Originally Posted by Airborne Spoon
ok so i have been having problems with the bike being lean between 3000 and 4500 rpm's 01 dyna 95 ci
i have the SE 44mm CV carb on there with the stock needle no shims and a 250 main jet unsure of the pilot jet size.
Agreed. Main jet is way to large. Go to a .195 or .200 tops.
As well, shim the needle jet, to eliminate lag during progression. (.050" shim to start)
Pilot jet is only for idle and low end throttle movements.
What people fail to realize is that, HD is under EPA stringency for emissions for idle and midrange rpms. The pilot jet and a/f screw settings will be lean from the factory.
NO company is monitored for WOT emission, therefore, main jet settings are pretty close to what you need, and fat, regardless of other settings.
Unless you replace cams, (like in your case) or something requiring more fuel, generally, the main jet in most carbed bikes is right on the money, or you'll only need to go one size larger.