I recently bought a 2007 Vulcan 900 LT with 8400 miles. I have done some maintenance on it like oil change,spark plugs,air filter, and blend the brakes. I noticed a bit of carbon build up on my exhaust. And the bike did sound a bit low on rpm and messed with the idle screw by ear. And later bought a digital tach to set the idle to spec I used setting 2p1r on it. But don’t know if it’s correct. I set it to about 1000 rpm but it sounds a bit on the high side. I want to know what the spark/pulse input on these Vulcans.