Thanks for the comments Brian, can't use a stock airbox on the Harris, so have to use pods. I've found a needle, bit worn but should be ok. The carbs are stripped, all parts cleaned, carbs boiled up on the cooker. I have been running 134 mains, stock pilots and jet needles set at lowest groove. Got about 118 bhp at the crank on these settings, with flowed head, 1172 WISCO and a pipe, Rob at Mistral built the motor a few years ago.
I found all sorts of crap in the carbs and one of the vacumm pistons has been sticking, so I'm hoping for a big improvement.
When it's set up I may try 145 mains, #40 pilots and 3rd groove for the needle. These are the settings recommended by Wired George, an american carb guru. Site is
www.wgcarbs.com worth a look.
Cheers,
Rod