Dear Rajan,
I've gone through all the advices above and do not agree with any of the advices other than what Sivasankaran has suggested, however with that too I agree partially.
It is very much possible to change the PF contribution as I have got it for many of my clients and PF department has always agreed with us.
Contributing PF more than the STATUTORY limit, is at the option of Employer because it an additional cost for the company and company has the option to bear it or not. It is not an obligation for the employer to contribute more that what is required legally and at present it is Rs. 780 +EDLI and Admin charges on Rs. 6500/-
You have to simply get it approved in you Board meeting by your Board of Directors. Thats it, and nothing else; and you can start deducting PF on Rs. 6500 with immediate effect.
One more important thing I want to mention about whether you can deduct PF on 6500 for new employee and keep the basic as it is for old employees. The answer is NO. You cannot have discrimination among the employees at it is against the principles of natural justice, though not legally wrong.
Regards,
Kapil