First of all, are you writing the patch you modified to User memory and then assigning it to a Performance part? If you make modifications (to the LFOs, in this case) to a "preset" sound, these modifications will NOT be reflected when that sound is selected as a part in a Performance.
If you did that, then go to the LFO page and set the rate of the LFO(s) to a setting that = a note value (for example 24=sixteenth note, 48=eighth note, 64=eighth note triplets, etc.).
If the timing still doesn't seem right (e.g., delayed), check other parameters like the attack time in the tones' TVA envelope.