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The Beta Clutch Fix


dan williams
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7 hours ago, tshock250 said:

I had a 2013 evo with clutch drag that got worse the hotter it got, cleaned the glue from the plates, switched to nano-trans no different. Only got better when i installed a whole new clutch from an old Techno engine that was lying around the garage.

To be honest my 2018 has an old clutch pack. I just bought a 2020 factory that looks like it was never ridden so I’ll have to see what it looks like inside.

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  • 1 month later...

Ooooh the 2020 Factory has a light-switch clutch and a bit of delay when trying to release the clutch. Also the pull is heavy. I wanted to try before I modify and I'm not surprised. Needs the carbon reeds too as it's easier to stall. Let the fettling begin!

 

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  • 1 month later...

Fettling done for now. Six thin (2.7mm) plates with the fix, 3mm offset washers and blasted the steels with fine aluminum oxide. Tried the bike and had massive clutch slip. Reduced the spacer washers on the throwout bearing about half a mm and all is well. Behaves pretty much like every other clutch I’ve done the fix to.

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1 hour ago, dan williams said:

Fettling done for now. Six thin (2.7mm) plates with the fix, 3mm offset washers and blasted the steels with fine aluminum oxide. Tried the bike and had massive clutch slip. Reduced the spacer washers on the throwout bearing about half a mm and all is well. Behaves pretty much like every other clutch I’ve done the fix to.

What are you running for final gearing Dan? Having tried 9/43 gearing with good results on my Evo 300, I'm now running 10/48 and finding 2nd gear very adequate for plonking around in sections with my 20 Evo 300 Factory. Clutch is also working very well.

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Posted (edited)

On the 2018 I added two teeth to the rear and liked it very much. 10/44 I think but I’ll have to look. The 2020 is still stock. Messing up my already dodgy timing but I’ll try to get used to it. I might go for the lower gearing later. 

Edited by dan williams
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  • 2 weeks later...

Hiya. People are still finding this thread.  Light switch to normal after mod. Thanks.  I've fettled and modified all sorts of clutches,  but never considered the fingers on the plates would be as touchy as the Beta ones.  2008 Rev Btw.

 

Thanks. 

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