Phaser Carb Update Bulletin

by: NY_SXR700

Click to Enlarge Bulletin

Service bulletin 1996 . Basically you can change the primary and main nozzles for a richer mixture. The primary nozzle part #80L-14489-00-00 has two .9mm holes as opposed to the stock nozzle's one 1.0mm hole.
There are at least 3 different main nozzles

Part #8Y2-14941-3A-00 is STD. has an OD of 6.5mm, ID of2.2mm and 12 0.7mm air bleed holes.

Part # 8Y2-14941-1A-00 has an OD of 5.5mm, ID of 2.2mm and 10 0.7mm air bleed holes.

Part # 8Y2-14941-2A-00 has an OD of 5.5mm, ID of 2.4mm and 10 0.8mm air bleed holes.

A smaller OD will richen the mixture at snap throttle and lean it at mid to WOT during steady throttle.
A larger ID will richen the mixture at mid to WOT conditions
Fewer and larger air bleed holes will richen the mixture at mid to WOT conditions.

You can use any combination of the listed nozzles for a wide range of mixtures, depending if you want to richen the mixture during snap or steady throttle conditions.

Full rich, at steady mid to WOT would be using the 80L primary and 2A main nozzle. Leanest would be STD primary and the 1A main nozzles.

For quick snap throttle conditions, richest would be 80L primary and 2A main nozzles. leanest would be STD primary and STD 3A main nozzles.

There is a chart that lists the calibration options from lean to rich in the service bulletin. Also the hole in the STD primary nozzle must face towards the air box.

Mtnviper

Any questions feel free to email the Webmaster.

Totallyamaha is not responsible for any damages that these modifications may cause to your vehicle; any modifications are your responsibility if you choose to do so. We are providing information ONLY. Some of these modifications may VOID your warranty and that is your responsibility to look into. The Totallyamaha users have passed along most of the information found on this site. If you have any questions or concerns about anything on this site talk to your dealer before using any of the information. Totallyamaha will not be liable for any damages or personal injury from any modification performed from this site.