I know this isnt really help, but I gave up on running the tilloston on my hm100, (I even had one done by EC, It still was awful) switched to a mikuni, never looked back. It doesnt have a vintage look, but it made the engine friendly to start and idle and more ridable. very tunable, the downside is you have to buy jets to get it just right. For me it was worth it, never going to use tilly again sold every one that I had. Good luck with your build up.