Ok, so it's either a 1974-75 v169, mkIII Vc-auto drive, with MKI drive system, or a 1975-78 V198, MKIV with the MKII vc drive system ( there were two variants of this drive system, it was slightly modified in 1976) the eaiest way to tell for sure is the control, if you flip a metal bar to engage the drive, it's the 74 V169, if you squeeze a plastic lever on the right hand, it's a 1975-78 V198. If you post a pic of the full handle bars, i can post pics of the exact drive assy. To look out for.

Cheers
Ty

____________________________
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.