[donald.bee1978]

reading the spec from both brand, Oberon have 32mm piston, while STM have 30mm piston. could anyone share which one perform better? which one is the best in reducing the clutch reistance?

 

[Donsy]

Depends on which master cylinder you're using.

 

[gotojoe]

In my experience the oe slave leaks a bit..Reports of the OBeron are that it doesn't leak...I don't know ABOUT the feel at the lever though. After riding a Jota anything is light..

 

[ARAMIS]

Oberon, no doubt about it!

 

[rsawkins]

I've not used the STM, but the Oberon definately reduces the lever pressure required compared to the oem one.

 

[donald.bee1978]

ow sorry, I was referring to the one for F4 guys. Anymore experience?

 

[Donsy]

ow sorry, I was referring to the one for F4 guys. Anymore experience?

F4's and B4's use the same OE master cylinders mate, at least up to 2009. Some guys though replace master cylinders with aftermarket models.,

 

[Lawbreaker]

Does the larger 32mm piston reduce lever pressure?
- I'm not complaining about lever pressure a bit... The MV is lighter than my Duc's

Looking to replace my OEM unit soon, not because I need to.... just want to.