You'd be best to read and/or ask your question in the BST bible.
When I made similar mods, the bike was very stall-prone off-idle. The solution was to move the needle clip back to pos 3. Been fantastic ever since.
Originally Posted by Steve McQueen
All racers I know aren't in it for the money. They race because it's something inside of them... They're not courting death. They're courting being alive.