The problem is usually a dirty or clogged carb jet, a vacuum leak, or incorrect jetting for altitude. Is your motorcycle only runs with choke on Only running with choke on actually indicates a lean condition, the choke blocks off the air making the mix richer, open will be leaner
The R-Series Pedigree - Motorcycle | Yamaha Motor Co., Ltd.
I did need to include after my early comments, that the reason it stalls when the throttle is opened up quickly is because of the lean condition and the fact that going from idle up to about 1/4 throttle includes the transition from the idle mix circuit to.
Many motorcycle riders complain about how their motorcycles can only run with a choke on
Read this article to learn why your motorcycle only runs with a choke attached. Why your motorcycle only runs on choke | dirt bike dies when choke is off | partzilla.com 04 how to inspect and adjust float level on a carburetor Rich lean fuel settings explained! However, several elements could cause this scenario (and they’re not limited to a plugged air filter or fuel starvation)
Let’s go over the most prevalent causes in this section Clogged carburetor jets arguably, the most common reason a dirt bike might only run on.
