Got it sorted - Midi CC's 100 = 0  & 101 = 0  then CC#6 = 1-96  to increase pitch bend range !!

Not nearly as good? What are you meaning? In what way, specifically?

Do you have ableton suite? opfour sounds really great and comes with it:
https://www.ableton.com/en/packs/classic-synths/

Hi yes I bought FM Drive a while back but I have found that VOPM sounds better which is odd as I know it's a YM2151 emu, the same bank of instruments imported into FM drive sounds not nearly as good as when in VOPM

Unless you've got a very special reason, just switch over to FMDrive. It's a far better emulation of the Sega Genesis sound chip, and can also do all the LFO'S found on the YM2151 arcade chip.

FM Drive is a VSTi that has built in pitch bending functionality. You should definitely be able to go beyond an octave with ease. Check it out:

http://www.alyjameslab.com/alyjameslabfmdrive.html

Hi folks, I'm trying to get VOPM to pitch bend a full octave in Ableton and have read the manual but can't seem to increase from the default range of 2 semitones ? any help is welcome you genius' !

P.S - I read the VOPM manual and successfully sent CC's to get the cool LFO delay but cannot get the pitchbend range increased