2006 GS500F K&N Lunchbox and Yoshimura Slipon, What size jets should I get?

[Nick89]

I need to know what size jets to get if the bike has a K&N Lunch Box and a Yoshimura Slip-on.

[Big Rich]

Did you check the wiki?

[Nick89]

Therea a Wiki!

Let me find it!

[weedahoe]

I have a K&N Lunchbox and Yoshi and you can see my size jets in my sig. No washers and I'm 2-2.25 turns out

[Nick89]

The Bike will be ridden at 2300-7000 feet above sea level. Do you guys know if the 142.5/ 62.5/ 20 will be okay for this?

[jestercinti]

Jetting is a black art.  What works for you may not work for me.

Roughly, you'll lose about 3% power for every 1000' in altitude.  Jetting for higher altitude may not yield much though.  Air is thinner.

2500ft, I would not worry about it.  When you get closer to 5000 ft, jet slightly leaner since there is less air.