10/08/2026
The effect of temperature and elevation sometimes gets conflated because it is generally colder at higher elevations, but in fact they are separate variables on tuning. One of the benefits of CV carburetors over mechanical slides is that they self tune for these variables quite effectively. This is a big reason they became the standard on most street bikes by the 1980’s. It’s also worth clarifying that the pocket tuner shows two main jet types. In this video I’m referring to the red numbers which are for the large round main jets found mostly on street bikes, but in blue it also shows hex main jets found on VM and TM series carbs. I hope this helps and ride safe!