I wouldnt rejet it from the Honda factory unless you modify intake or exhaust. Older carbs id run through a ultrasonic cleaner to bring it back to oem. vs jetting it.
Having owned dozens of modified dirt bikes and quads, the minor change from a #38 to 40 is a small change, not worthy of any other mods. The #38 jet was clean. The#40 made all the difference in the world. Unfortunately, to meet emmisions, the factory had to set up the quad super lean.
I wouldnt rejet it from the Honda factory unless you modify intake or exhaust. Older carbs id run through a ultrasonic cleaner to bring it back to oem. vs jetting it.
Having owned dozens of modified dirt bikes and quads, the minor change from a #38 to 40 is a small change, not worthy of any other mods. The #38 jet was clean. The#40 made all the difference in the world. Unfortunately, to meet emmisions, the factory had to set up the quad super lean.