Just put full Yoshi exhaust system, Pro Flow intake with K&N air filter, and air box lid off. What pilot jet and main jet should I run. Should I adjust the needle? I ride mostly at sea level.

Thanks for any info.

 

what quad are you talking about?

 

the instructions that come with my Yoshi full comp system says 150 main jet ... This is what they have listed on their site....


Instructions may have incorrect recommended jet size

LTZ400 Slip On Exhaust:


217253, 2175600

Jetting for Stock Airbox with no modifications:
Stock main jet #125.0

Jetting with airbox snorkel cover removed:
Mikuni main jet #145.0

Jetting with airbox lid & snorkel cover removed:
Mikuni main jet #152.5


LTZ400 Full System Exhaust:

2175157, 2175500

Jetting for Stock Airbox with no modifications:
Mikuni main jet #122.5

Jetting with airbox snorkel cover removed:
Mikuni main jet #145.0

Jetting with airbox lid & snorkel cover removed:
Mikuni main jet #150.0

 

i had the exact setup you are running and i had a 150 main and i put both washers under the needle to raise it a hair if you pull the slid and needle out you will c what i mean with those mods it ran great and i rode it like that all summer at oreogon dunes sea level it should b spot on for you

 

Thanks for all the info guys! The quad is actually my buddy's Z400. I'm just trying to get him
in the ballpark.

GB

 

Do you know what jet for high elevation (3000-4000) on the ltz-400 w/ yoshi slip on, and no airbox cover?