• Welcome to the website of the Vincent H.R.D. Owners Club.

    Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Hon. Editor and Webmaster by calling 07977 001 025 or please CLICK HERE.

    You are unrecognised, and therefore, only have VERY restricted access to the many features of this website.

    If you have previously registered to use this forum, you should log in now. CLICK HERE.

    If you have never registered to use this website before, please CLICK HERE.

PD: Primary Drive chain


Well Known and Active Website User
VOC Member
What is the size of a standart comet primary chain,please? Erik


Well Known and Active Website User
VOC Member
It is a 428 chain. Comes in a 120 length that you then cut to length required. Last one I purchased was a Tsubaki 428QR-120

Rear Tsubaki 530QR-120, same story