KDXRIDER.NET

Wonder if anyoane tried vforce 3 reed valve from aliexpres. How it's working, is it decent at least ?

It's not a VForce3, despite being sold as that. It's a cheap Chinese knock off / clone / forgery... I would never trust anything like that to be much good, and if it does work well for a while, it's largely a coincidence that they got it close-ish to the real deal on a super cheap budget with low quality materials and low QC.

Moto Tassinari now has a VForce4 out. I have been curious about that and would either run one of those, or buy a Boyesen RAD Valve. The RAD Valve is very very nice quality and will last a lot longer than the v-force reed blocks, whose plastic housing can crack with age or drastic temperature changes, cold air hitting a very warm engine climbing mountains and then descending or splashing ice cold water on a hot engine.
The Boyesen version is a bit different but is made out of solid aluminum, not plastic, and does not use a proprietary OEM type intake manifold, and instead just uses a basic rubber coupler which is not so exclusive to the KDX or any particular model.

I have the VForce3 AND a RAD Valve, both work great but I would only go with the updated VForce4 (no VForce3) now that it is out for our bikes for the past year or two, or my previous preference the Boyesen RAD Valve.

I would have to pass on trusting it from Alieexpress to open and close 150 times per second and not chip away into the engine.