when selecting gear starting from cold. I decided to try the Putoline Nanotrans.... Wow what a difference. On first start, plates were not stuck and I found neutral while the bike was running with ease. Clutch seemed far smoother yet sure solid bite. Highly recommended (now £19.99 a tub online so a decent price)

Edited by italianstallion

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