Got this 560 SEl about a week ago (with 722.350 Transmssion)

Problem.

1. Gear shift 2-3 at 2500RPM REGARDLESS of Bowden cable adjustment(tried Max and Min but Shift point still 2500RPM)

2. Doesn't go into 4, need to shift to N (from D) and back(at about 3000RPM) then tranny goes into 4

What could the problem? (Changed K1 spring kit, new ATF and Filter)

Could it be K2 Spring kit? If yes, where can I get K2 Spring kit?

Help appreciated.

Thanks in advance