What are people running for jetting at 9000+ on the 700 MM single head gasket reed spacers boysen reeds silencer mod. I always seem to get a lower end burble on mine.
ModMMax
New member
I worked on mine for years trying to get rid of that same burble. IMO the only way to get rid of it is to use an ATACC with remote fuel screw adjusters. I am jetted clean at 1800 ft with needles down 1 position and #60 pilots. It works good to 1200 ft. Mine is piped and ported with a peak performance head but the burble stayed until the ATACC was installed.
I had an attac on it for one season but it ran to rich at altitude that I pulled it off.
jt specialties
New member
128.8 or 130's across the board. Needle in stock position. air screws as needed for responce. around 2 turns out usually ok to start.