25-27 MPG is still very bad mileage no matter what jets you are using. Our choke is not really a choke but a separate fuel circuit that allows more fuel into the carbs, rather like having a HUGE idle jet. Unless you have a leak somewhere I'd suspect a problem with the "choke." Either that or the heaviest throttle hand around.
I’ve noticed that when the choke is engaged the bike not only runs much faster at idle but engine braking is significantly reduced. If you’ve had a problem for some time you’ve probably gotten used to it. Try taking a dealer demo bike for a short spin and see if it feels much different. If it slows much faster at idle than yours that may indicate a “choke†problem.
We all like to think of ourselves as rugged individualists. But when push comes to shove most of us are sheep who do what we are told. Worst of all, a lot of us become unpaid agents of whoever is controlling the agenda by enforcing the current dogma on the few rugged individualists who actually exist.
| 
