jcyamaharider
Member
Starting a new thread to share some info that I basically already knew, but re-verified last night. While asking a question about the difference between 2.0 seat and a 1.5 seat for performance I was told that the stock seat was 1.5, which is fine and I did change out last night. [MENTION=72134]1983[/MENTION] also shared that I needed to put in a 1.5 needle and seat as opposed to a 2.0 needle and seat. Eluding to a matched set, which is false. The needle on both seats are the same, the bore for the needle in the seat is the same and the depth is the same, also along with the taper angle of the seat and needle. The only thing different is the metering hole thru the seat. This is so you can change just the seat to tune the carb or just the needle if worn out and has ridges. Yes it is optimal to change both at once if you suspect an issue but you can just replace one item as long as you do the proper test and verify it is within spec. I have done this in the past on many mikuni carbs. I am just a seadoo noob not a engine or motor noob in general. This is why I defer to this forum and the collective knowledge that it has in regards to my seadoos but when I get bad info I will point it out.


