It's been a while since I last used Kvaser's LabVIEW library and I don't currently have it installed, but the documentation says there's a canSetBitRate function. If that function is not exposed in the LabVIEW library, you can call it directly from the DLL. If for some reason that won't work, you can manipulate the CAN timing parameters directly by using canSetBusParams or canSetBusParamsC200.