Thanks codename47 and nozzlering for the kind words of praise.
manpreetvirdi, welcome to TAI
I myself have a 97 Carb 800.It is using an MPI kit from Auto escorts.
MPI is different from MPFI.MPI stands for multipoint ignition which is related to combustion of fuel, whereas MPFI stands for multi point fuel injection which is related to supply of fuel to the engine.
Auto escorts in an Indian company and they warranty the entire kit for 1 year.The kit comes with 3 NGK platinum spark plugs.You don't have to worry about CB points any more.They also make kits for the Yamaha RD350 and Royal Enfield bikes.This kit helps burn the fuel more efficiently.You can expect some amount of mileage increase.Please do not expect out of this world benefits though.Mileage increase depends on various factors.
How many Kms has your car run?What is the kind of mileage you get?What kinds of mods are you interested in performing.Lets us know.