i've been running my carb lean because i've had a dirty mixture in the cylinder, through the propaganda I didn't want a "high end pipe" but that comes from the regular sized cylinder people. thats means a useful pipe for larger cc'z
Expansion chambers are very similiar between both. the doppler i don't think it have to mess much it has a movable coupling thing and an extender with it. Thanks for the simonini update. Both expansion chambers are very similiar in size the doppler header looks more of a narrower powerband.
in time i can make one but i'm designing some other things