The factory build 850 theres a few details on on Rons tripe on links , ran 10 .5 .Main problems getting out of the hole .
Hed switgh to a 4.25 18 TT 1oo for TRACTION . like Traction Engines , Er . The Circuit records on the ( I thought hideous )
Road runners , they surformed the sides flat . Trigonic like . Blah. blah .
Now , I think a old Pirreli 4.00 x 19 might be the go Young Stepen . Was going to Metion the dress code to these ruffians .
see the Tour post , standards have slipped . Shirt & Tie , from now on , everyone .Long ago enough to not incriminate
myself , and was totally inadvertant .
trundling at the usual 70 to Tech . We hit the stalled out traffic at the wooden overbridge , or before .On a foul wet
Auckland winters morning . Fudge , swing it onto the pea gravel , alongside the three lanes , by the inner harbour .
Dump it in second at 40 and drop the clutch toying with the throttle lets it spin up to relieve the fustration . After 50 Yds
I become aware that ' the vibe ' isnt all peace and happyness .
Glanceing back over the shoulder theres a 40 Ft. plus rooster tail for the fifty yds , Throttle shut you can hear it all distributeing itself over the first row of cars and the slurry drifting over the three lanes , with the gentle onshore Sea
Breeze .

:shock: :?

.
Exit Stage right , back through the traffic .
I would actually stick to the SV for that sort of thing , essentially its tearing the guts out of it .
Though , if you insist , closed roads where theres no risk to outsiders .Like a Drag Strip .
Generraly tend to avoid them , but Id use ' the bottom of the cam ' getting it of the line .
Country car clubs often have ' Sprint days ' on a closed road , where your just agaist the watch.
Brighton Car Club , its the Anual ' Brighton Pier ' . Cars & Bikes . Where the odd person drops theres Maserati or GT40s guts on the Promenade , as its a One Kilometer sprint .Usually about (or good , under ), 20 seconds ,
The worked 186 Holden in the Chrysler hardtop , youd hold 300 letting in the clutch.having warmed the tyres .
were road / circuit race ones, L.S.D. . If you got it out clear and didnt bog , youd hold 4000 till shifting at a staggering 5000 , get it right and itd spin in the beginning of second . for 16.9 @ 81 mph.

:?
What the thousand year old 1951 A10 BSA did at the Wangarei car club sprint. The 61 Bonnie did 14.4 @ 90 odd
but was r..ted.As the ' Farm Boy ' used to drive it at the limit and itd done 25000 on the back roads , no filters. No bite in clutch , bogging and revving short .pulling it down a few weeks later ,Main Bearings slack , some rings in 20 pieces , A 20 though feeler guage would go down the side of the piston .But shed earned her keep previously .
A Comp bikes best kept in fine fettle , for the Comps. Sort of an Honourable Retirement . :wink:
The pirreli dirt track tyre would chunk and go to pieces on tarmack, and a hideous road tyre on a Commando, but no
was the K 70 OK on the A10 Perrili squired and rolled on bumpy tarmac back roads. Theyve sealed the lot now .
Second hand ( low budget ! ) road runners were sick , continentals leathal. Tricks up there sleaves.Tyres are like Helmets
if second hand , get undamadged race quality ones . A tyre wrapped round the swing arm wouldnt be a joke .
Anyone got a copy off the ' Hop Up ' artical on the Pommy 10.5 Sec 850 , The other thing 10:1 C.R. was the 100 Octane 5 star fuel days , or 98 leaded used 9.5 really.The old T100 built in 1960 ran 7 1/4 :1 which equates with the 80 Octane pump fuel then .
No problem running race fuel or methanol , on a Track . Gets a bit awkward on the street, and a Engine built for it will
cough out hopeless on pump gas . I think 9:1 is about right for a Commando these days.Max. for touring / street .
Check out the local car clubs for closed road meetings , Hillclimbs and the like .A bit more relaxing atmosphere generally .
And often usefull contacts machineary / knowledge wise .