Hi, 

Delighted with my new 250 Sincro but the factory website says there are three variables for the clutch spring tension but no info on how to change them.

Has anybody tried it out yet before I take the clutch cover off?

 

Thanks in advance!

See de video from a Japanese on you tube whit de new Beta...!!!

It looks like the belleville spring support "ring" (#15) sould be offered in different thicknesses, similar to what TRS does. They only list one so far.

I believe it is like the Beta enduro clutch.... There are three positions for #17 to adjust preload on the spring.

Thanks to you both, v useful, I'll give it a look.

14 hours ago, nhuskys said:

I believe it is like the Beta enduro clutch.... There are three positions for #17 to adjust preload on the spring.

Makes sense - great design.

 

Hi Stevec , That explains why i might be having trouble with the clutch on my factory sincro , as the bike gets warmer during a trial im'e having to adjust the clutch on the lever more than enough which isn't good ! At first i thought it was the oil clutch / g-box so changed it to putoline ! also bled the clutch to insure no air was present . Plus the clutch is VERY light on operation and doesen't clear well making neutral a pig to find ..So on the back off what you are saying about the pre-load washer in the pic , the clutch may require more pre-load ? is it a matter of spinning the pre-load washer to increase its thickness ?

Any information would be much appreciated on this one . Rich

Position # 111 on the smaller outer clutch ring has the softest clutch pull, and less front wheel blip and potentialy more clutch drag. Position # 1 has the hardest pull with more front wheel blip and less clutch drag. Position #11 is in between position #1 & #111. This conclusion after many weeks of testing on a 2026 Factory Beta Sincro 250cc

I'm a bit surprised Beta kept the six fiber plate clutch pack. The one advantage of the diaphragm spring is its non-linear transfer curve. If the actuator is in the correct part of the curve the static holding pressure on the pack can be greater than the pressure needed to pull the clutch in. That's why the other bikes with diaphragm clutches use three fiber plates. And three plates means a lot less hydraulic drag. But Beta does like to milk parts inventory so maybe a three plate design will come in a few years.