Thank you all very much for replying people, much appreciated.
The history of the VF1000 is as follows as I and my mates have owned all models available in Australia.
1984:
saw the release of the VF1000F (chain driven problematic cams due to lack of line boring) and VF1000R as raced by Wayne Gardener in the Castrol 6Hr (gear driven cams but also not line bored)
NOTE: Lots survived due to regular oil changes and/or oil feed modifications as I have done in order to get full oil pressure from pump to heads straight away on start up instead of secondary feed via gear box.
1985:
Honda released ,
VF1000F with modified cams and heads , thats to say longer cam journals and still chain driven
VF1000 F2 Boldor Tourer , I owned a silver/grey/black private import Austrian bike , and in my opinion the pick of the three models made, lots of grunt , very stable and won the production capacity class at the Isle of Man race in 1985 ridden by Greg Johnson.
Note the VF1000 F2 Bold or was also chain driven cams was the first model to get a twin spindle oil pump that also fed an oil cooler/radiator.
VF1000R with revised different two piece fairing , same colours used , red/white/blue , just in different styles depending on country with the exception of the Rothmans colour scheme due to their sponsorship of the Honda 500cc Moto GP team in that era.
Some countries got the single head light front , some got the twin head light front, the single head light model allows more air to pass between sides of head light and over the top of the motor for cooling purposes.
1986:
Only the VF1000R released to the best of my knowledge.
Thank you all again gents ,
if you have any further knowledge please post or email me as I'm about to register my 1985 USA VF1000R bike for the first time here in Australia and the government state roads and traffic authority here require I explain why the bike doesn't have an engine number but was registered in the USA and ridden the 9,400 miles in the USA before I bought and imported it from Chicago USA to New South Wales , Australia.
Regards
Stuart