A olde Daytona I rode , had like truck / earthmover / digger - radiator hose for the runners ,
rather thick hard laminated reinforced straight stuff , to get the dual 30s behind the seat tube .
Mustve worked , it'd blow of a 650 , both two up .
And all the whizz bangs on the dirt / metal roads , on a ralley . While Two Up .
The only one that got past , as I was map reading ( the pillion was blonde ) then had trouble with
a farm gate then, as the road went left , then right , then straight across the highway , around a house , past a boat ( on a cradle )
( got a wave there ) , and back on the highway , or was that the bike . a few got past there , but tarmac dosnt count !
The + 40 650 pistons mayve helped too , the 59 frame was good on gravel / clay . Didnt flex much untill 90/100 mph .
Moir Commando had the long intakes , Mk II Amals about that posn . ( Against the rear of the cross brace ) .
The smooth Curve of the pipe bends they were fabricated from , blended marelously into the port curve .
Cant help but wonder if / at the KINK in the Std. manifolds could get stalled - Tumbling turbulance & choke
there in some circumstances. Like when the engines running .
Thinking the one cylinder below 2.000 rpm was the lack of balance tube .
And think only materialised AFTER Id fitted the BSA advance unit . 30 Deg or whatever it was .
The pick up on the thing was outstanding on the higway on light throttle , and if you got it past 3.200 elswhere . Combat Cam .
And yes , as hobot states , past 5000 was eyeballs back in the sockets .
Thinking , for the street , a balance tube ( maybe at the mounting flanges ) about 1/4 bore , may well be worth F'ing around with .
The Japanese response to ' styling ' , was to add more .