Hello everyone,
I Solved the problem, its start from steering bearings
grease is dried-up,
I clean the bearings,
filled with heat resistant grease
easy..
but be removed, very detailed.
I dont have a lot of tools and it takes my two hours.

thank you for all helps.

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Ported Head / 0,25 mm Thin head gasket / +2 TB / Stg 2 Hotcam / K&N Filter /Brisk Colder Spark Plug / DNA Stg2 Filter / 35 mm fork Spacers / 15 W fork oil / Fork Lowered 20 mm/ Ais Blocked / re-route engine breather / 44T Rear Sprocked / Carbonium Rear break hose / Crd 40mm exhaust pipe / rear spring two click stiffer / Home made Fork & Swingarm Protectors./ Front fork stabilizer (OTR)